毕业设计论文贵溪大桥上部结构设计.doc

PAGE PAGE VIII 摘 要 贵溪大桥位于江西省贵溪市，跨越信江。本次设计的课题是贵溪大桥上部结构设计。对该桥的设计，本着“安全、经济、美观、实用”的原则，先拟定几个方案进行比选。最终，决定采用预应力混凝土简支梁桥为方案进行上部结构设计。设计桥梁跨度为6×36m，桥面宽度为19m，双向四车道。T形主梁采用预制安装。 设计过程如下：首先，确定主梁主要构造及细部尺寸，它必须与桥梁的规定和施工保持一致。其次，设计行车道板，计算恒载和汽车荷载内力组合。再次，计算主梁内力、计算预应力筋面积及其布置计算预应力损失，然后进行应力、抗裂性验算和主梁挠度与锚固区局部承压计算。再者，横隔梁的设计及其配筋，绘制影响线及计算内力。最后，就是桥面结构和支座的设计。 关键词：简支梁桥；预应力；挠度；抗裂性； Abstract Guixi bridge is located at Guixi,Jiangxi Province. The bridge across the river of Xin jiang . This design topic is the superstructure design of Guixi bridge, when designing the bridge, with the security, economic, aesthetic and practical principle, first , I came up with several programs and compared with them . Ultimately, I decided to adopt prestressed concrete beam bridge for the design of superstructure. The span of bridge is 216m, and the width of bridge is 19m Design process are as follows: first, designing the structure and detail size of main girders, it must be consistent with the rules and regulations of the construction . Secondly, designing the roadway , calculating constant load and automobile load combinations. Again, calculating the internal force, calculating prestressed girder and its layout area and the loss of prestress, then calculating the stress and the anti-cracking , deflection of girder and pressure of anchorage zone . Moreover, designing the horizontal partition beam and its reinforcement, drawing influence line and calculating the internal force. Finally , it is the design of the bridge deck and bearings. Keywords: the beam bridge; prestressing force; Deflection; The anti-cracking; 目录 TOC \o 1-3 \h \z \u 第一章 基本资料 1 1.1 概况 1 1.1.1 地质条件 1 1.1.2 水文条件 1 1.1.3 气象条件 1 1.2 主要设计技术标准 2 第二章 方案比选 3 2.1 比选方案的主要标准 3 2.2 方案编制 3 2.3 方案比选 4 第三章 主梁设计 5 3.1 设计资料 5 3.2 横截面布置 7 3.2.1 主梁间距和主梁片数 7 3.2.2 主梁跨中截面细部尺寸 8 3.3 梁毛截面几何特性计算 9 3.3.1 截面几何特性 9 3.3.2 检验截面效率指标ρ 11 第四章 行车道板计算 12 4.1 恒载及其内力 12 4.2 汽车荷载产生的内力 12 4.3 内力组合 14 第五章 主梁内力计算