摘要
以某三塔自锚式悬索桥为工程背景,建立三维有限元模型,通过调整缆索初应变确定恒载作用下的成桥线形,基于静力平衡状态进行模态分析得到三塔自锚式悬索桥的振型及频率。结构动力特性影响参数分析表明:主缆抗拉刚度、加劲梁竖向弯曲刚度、桥面恒载集度、矢跨比等参数对结构动力特性影响较大。
Based on a self-anchored suspension bridge with three towers,a 3D finited-element model is developed to establish its deformed equilibrium configuration due to dead loading.Starting from deformed configuration,a modal analysis is performed to provide the frequencies and mode shapes.Strutrural and material parametric studies show that： tension stiffness of cable,vertical bending stiffness of stringer,self-weight of deck and rise-span ratio play an important role in the dynamic characteristics of self-anchored suspension bridge with three towers.
出处
《地震工程与工程振动》
CSCD
北大核心
2010年第4期97-102,共6页
Earthquake Engineering and Engineering Dynamics
关键词
三塔自锚式悬索桥
动力特性
参数分析
self-anchored suspension bridge with three towers
dynamic characteristics
parametric studies
作者简介
房贞政（1949-），男，教授，主要从事预应力结构的研究．E—mail：zzfang@fzu．edu．cn
