文档介绍：华中科技大学硕士学位论文
摘要
当今世界桥梁飞速发展随着斜拉桁架 T构斜拉桁架连续梁斜拉桁架连续刚
构三种桥型的建设在我国桥梁中已形成了一个全新的结构体系----斜拉桁架预应力
混凝土结构体系卡子湾大桥结构型式为斜拉桁架连续刚构体系其特点是把刚度较
小的杆件组合集成为刚度较大的结构体系以预应力混凝土刚性拉杆代替斜拉桥柔性
钢索国外在上世纪 80 年代初就在研究和发展这一结构型式并被认为是发展大跨
度预应力混凝土桥梁结构很有潜力的一种结构型式
本文应用大型有限元软件对卡子湾大桥三维实体模型进行分析计算左桥
合拢前在预应力和重力组合作用下的应力状况进行左桥和整桥的模态分析最后分
析左桥在人工地震波作用下的动力时程反应
在大桥的地震时程反应分析中一般选择著名的波波和国内的天津波
等进行适当调整作为输入波形但这些地震波不能和当地估计的地震三要素很好的
吻合本文使用三角级数法生成了人工地震波这种地震波考虑了场地条件传播途
径震源距离震级等因素的影响能较好的符合当地环境
本文详细描述了左桥在纵向和横向人工地震波作用下的位移时程反应加速度时
程反应和剪应力时程反应通过对计算结果深入分析和论证得到了一些桥梁受地震
影响的有意义的结论为桥梁设计及改进提供了理论依据同时也指出了存在的问题
及进一步的研究方向
关键词混凝土桥人工地震波地震时程反应分析, 斜拉桁架连续刚构体系
三维实体模型
I
华中科技大学硕士学位论文
Abstract
Nowadays theories on bridge develop soon. With the development of inclined pull
truss T structure, inclined pull consecutive beam and inclined pull consecutive truss, a new
structure system e into being in our country, which is the inclined pull truss initial
concrete structure system. The bridge of Kazi gulf is the structure pattern for inclined pull
consecutive truss, bines some small poles gather to e a big structure
system, and replaces inclined pull steel wire by initial concrete rigid pull pole. Abroad in the
beginning of 80's in last century, this structure pattern had been studied and developed, and
believed that it was a potential structure very much to develop big span initial concrete
bridge.
This paper applies a software ANSYS to calculate the bridge of Kazi gulf in three-
dimensional entity model, compute the left bridge under the initial and the gravity before
gather together, carry on left bridge and the whole bridge’ mode analyses, finally analyze
the left bridge under artificial seismic waves.
Under the earthquake-respond analyze, the imported wave often use some adjusted
waves of EI wave, Taft wave and local Tianjin etc, but these earthquake waves are not good
to fit three main factors of earthquake locally estimated together. Here uses the triangle
series method to make artificial seismic wave