【作者】 刘蕾；

【导师】 谢尚英；

【作者基本信息】 西南交通大学 ， 建筑与土木工程， 2013， 硕士

【摘要】 波形钢腹板PC组合箱梁是一种用波形钢腹板替代普通箱梁的混凝土腹板的新型钢—预应力混凝土组合结构,与普通混凝土箱梁相比,桥梁上部结构自重大约减轻了20%-30%,减少了下部结构工程量。近年来世界各地地震灾害频发,特别是我国2008年发生的四川汶川大地震和今年的雅安大地震都给我们带来了十分惨重的教训,作为生命线工程的桥梁的抗震性能也越发受到人们的重视。工程实践表明,中、大跨径的桥梁采用波形钢腹板PC箱梁结构能够减轻桥梁上部结构的重量,地震激励作用效果显著降低,抗震性能有一定提高。所以,波形钢腹板PC箱梁桥在地震多发区域的应用前景十分广阔。我们有必要对波形钢腹板PC连续刚构桥这类新型桥梁结构进行动力特性和地震响应的研究。本文的主要内容包括：(1)本文论述了波形钢腹板PC箱梁桥的发展概况及其特点,介绍了大跨度桥梁抗震分析方法及连续刚构桥抗震设计现状,归纳了桥梁结构地震反应分析方法。(2)在理论基础上以一座波形钢腹板PC连续刚构桥—大渡河桥为工程背景,利用Midas Civil结构分析软件,研究静力作用下的空间结构行为；进行了动力特性分析；分析了桩—土—结构相互作用对桥梁动力特性的影响,并与普通PC连续刚构桥作对比分析。(3)对比分析了反应谱法和动态时程分析法对该桥E1地震作用下的地震响应的结果,其中,反应谱法采用规范加速度反应谱作为输入的谱曲线,分别就顺桥向、横桥向、竖向以及三向组合作用分析得到了该桥位移及内力地震响应的一般规律；动态时程分析法则采用El-Centro波、Taft波以及由规范反应谱拟合而成的人工波对大渡河桥进行了时程反应分析,然后相互校核并对比分析了两种方法得出的计算结果,同时对比分析了波形钢腹板PC连续刚构桥与普通PC连续刚构桥的地震响应的差异。更多还原

【Abstract】 Corrugated steel web PC box girder is a new kind of steel-prestressed concrete composite structure, it use corrugated steel web alternative to the ordinary concrete web. Compared with ordinary concrete box girder bridge, the dead weight of bridge superstructure about reducing from20%to30%, it reducing the quantities of substructure. As the earthquake disaster happened frequently in recent years, especially the WenChuan earthquake of SiChuan which happened in2008and the Yaan earthquake of SiChuan happened in this year bringed disastrous lessons, now the bridge as a lifeline,its seismic capacity has been paid more and more attention. Engineering practice shows that medium-sized span or large span bridge with corrugated steel web PC box girder structure can reduce the weight of the bridge superstructure, so that the seismic excitation effect is significantly reduced and the seismic performance must be improve. So corrugated steel web PC box girder bridges can be widely used in earthquake-prone area. It is nessary to do research on seismic response and seismic performance of such a new bridge structure as corrugated steel web PC continuous rigid frame bridge.The main content of this paper includes:1、The development situation and the characteristics of corrugated steel web PC rigid frame bridges is discussed in this paper. Some methods of seismic analysis and continuous continuous rigid frame bridge seismic design on long-span bridge, concluded the method of seismic response analysis is introduced.2、Based on the theory, With the project background of a corrugated steel web PC continuous steel bridge-Dadu River Bridge, The space structural behavior of static force and dynamic behavior by Midas Civil is researched on in this paper. Then the effect of pile-soil-structure interaction on dynamic behavior is analysised. For comparative analysis with traditional PC continuous rigid frame bridge at the same time.3、In use of response spectrum method and dynamic response history analysis method, The seismic response in the level of E1is analyzed and compared the results. The response spectrum analysis used the standard acceleration response spectrum as the input spectrum curve, Then the general rule of the bridge displacement and stress seismic response in axial direction, transverse direction, vertical direction and3direction is analysed. The dynamic time history analysis on DaDu River bridge used the seismic waves of El-Centro, Taft and artificial wave fitted by the standard response spectrum, then checked and comparatively analyzed the results of the two methods. Comparatively analyzed seismic performance difference between the corrugated steel web PC continuous steel bridge and the traditional PC continuous steel bridge at the same time.更多还原