马家屯桥上部结构设计.docVIP

PAGE II PAGE I PAGE 40 摘要 本设计依据设计资料和行业规范，综合大学四年所学专业知识，对马家屯桥上部结构进行设计，该桥设计车速V=100Km/h。该桥全长120m，采用4跨等跨的预应力混凝土T形简支梁桥。设计的内容包括资料收集和桥型比选、主梁纵横断面设计、荷载及活载内力计算、配筋及安全验算等。桥梁上部结构对桥梁的安全性、经济性、美观性都有影响，需要认真设计计算。 在桥型选择和方案比选时在考虑到满足安全性、经济的因素及美观的要求后选择了T形简支桥梁。在主梁尺寸的设计中，采用了变截面的设计，这样桥型与荷载分布相匹配，既满足了使用的要求又节省了材料。 关键词：上部结构设计 ；T形简支梁桥；预应力；预制 ABSTRACT This design according to the design data and industry standard, comprehensive university four years learned professional knowledge, carries on the design to the Ma Jia Tun bridge superstructure. The bridge design speed V=100Km/h. The full length of the bridge is 120m, and the T shaped beam bridge with 4 span and so on is adopted.. Design content includes data collection and the bridge type selection, girder cross section design, load and live load internal force calculation, reinforcement and safety check and so on. The bridge superstructure has the effect on the safety, economy and beauty of the bridge, which need to be carefully designed and calculated. In the selection of bridge types and scheme comparison and selection of the considered to meet the safety, economic factors and the appearance of the chosen T shape simply supported bridge. Variable cross-section design is adopted in the design of the beam size, this bridge and the load distribution to match, both to meet the use and material saving. Keywords: upper structure design; T shaped simply supported beam bridge; prestress; precast 目录 TOC \o 1-3 \h \z \u 前言 1 1原始资料 2 1.1工程概述 2 1.2设计标准及指标 2 1.2.1桥面宽度 2 1.2.2车辆荷载标准 2 1.2.3设计抗震基本裂度 2 1.3地质资料及气候资料 2 1.3.1地质资料 2 1.3.2气候资料 2 2桥梁方案比选 3 2.1方案一 3 2.2方案二 3 2.3方案三 4 3总体布置及主梁的设计 5 3.1设计资料 5 3.1.1设计资料 5 3.1.2设计荷载 5 3.1.3材料及工艺 5 3.1.4设计依据 5 3.1.5基本数据表 6 3.2横断面布置 7 3.2.1主梁间距及主梁片数 7 3.2.2主梁跨中截面主要尺寸拟定 7 3.3横截面沿跨长的变化 10 3.4横隔梁的设置 10 4.主梁内力计算 11 4.1永久作用集度 11 4.1.1.预制梁自重 11 4.1.2.二期永久作用 12 4.2永久作用效应 13 4.3可变作用效应计算（修正刚性横隔梁法） 14 4.3.1.冲击系数和车道折减系数