耐震时程法在高墩刚构桥抗震分析中的应用

发布时间：2018-05-09 20:13

本文选题：耐震时程法 + IDA　；参考：《防灾减灾工程学报》2017年02期

【摘要】：耐震时程法是一种新的基于时域的动力弹塑性抗震分析方法,与其他抗震方法相比,耐震时程法在大型复杂结构非线性分析时极具优势。以一座典型高墩刚构桥为例,介绍了耐震时程法的概念、基于桥梁抗震规范反应谱的耐震时程波生成方法及其在桥梁抗震分析中的应用,并且提出了符合高墩桥梁实际的计算Park-Ang损伤指数加权系数的方法。结果表明:耐震时程法预测柔性桥梁结构地震响应是合理的,宏观上表现为传统非线性分析响应的均值;耐震时程法分析时输入结构的能量与中等持时的天然波能量相比偏大,评估桥梁地震损伤时较为保守;耐震时程法用于设计初期桥梁方案比选时,只需1次非线性分析即可高效评估不同桥型抗震性能。
[Abstract]:Seismic time history method is a new time domain based dynamic elastoplastic seismic analysis method. Compared with other seismic methods, seismic time history method has an advantage in nonlinear analysis of large and complex structures. Taking a typical rigid frame bridge with high piers as an example, this paper introduces the concept of seismic time history method, the generation method of seismic time history wave based on the seismic code response spectrum of bridge and its application in the seismic analysis of bridges. A method for calculating the Park-Ang damage exponent weighting coefficient is put forward in accordance with the actual condition of the bridge with high piers. The results show that it is reasonable to predict the seismic response of flexible bridge structure by seismic time log method, which is shown as the mean value of the traditional nonlinear analysis response macroscopically, and the energy of input structure is larger than that of natural wave energy in medium duration. It is conservative to evaluate the seismic damage of bridges, and the seismic resistance log method can be used to evaluate the aseismic performance of different bridge types efficiently by only one nonlinear analysis.
【作者单位】：交通运输部公路科学研究所;北京工业大学工程抗震与结构诊治北京市重点实验室;吉林省交通科学研究所;温州市高速公路工程有限公司;
【基金】：国家自然科学基金项目(51378037;51378039;91315301-03)资助
【分类号】：U442.55;U448.23

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