{
  "book": {
    "title": "轻·远：德国约格·施莱希和鲁道夫·贝格曼的轻型结构（中英文本）",
    "title_en": "Light Structures",
    "publisher": "中国建筑工业出版社",
    "year": 2004,
    "isbn": "7-112-06816-9",
    "source_file": "轻·远 德国约格·施莱希和鲁道夫·贝格曼的轻型结构 中英文本 ( etc.) (z-library.sk, 1lib.sk, z-lib.sk).pdf",
    "pdf_page_count": 322,
    "source_sha256": "a8dfbf4b3671b10103177ac3801bc9b306715eced6f3a559cbd92f71ba3de39f",
    "page_mapping": "本文件PDF页序比本中文版实际印刷页码大1。例：PDF252为印刷251；页边常同时印出该跨页的250|251。书内部分英文交叉引用及缩图索引沿用原版页码，不能直接当作本PDF页序。",
    "rights": "所裁图片均来自用户提供的书籍扫描件，仅用于本地研究和教学备课。公开传播、教材印刷及商业出版需另行核实版权方和摄影作者授权。",
    "extraction": "直接从PDF内嵌1944×2592像素扫描图裁选，保存JPEG；未使用生成式AI补造实桥照片。",
    "case_count": 10,
    "image_count": 26,
    "credits_reference": {
      "page_pdf_1based": 320,
      "printed_page": 319,
      "heading": "插图说明 / Illustration Credits",
      "note": "原书为部分摄影师单列署名，并说明其他照片及制图来自Jörg Schlaich或Schlaich Bergermann und Partner。具体图片作者须结合原版与中译本页码差异逐图核对；本清单不推定版权归属。"
    }
  },
  "cases": [
    {
      "id": "L01",
      "title_cn": "波鸿加伦索大街S形人行天桥",
      "title_en": "Footbridge over Gahlensche Strasse, Bochum",
      "year": 2003,
      "pages_pdf_1based": [
        247,
        248,
        249,
        250,
        251
      ],
      "printed_pages": [
        246,
        247,
        248,
        249,
        250
      ],
      "summary": "以两段反向圆弧组织行走路线，用曲线圆环梁与内侧单边悬挂体系统一路径和受力。",
      "key_facts": [
        "两段圆弧各长66m，平面半径46m。",
        "截面图给出3m桥面宽和0.89m三角梁高，截面随桥长改变左右分配。",
        "两根倾斜塔杆位于圆弧内侧，主缆与吊索共同承托桥面；不是直接塔顶扇形斜拉索。",
        "书中解释塔杆不另设稳定背索：塔脚低于两侧主缆锚点，并采用铰支塔脚。",
        "圆环梁内侧支承时，上部环向受拉、下部环向受压；该原理支持把实体截面离散为索与杆。"
      ],
      "category": "bridge",
      "evidence_scope": "几何与体系证据较完整，适合教学建模",
      "images": [
        {
          "path": "images/L01_photo_1.jpg",
          "caption": "S形桥面与两根内侧倾斜塔杆，展示单侧主缆和吊索",
          "page_pdf_1based": 248,
          "printed_page": 247,
          "kind": "photo",
          "width_px": 1759,
          "height_px": 2008,
          "source_crop_normalized": [
            0.037,
            0.18,
            0.942,
            0.955
          ],
          "source_crop_pixels": [
            72,
            467,
            1831,
            2475
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L01_drawing_1.jpg",
          "caption": "平面与三种三角形截面；原图含10m标尺、桥面宽3m及梁高0.89m",
          "page_pdf_1based": 247,
          "printed_page": 246,
          "kind": "drawing",
          "width_px": 1244,
          "height_px": 674,
          "source_crop_normalized": [
            0.07,
            0.225,
            0.71,
            0.485
          ],
          "source_crop_pixels": [
            136,
            583,
            1380,
            1257
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L01_principle_1.jpg",
          "caption": "圆环梁、实体与离散截面、塔杆空间稳定原理（原书图a/b/c）",
          "page_pdf_1based": 249,
          "printed_page": 248,
          "kind": "principle",
          "width_px": 764,
          "height_px": 1024,
          "source_crop_normalized": [
            0.245,
            0.083,
            0.638,
            0.478
          ],
          "source_crop_pixels": [
            476,
            215,
            1240,
            1239
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L02",
      "title_cn": "普福尔茨海姆Enzauen III钢带人行桥",
      "title_en": "Footbridge in Enzauen III, Pforzheim",
      "year": 1991,
      "pages_pdf_1based": [
        259,
        260
