超大跨网壳结构在强震作用下的复杂效应影响研究

发布时间：2018-04-28 04:31

本文选题：超大跨网壳结构 + 空间相干性　；参考：《建筑结构学报》2016年09期

【摘要】：为准确分析超大跨网壳结构的地震响应,评估结构的抗震性能,采用时程分析法,分析了地震动空间相干性和行波效应、土-结构相互作用以及材料损伤累积效应等多因素对跨度800 m超大跨网壳结构的影响。结果表明:各因素对超大跨网壳结构的抗震性能均有影响;通过对比多点输入和一致输入下结构的地震响应,发现多点输入增大了结构周边杆件的内力,结构中心位置的杆件内力有减小的趋势,这也使结构的失效从其周边位置提前开展,改变了结构的破坏模式,严重削弱了结构的抗震能力;土-结构相互作用和材料损伤累积均会不同程度地增大结构的地震响应,其中土-结构相互作用放大了结构的地震动响应,而材料损伤累积效应在地震动强度较高时结构的地震动响应显著增大。
[Abstract]:In order to accurately analyze the seismic response of large span latticed shell structure and evaluate the seismic performance of the structure, the spatial coherence and traveling wave effect of ground motion are analyzed by time history analysis. The effects of soil-structure interaction and material damage accumulation on the structure with large span of 800 m are investigated. The results show that every factor has an effect on the seismic performance of the large span latticed shell structure, and by comparing the seismic response of the structure under multi-point input and uniform input, it is found that the multi-point input increases the internal force of the members around the structure. The internal force of the member at the center of the structure tends to decrease, which also causes the failure of the structure to be carried out in advance from its peripheral position, which changes the failure mode of the structure and seriously weakens the seismic capacity of the structure. Both soil-structure interaction and material damage accumulation increase the seismic response of the structure to varying degrees, in which the soil-structure interaction amplifies the seismic response of the structure. But the material damage accumulation effect increases the seismic response of the structure when the ground motion intensity is high.
【作者单位】：哈尔滨工业大学结构工程灾变与控制教育部重点实验室;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金重大研究计划集成项目(91315301),国家自然科学基金项目(51278152) “十二五”国家科技支撑计划(2015BAK17B03)
【分类号】：TU399

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