文档介绍：摘要
此次设计的内容为南京汉中桥的设计。设计采用预应力混凝土简支T型梁桥,桥梁跨径设置为(2×30)m,双向六车道;单幅桥宽为13m,主梁为T型梁,;按后张法施工工艺制作主梁。
本文主要阐述了该桥的上部结构与下部结构的设计和计算过程。首先对主桥进行总体结构设计,拟定上部结构尺寸,然后对上部结构进行恒载和活载内力计算,内力组合,预应力钢束的估算和布置及预应力损失计算,再进行截面强度、应力验算,最后进行变形验算。具体包括以下几个部分:桥梁结构布置;截面结构各部分尺寸拟定;主梁作用效应计算;预应力钢束的估算及布置;预应力损失及有效预应力计算;截面强度验算;抗裂验算;持久状况构件的应力验算;挠度验算,横隔梁与行车道板计算。
接着进行桥梁下部结构的设计计算,主要有支座尺寸拟定与计算,钻孔灌注桩、双柱式桥墩的计算。对于下部结构的盖梁、墩、柱和桥台分别进行初步设计,然后计算其荷载效应,截面配筋与截面承载力计算。
关键词:预应力混凝土简支T梁桥、上部结构、下部结构、结构设计、荷载效应、验算
Abstract
The design of the contents of the design of Nanjing Hanzhong of prestressed concrete simply supported T - beam bridge,the bridge span is set to (2 × 30) m,two-way six-lane; single bridge width of 13m, the main beam for the T-beam, beam height of ; by post-Zhang construction method of making the main beam.
This paper mainly elaborates the design and calculation process of the upper structure and the lower structure of the bridge. First, the overall structure of the main bridge design, the size of the upper structure, and then the upper structure of the dead load and live load calculation, internal bination, prestressed steel beam estimation and layout and prestress loss calculation, and then section strength, stress Check, and finally the deformation check. Including the following parts: the layout of the bridge structure; the size of the cross-section of the structure of the preparation of the main beam effect calculation; prestressed steel beam estimation and layout; prestressed loss and effective prestress calculation; section strength check; Stress check of permanent ponents; deflection check, transverse beam and lane plate calculation.
Then the design and calculation of the lower part of the bridge are carried out. The calculation and calculation of the bearing size, the calculation of the bored piles and the double-column piers are mainly carried out. For the lower structure of the cover beam, piers, columns and abutment were preliminary design, and then calculate the load effect, sec