索、塔参数对三跨部分斜拉桥动力特性的影响分析

Analysis of effect of cable and pylon elements on dynamic characteristics of a three-span partly cable-stayed bridge

以国内首座公路三跨预应力混凝土部分斜拉桥为背景,建立基准有限元动力计算模型,通过参数敏感性分析,研究索、塔构件对该桥梁体系结构动力特性的影响规律。引入动力影响度概念,量化分析索、塔参数对三跨部分斜拉桥动力特性的影响程度。

Based on a three - span PC partly cable - stayed bridge earliest built in China, a standard finite element model for the bridge is set up in this paper. The effects of cable and pylon elements on dynamic characteristics of this type of bridges are studied from parameter sensitivity analysis. The concept of dynamic influence degree is introduced so as to quantitatively analyze the effect extent of cable and pylon elements on the dynamic behaviors of three - span PC partly Cable - stayed bridges.