郑州大学学报（工学版）2012，Vol.33Issue(1)：32-35,4.DOI:10.3969./j.issn.1671-6833.2012.01.008
连续多跨矮塔斜拉桥力学性能分析
Mechanics Properties Analysis for Continuous Multi-span Low Pylon Cable-stayed Bridge
摘要
Abstract
The 2nd Yellow River bridge in Kaifeng is a double plane prestressed concrete cable-stayed bridge with 7 low pylons and 8 spans. The bridge was taken as the object of study and mechanics properties analysis of it had been made by adopting finite element program Midas/civil. The results indicate that stay rabies undertake more vertical loads because of the bigger ratio between height of king pylons and spans of girder, so the height and internal force of the girder sections at supporting points can be decreased effectively; the internal forces and deformations of the girder display an characteristic as well as multi-span continuous beams, the whole sections of girder are all under compressive stress basically, axis force distribution is uniform, the positive bending moment appears at the supporting points of girder and it is larger than the hogging moment at the mid-spans; the stiffness of girder is large, because the deformation of girder gives priority to the smaller upwards vertical deformation; the king pylons only serve as a steering column for stay cables and force in longitudinal direction is smaller, the displacements at the top of pylons in the longitudinal direction of bridge is so small that in scale of medium spans, the scheme of low pylons cahle-stayed bridge can sovle the problem of stiffness of multi-span cable-stayed bridge; The tension forces of cables at both sides of each pylon increase gradually from inside to outside, the force of cables of side-span is largest, and the growth of cables stress under live loads is very small; the bridge under asymmetric loads is disadvantageous, the stress and deformation of control section of each members are all in the range of the standard of criterion and have great safety storage , the structure of bridge is reasonable under loads.关键词
多跨矮塔斜拉桥/有限元法/力学性能Key words
multi-span low pylon cable-stayed bridge/finite element method/mechanical properties分类
交通工程引用本文复制引用
王艳,谷定宇,陈淮..连续多跨矮塔斜拉桥力学性能分析[J].郑州大学学报（工学版）,2012,33(1):32-35,4.基金项目
河南省杰出人才计划资助项目(084200510003) （084200510003）