      ],
      "printed_pages": [
        258,
        259
      ],
      "summary": "用极薄钢带直接承担桥面，使小跨径桥的悬索与加劲构件在形式上合一。",
      "key_facts": [
        "主跨50m，跨中垂度0.80m。",
        "书载钢板带截面480×40mm。",
        "桥面由分缝混凝土板压重覆盖钢带；圆弧鞍座控制钢带在桥台处的弯曲应力。",
        "板缝内氯丁橡胶与网状栏杆的摩擦参与振动耗能。",
        "书中6%坡度是当时项目设计条件，不能直接用作现行无障碍规范。"
      ],
      "category": "bridge",
      "evidence_scope": "几何与构造证据较完整，适合教学建模",
      "images": [
        {
          "path": "images/L02_photo_1.jpg",
          "caption": "Enzauen III钢带桥远景，极小垂度的桥面贴近水面",
          "page_pdf_1based": 259,
          "printed_page": 258,
          "kind": "photo",
          "width_px": 1641,
          "height_px": 910,
          "source_crop_normalized": [
            0.035,
            0.123,
            0.879,
            0.474
          ],
          "source_crop_pixels": [
            68,
            319,
            1709,
            1229
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L02_drawing_1.jpg",
          "caption": "纵断面及锚固区域，图示50m主跨与67.60m整体尺寸",
          "page_pdf_1based": 260,
          "printed_page": 259,
          "kind": "drawing",
          "width_px": 702,
          "height_px": 241,
          "source_crop_normalized": [
            0.519,
            0.109,
            0.88,
            0.202
          ],
          "source_crop_pixels": [
            1009,
            283,
            1711,
            524
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L02_detail_1.jpg",
          "caption": "钢带、分缝混凝土桥面板与网状栏杆近景",
          "page_pdf_1based": 260,
          "printed_page": 259,
          "kind": "detail",
          "width_px": 889,
          "height_px": 1089,
          "source_crop_normalized": [
            0.031,
            0.054,
            0.488,
            0.474
          ],
          "source_crop_pixels": [
            60,
            140,
            949,
            1229
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L03",
      "title_cn": "博斯特尔斜拱与钢带组合人行桥",
      "title_en": "Börstel Bridge, Bad Oeynhausen/Löhne",
      "year": 2000,
      "pages_pdf_1based": [
        262
      ],
      "printed_pages": [
        261
      ],
      "summary": "把局部混凝土受压拱放在连续受拉钢带下方，形成拱与悬垂带交替的步行曲线。",
      "key_facts": [
        "书中给出20m混凝土拱跨越小河。",
        "两侧钢带伸出长度分别25m与35m。",
        "预制混凝土板铺于金属钢带上，钢带贴合圆拱后向两岸延伸。",
        "为2000年Bad Oeynhausen/Löhne州园艺展建设。"
      ],
      "category": "bridge",
      "evidence_scope": "书内侧景清楚，细部尺寸须结合设计方资料",
      "images": [
        {
          "path": "images/L03_photo_1.jpg",
          "caption": "Börstel桥：斜置混凝土拱承托连续应力带的整体侧景",
          "page_pdf_1based": 262,
          "printed_page": 261,
          "kind": "photo",
          "width_px": 1746,
          "height_px": 869,
          "source_crop_normalized": [
            0.035,
            0.139,
            0.933,
            0.474
          ],
          "source_crop_pixels": [
            68,
            360,
            1814,
            1229
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L04",
      "title_cn": "斯图加特马克斯·埃特湖人行桥",
      "title_en": "Footbridge at Lake Max Eyth, Stuttgart",
      "year": 1989,
      "pages_pdf_1based": [
        253,
        254,
        255,
        256
      ],
      "printed_pages": [
        252,
        253,
        254,
        255
      ],
      "summary": "用后锚固悬索体系、斜吊索和起伏桥面回应两岸不同地形，并以预制吊装避开河道支架。",
      "key_facts": [
        "书载最大跨度114m，塔高24m。",
        "主桥采用后锚固悬索体系，交叉的斜吊索位于主缆与桥面之间。",
