公路路基截面参数对地震动力响应的影响分析

Analysis on Influence of Highway Subgrade Section Parameters on Seismic Dynamic Responses

基于有限元软件,采用D-P材料模拟路基填土,加载汶川地震波,对公路路基路面结构进行弹塑性瞬态动力学分析。分析了不同路基填土高度、路基边坡坡率及路基宽度等参数影响下的路基顶面动力响应。在给定参数的情况下,相比于位移响应而言,路基顶部加速度响应由路基截面尺寸的变化引起的变化幅度较小。

Wenchuan of highway Based on finite element software, D-P material is used to simulate subgrade fills, then loaded by seismic wave, transient dynamic analysis of elastic-plasticity in connection with pavement structure subgrade is carried out. This paper analyzes dynamic response at the top of subgrade under effect of parameters, such as filling height, slope ratio and subgrade width. When the parameters are given, compared to displacement response, acceleration response at the top of subgrade will change with subgrade section size to a small extent.