Abstract: Taking Chengkou pedestrian suspension bridge as the research object, the response spectrum analysis was carried out by using ABAQUS. Three groups of artificial seismic waves were simulated by using trigonometric series method, and the artificial seismic waves which had the greatest impact on the structure were selected for time history analysis. The results were compared with the results of response spectrum analysis. The results show that: the most disadvantageous position of main cable and main beam occurs at the east pylon and middle span respectively; the pedestrian suspension bridge structure is soft and in the long period range in the response spectrum; the seismic excitation response is small, but the response of self-weight load is large, so the self-weight load must be considered when the response spectrum results are output; the results of the time history analysis are generally larger than those of response spectrum analysis, and the peak response value of internal force of pedestrian suspension bridge is in good agreement, while the peak displacement response deviation is mostly between 10% and 30%, and the coincidence degree basically meets the requirements of seismic code.

Key words: bridge engineering, pedestrian suspension bridge, artificial seismic wave, response spectrum method

摘要： 以城口人行悬索桥为研究对象，运用ABAQUS进行了反应谱分析；采用三角级数法模拟了3组人工地震波，选取其中对结构产生最大影响的人工地震波进行时程分析，并与反应谱分析结果进行了对比。研究表明：地震作用下主缆及主梁最不利位置分别发生在东侧索塔处和跨中；人行悬索桥结构柔软，在反应谱上处于长周期范围，地震激励反应较小，但自重荷载反应较大，在反应谱结果输出时必须考虑自重荷载；时程分析结果普遍比反应谱分析结果大，人行悬索桥内力响应峰值吻合较好，位移响应峰值偏差大部分在10%~30%内，吻合度基本满足抗震规范要求。

关键词: 桥梁工程, 人行悬索桥, 人工地震波, 反应谱法