        "12个每个长8m的混凝土预制单元在岸上制作后逐一吊装。",
        "书中对比过连续梁与自锚悬索方案，强调通航河道中搭支架不可行。"
      ],
      "category": "bridge",
      "evidence_scope": "主桥平立面与施工顺序完整",
      "images": [
        {
          "path": "images/L04_photo_1.jpg",
          "caption": "Max Eyth湖人行桥的主缆、斜吊索与起伏桥面",
          "page_pdf_1based": 253,
          "printed_page": 252,
          "kind": "photo",
          "width_px": 1757,
          "height_px": 1099,
          "source_crop_normalized": [
            0.039,
            0.055,
            0.943,
            0.479
          ],
          "source_crop_pixels": [
            76,
            143,
            1833,
            1242
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L04_drawing_1.jpg",
          "caption": "平面与立面：两岸曲线路径、114m主跨及双塔布置",
          "page_pdf_1based": 254,
          "printed_page": 253,
          "kind": "drawing",
          "width_px": 1533,
          "height_px": 254,
          "source_crop_normalized": [
            0.078,
            0.209,
            0.867,
            0.307
          ],
          "source_crop_pixels": [
            152,
            542,
            1685,
            796
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L04_construction_1.jpg",
          "caption": "悬索桥预制桥面单元吊装顺序图",
          "page_pdf_1based": 256,
          "printed_page": 255,
          "kind": "construction",
          "width_px": 467,
          "height_px": 462,
          "source_crop_normalized": [
            0.512,
            0.171,
            0.752,
            0.349
          ],
          "source_crop_pixels": [
            995,
            443,
            1462,
            905
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L05",
      "title_cn": "基尔Hörn三折叠人行桥",
      "title_en": "Kieler Hörn Folding Bridge",
      "year": 1997,
      "pages_pdf_1based": [
        263,
        264,
        265,
        266
      ],
      "printed_pages": [
        262,
        263,
        264,
        265
      ],
      "summary": "在通行与通航状态之间改变结构几何，将活动机构作为桥梁设计的主要内容。",
      "key_facts": [
        "书载连接栈桥总长120m。",
        "正文称可折叠区跨度26m、桥面宽5m；侧栏概况另写25m，存在书内取整差异。",
        "桥面在三分点附近设置铰，可形成三段折叠。",
        "折叠驱动通过缆索与门架协同，书载完整开启或关闭约2分钟。",
        "收拢后的桥面迎风面积减少，是活动状态设计需一起处理的条件。"
      ],
      "category": "movable_bridge",
      "evidence_scope": "活动机构线图完整；本期作案例比较，非机械计算模型",
      "images": [
        {
          "path": "images/L05_photo_1.jpg",
          "caption": "基尔Hörn折叠桥开启状态，三段桥面与门架折叠",
          "page_pdf_1based": 263,
          "printed_page": 262,
          "kind": "photo",
          "width_px": 1577,
          "height_px": 1032,
          "source_crop_normalized": [
            0.066,
            0.081,
            0.877,
            0.479
          ],
          "source_crop_pixels": [
            128,
            210,
            1705,
            1242
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L05_drawing_1.jpg",
          "caption": "折叠机构的静力状态、初始转动与大角度运动图",
          "page_pdf_1based": 265,
          "printed_page": 264,
          "kind": "drawing",
          "width_px": 1334,
          "height_px": 1721,
          "source_crop_normalized": [
            0.16,
            0.09,
            0.846,
            0.754
          ],
          "source_crop_pixels": [
            311,
            233,
            1645,
            1954
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L05_sequence_1.jpg",
