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1、Part 2 RC & PC beam bridge 第二篇 钢筋混凝土和预应力混凝土梁式桥Chapter 1 第一章Introduction of the beam bridge 梁式桥概述SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHENBRIDGE ENGRG PART IIChapter 1 Introduction of the beam bridge 梁式桥概述1.1 Classification 类型的划分（1）Classification based on the structural system按承重结构的静力体系划分Sim
2、ple supported beam bridge简支梁桥 Continuous beam bridge连续梁桥 Cantilever beam bridge悬臂梁桥SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHENDevelopment on the structure 结构体系的演变Simple supported beam 简支梁Span increasing 跨度增加qlql2/8ql2/8ql2/8SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHENContinuous beam 连续梁
3、Cantilever beam 悬臂梁1.1 Classification 类型的划分（1） Classification based on the structural system按承重结构的静力体系划分 （2）Classification based on the structural section按承重结构的截面形式划分n板桥n肋板式梁桥n箱形梁桥SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHENChapter 1 Introduction of the beam bridge 梁式桥概述Evolution of the sectio
4、n 截面形式的演变Solid slab实心板Slab with ribs肋板Slab with hollow空心板T beam T形梁Box girder箱梁Span increasing 跨度增加SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHENChapter 1 Introduction of the beam bridge 梁式桥概述武汉理工大学交通学院 制作：陈小佳Chapter 2第二章Outline on the design and construct of beam bridge 梁式桥设计要点与构造Part 2 RC & PC
5、 beam bridge 第二篇 钢筋混凝土和预应力混凝土梁式桥BRIDGE ENGRG PART II1 Elevation arrangement for beam bridge梁式桥的立面布置1.1 Simple-supported structure 简支体系1.1.1 Simple-supported slab bridge 简支板桥nHeight 建筑高度小nForm 外形简单，施工安装简便nSpan 跨径不宜过大Type 种 类Span 跨径（m）Thickness 板厚（m） Solid 实心板RC8m0.160.36Hollow slab装配式空心板RC6130.40.8PC
6、8160.40.7Dimension of Simple-supported slab 简支板的构造尺寸 SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1.1. Simple-supported structure 简支体系1.1.2 Simple-supported beam bridge 简支梁桥Type 种 类Span 跨径 l（m）Height 梁高（m）Prefabricated 装配式RC 820(1/111/18) l PC2040(1/151/25) lDimension of Simple-supported beam简支
7、梁的构造尺寸 SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1 Elevation arrangement for beam bridge梁式桥的立面布置R CSpan (m)10131620 Height (m)0.80.90.91.01.01.11.01.3 P CSpan (m)25303540 Height (m)1.251.451.651.752.02.3Standard dimension of simple-supported beam 标准图简支梁的构造尺寸 SCHOOL OF TRANSPORTATION, WUT PRO
8、DUCED BY：X J CHEN1.1. Simple-supported structure 简支体系1.1.2 Simple-supported beam bridge 简支梁桥1 Elevation arrangement for beam bridge梁式桥的立面布置1.2 cantilever beam system 悬臂体系1.2.1 RC cantilever beam bridge 钢筋混凝土悬臂梁桥T section T形截面h = (1/121/20) l H = (1.01.5)hBox girder 箱形截面h = (1/201/35) l H = (1.01.5)h
9、nSingle span with two cantilevers单孔双悬臂梁桥T section T形截面 lx=(0.30.4) l Box girder 箱形截面 lx=(0.40.6) lHhllxlxSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1 Elevation arrangement for beam bridge梁式桥的立面布置1.2 Cantilever beam system 悬臂体系nThree span with cantilevers and a hang Beamn三跨带挂梁单悬臂梁桥l1=(0.60.8)
10、l lg=(0.40.6) l h=(1/121/20) lg H=(1.51.8) hHhll1l1 lgSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1.2.1 RC cantilever beam bridge 钢筋混凝土悬臂梁桥1 Elevation arrangement for beam bridge梁式桥的立面布置1.2 Cantilever beam system 悬臂体系nMulti-span with double cantilevers and hang beams多跨带挂梁双悬臂梁桥 l1=(0.750.8) l l
11、g=(0.50.6) lll1 lgHhl lgSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1 Elevation arrangement for beam bridge梁式桥的立面布置1.2.1 RC cantilever beam bridge 钢筋混凝土悬臂梁桥T section T形梁 Box girder 箱形梁 h=(1/121/20) l h=(1/121/20) l H=(1.51.8) h H=(1.01.5) h1.2 Cantilever beam system 悬臂体系1.2.2 PC cantilever bea
12、m bridge 预应力混凝土悬臂梁桥PC cantilever beam bridge is more suitable for large span of more than 50m 跨度超过50m以上，采用预应力混凝土悬臂梁桥更合理。 l1=(0. 50.8) l h=(1/201/25) l lg=(0.20.4) l H=(1.01.5) h ll1 lgHhl lgSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1 Elevation arrangement for beam bridge梁式桥的立面布置1.2 Cantileve
13、r beam system 悬臂体系由于施工阶段的受力与结构使用状态下的受力的一致性， T形刚构桥常是经济的方案。n 全桥的T形单元尺寸尽可能相同， 以简化设计与施工；n T形刚构的布置应尽可能对称，以避免T形刚构的桥墩承受不平衡弯矩。SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1 Elevation arrangement for beam bridge梁式桥的立面布置1.2.3 PC rigid-frame bridge 预应力混凝土T形刚构桥1.2 Cantilever beam system 悬臂体系Structural arrangement of rigid-frame刚构的布置形式：SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1 Elevation arrangement for beam bridge梁式桥的立面布置1.2.3 PC rigid-frame bridge 预应力混凝土T形刚构桥1.2 Cantilever beam system悬臂体系T形刚构支点、跨中梁高与跨径的关系：n 带铰T形刚构 l100mH=(1/141/22) l
