论文部分内容阅读
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。
Seismic time history method is a new time-domain dynamic elasto-plastic seismic analysis method. Compared with other seismic methods, the seismic time history method is very advantageous in the nonlinear analysis of large and complex structures. Taking a typical high pier rigid frame bridge as an example, this paper introduces the concept of seismic time history method, the generation method of seismic time-history wave based on seismic response spectrum of bridge and its application in seismic analysis of bridge, A practical method of calculating Park-Ang damage index weighting factors. The results show that it is reasonable to predict the seismic response of the flexible bridge structure by the earthquake-resistant time-history method, and the average value of the response of the traditional nonlinear analysis is macroscopically. The energy of the input structure in the time-history analysis is compared with that of the moderately-timed natural wave Large, it is more conservative to evaluate the earthquake damage of bridges. When the seismic time history method is used in the comparison of the bridge schemes at the initial design stage, the seismic analysis of different bridges can be efficiently evaluated with only one nonlinear analysis.