大跨度斜拉桥的pushover分析

发布时间：2018-07-06 09:39

本文选题：非线性时程分析 + pushover　；参考：《辽宁工程技术大学学报(自然科学版)》2014年04期

【摘要】：为验证pushover方法对于大跨度斜拉桥的适用性,选用多种侧向载荷加载方式对具体斜拉桥进行分析,采用四条典型的地震波对结构进行动力时程分析.并将分析结果与时程分析结果进行了对比.Pushover方法较为简便,而非线性时程分析方法计算复杂、耗时长,在结构中应用并不广泛.结果表明,传统的均匀载荷分布模式的计算结果与时程分析结果对比存在误差,由于模态pushover分析方法和振型载荷分布模式考虑了高阶振型的影响,所得pushover曲线与时程分析所得的曲线基本吻合.说明pushover方法对结构进行抗震性能评估时,精度可以满足工程需要;选择合适的侧向载荷分布模式,可以有效提高pushover分析的精度.
[Abstract]:In order to verify the applicability of Pushover Method to long-span cable-stayed bridges, a variety of lateral load loading methods are selected to analyze concrete cable-stayed bridges, and four typical seismic waves are used to analyze the dynamic time history of the structure. The analysis results are compared with the time history analysis results and the.Pushover method is more simple and nonlinear time history analysis. The method is complicated and time-consuming, and it is not widely used in the structure. The results show that the calculation results of the traditional uniform load distribution model have errors compared with the time history analysis results. Because the mode pushover analysis method and the mode load distribution mode take into account the effect of the high order modes, the pushover curve and the time history analysis are obtained. The line is basically consistent. It shows that the pushover method can meet the needs of the engineering when evaluating the seismic performance of the structure, and the selection of the appropriate lateral load distribution mode can effectively improve the accuracy of the pushover analysis.
【作者单位】：大连大学材料破坏力学数值试验研究中心;
【基金】：国家自然科学基金资助项目(51108052)
【分类号】：U448.27

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