          "caption": "折叠桥由开启到完全折叠的三个状态照片",
          "page_pdf_1based": 264,
          "printed_page": 263,
          "kind": "sequence",
          "width_px": 1757,
          "height_px": 402,
          "source_crop_normalized": [
            0.037,
            0.319,
            0.941,
            0.474
          ],
          "source_crop_pixels": [
            72,
            827,
            1829,
            1229
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L06",
      "title_cn": "杜伊斯堡内港弓背升降人行桥",
      "title_en": "Humpback Bridge across the Inner Harbor, Duisburg",
      "year": 1999,
      "pages_pdf_1based": [
        267,
        268,
        269
      ],
      "printed_pages": [
        266,
        267,
        268
      ],
      "summary": "通过小幅改变锚索长度与塔顶位置，使铰接桥面由低矢度变成高拱，释放通航净空。",
      "key_facts": [
        "书载主跨73m，四根塔杆各高20m、直径42cm。",
        "桥面最大拱起高度书载9.2m，约5分钟到达最高状态。",
        "四根背索的液压缸可伸缩最多3m；书举例塔顶水平移动约1.7m可使桥面拱高增加8.1m。",
        "14个预制混凝土板单元通过钢框、眼杆与铰接连接，形成可变形桥面链。"
      ],
      "category": "movable_bridge",
      "evidence_scope": "运动机制证据完整，宜后续专门建运动学模型",
      "images": [
        {
          "path": "images/L06_photo_1.jpg",
          "caption": "杜伊斯堡弓背桥正常与抬升状态对比",
          "page_pdf_1based": 267,
          "printed_page": 266,
          "kind": "photo",
          "width_px": 1543,
          "height_px": 1081,
          "source_crop_normalized": [
            0.145,
            0.054,
            0.939,
            0.471
          ],
          "source_crop_pixels": [
            282,
            140,
            1825,
            1221
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L06_drawing_1.jpg",
          "caption": "桥面低、中、高三个位置的端部铰接变形",
          "page_pdf_1based": 269,
          "printed_page": 268,
          "kind": "drawing",
          "width_px": 418,
          "height_px": 669,
          "source_crop_normalized": [
            0.329,
            0.081,
            0.544,
            0.339
          ],
          "source_crop_pixels": [
            640,
            210,
            1058,
            879
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L06_model_1.jpg",
          "caption": "原书展示的悬索抬升原理实体模型",
          "page_pdf_1based": 269,
          "printed_page": 268,
          "kind": "model",
          "width_px": 566,
          "height_px": 295,
          "source_crop_normalized": [
            0.324,
            0.361,
            0.615,
            0.475
          ],
          "source_crop_pixels": [
            630,
            936,
            1196,
            1231
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L07",
      "title_cn": "凯尔海姆莱茵—美因—多瑙运河曲线人行桥",
      "title_en": "Kelheim Footbridge across the Rhine–Main–Danube Canal",
      "year": 1987,
      "pages_pdf_1based": [
        249
      ],
      "printed_pages": [
        248
      ],
      "summary": "作为圆环梁思想的早期先例，把平面曲率转化为桥面承载机制。",
      "key_facts": [
        "原书配图标题称其为第一座圆环梁，Kelheim，1987。",
        "书中说明采用密实预应力混凝土曲梁，并与后续离散钢管—拉索截面作对比。",
        "本书此处只提供关联照片与原理说明，没有给出可独立复建的完整尺寸。"
      ],
      "category": "bridge_precedent",
      "evidence_scope": "关联先例，不能与尺寸完整工程资料等同",
      "images": [
        {
          "path": "images/L07_photo_1.jpg",
          "caption": "Kelheim早期圆环梁桥的曲线混凝土桥面底视",
          "page_pdf_1based": 249,
          "printed_page": 248,
          "kind": "photo",
          "width_px": 447,
          "height_px": 306,
          "source_crop_normalized": [
            0.657,
            0.083,
            0.887,
            0.201
          ],
          "source_crop_pixels": [
            1277,
            215,
            1724,
            521
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L07_photo_2.jpg",
          "caption": "Kelheim桥面、倾斜塔杆与单侧悬挂体系",
          "page_pdf_1based": 249,
          "printed_page": 248,
          "kind": "photo",
          "width_px": 447,
          "height_px": 671,
          "source_crop_normalized": [
            0.657,
            0.219,
            0.887,
            0.478
          ],
          "source_crop_pixels": [
            1277,
            568,
            1724,
            1239
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L08",
      "title_cn": "奥伯豪森Ripshorst莱茵—黑尔讷运河人行桥",
      "title_en": "Footbridge across Rhine–Herne Canal at Haus Ripshorst, Oberhausen",
      "year": 1997,
      "pages_pdf_1based": [
        251,
        252
      ],
      "printed_pages": [
        250,
        251
      ],
      "summary": "把曲线悬索桥的受力形式上下倒置为受压空间钢拱，使桥面与拱同时在平面弯曲。",
      "key_facts": [
        "书载钢拱跨度77m；线图标注76.97m。",
        "截面图显示桥面宽3m。",
        "部分区段为居中短柱，部分区段为成对V形支撑；沿桥间隔约3m。",
        "水中倒影被用来展示拱与悬索的倒置关系。"
      ],
      "category": "bridge",
      "evidence_scope": "平立剖线图齐全，适合后续空间拱模型",
      "images": [
        {
          "path": "images/L08_photo_1.jpg",
          "caption": "Oberhausen Ripshorst空间钢拱与弧形桥面的下部视角",
          "page_pdf_1based": 252,
          "printed_page": 251,
          "kind": "photo",
          "width_px": 1765,
          "height_px": 1084,
          "source_crop_normalized": [
            0.041,
            0.053,
            0.949,
            0.471
          ],
          "source_crop_pixels": [
            80,
            137,
            1845,
            1221
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L08_drawing_1.jpg",
          "caption": "桥面截面、空间钢拱立面及弧形平面",
          "page_pdf_1based": 252,
          "printed_page": 251,
          "kind": "drawing",
          "width_px": 630,
          "height_px": 990,
          "source_crop_normalized": [
            0.43,
            0.495,
            0.754,
            0.877
          ],
          "source_crop_pixels": [
            836,
            1283,
            1466,
            2273
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L08_reflection_1.jpg",
          "caption": "水中倒影将悬索与拱的倒置关系直观呈现",
          "page_pdf_1based": 252,
          "printed_page": 251,
          "kind": "reflection",
          "width_px": 605,
          "height_px": 387,
          "source_crop_normalized": [
            0.101,
            0.499,
            0.412,
            0.648
          ],
          "source_crop_pixels": [
            196,
            1293,
            801,
            1680
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L09",
      "title_cn": "罗斯托克会展厅木网格筒拱",
      "title_en": "Trade Fair Hall, Rostock",
      "year": 2002,
      "pages_pdf_1based": [
        182,
        183,
        184
      ],
      "printed_pages": [
        181,
        182,
        183
      ],
      "summary": "用等规格短木板组成Zollinger菱形网格，展示标准化构件如何形成连续曲面和大跨空间。",
      "key_facts": [
        "木筒拱跨度65m，屋盖拱高9.5m，长度165m。",
        "书载胶合木板宽20cm、高75cm。",
        "菱形节点由两根中断杆与一根连续杆交汇，原书附节点及网格原理。",
        "对桥梁可借鉴模块化杆件、节点表达与从直杆生成曲面的设计逻辑。"
      ],
      "category": "roof_reference",
      "evidence_scope": "跨领域借鉴案例，不作为桥梁工程参数来源",
      "images": [
        {
          "path": "images/L09_photo_1.jpg",
          "caption": "Rostock会展厅菱形木网格筒拱室内整体",
          "page_pdf_1based": 182,
          "printed_page": 181,
          "kind": "photo",
          "width_px": 1763,
          "height_px": 1086,
          "source_crop_normalized": [
            0.042,
            0.054,
            0.949,
            0.473
          ],
          "source_crop_pixels": [
            82,
            140,
            1845,
            1226
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L09_drawing_1.jpg",
          "caption": "Zollinger菱形网格杆件编排与节点原理",
          "page_pdf_1based": 183,
          "printed_page": 182,
          "kind": "drawing",
          "width_px": 770,
          "height_px": 508,
          "source_crop_normalized": [
            0.482,
            0.185,
            0.878,
            0.381
          ],
          "source_crop_pixels": [
            937,
            480,
            1707,
            988
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L09_detail_1.jpg",
          "caption": "菱形木网格构件与节点近景",
          "page_pdf_1based": 183,
          "printed_page": 182,
          "kind": "detail",
          "width_px": 1755,
          "height_px": 1454,
          "source_crop_normalized": [
            0.036,
            0.397,
            0.939,
            0.958
          ],
          "source_crop_pixels": [
            70,
            1029,
            1825,
            2483
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    },
    {
      "id": "L10",
      "title_cn": "汉堡中心汽车站镰刀形悬挑屋盖",
      "title_en": "Central Bus Station, Hamburg",
      "year": 2003,
      "pages_pdf_1based": [
        185,
        186
      ],
      "printed_pages": [
        184,
        185
      ],
      "summary": "圆环梁原理从曲线桥面扩展到单侧支承屋盖，以曲率承担悬挑荷载形成的力偶。",
      "key_facts": [
        "书载屋盖玻璃面积4000㎡，钢梁与柱的整体高度约12m。",
        "地下地铁线路约束使屋盖柱列只能位于一侧。",
        "书中概况写最大跨度200m，平面线图标注188.40m；两者不是同一精确尺寸，不应混用。",
        "从主梁伸出不同长度的悬挑梁，玻璃通过檩条点式支承。"
      ],
      "category": "roof_reference",
      "evidence_scope": "适合与L01的圆环梁机制并列比较",
      "images": [
        {
          "path": "images/L10_photo_1.jpg",
          "caption": "汉堡中心汽车站的镰刀形单侧支承悬挑玻璃屋盖",
          "page_pdf_1based": 185,
          "printed_page": 184,
          "kind": "photo",
          "width_px": 1769,
          "height_px": 1114,
          "source_crop_normalized": [
            0.039,
            0.055,
            0.949,
            0.485
          ],
          "source_crop_pixels": [
            76,
            143,
            1845,
            1257
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        },
        {
          "path": "images/L10_drawing_1.jpg",
          "caption": "屋盖横截面、平面与立面，含单侧柱及环形梁几何",
          "page_pdf_1based": 186,
          "printed_page": 185,
          "kind": "drawing",
          "width_px": 1297,
          "height_px": 374,
          "source_crop_normalized": [
            0.082,
            0.183,
            0.749,
            0.327
          ],
          "source_crop_pixels": [
            159,
            474,
            1456,
            848
          ],
          "source_page_image_pixels": [
            1944,
            2592
          ],
          "processing": "从PDF原始扫描图按矩形裁选；未生成、未重绘、未做色调修复",
          "rights": "原书摘图；仅随本地研究包，公开发布或出版需另行核实授权。"
        }
      ],
      "source_status": "直接目读用户提供书籍的选定扫描页；工程尺寸按原书记录，现代状态与规范另行核查。"
    }
  ]
}