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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。
In order to accurately analyze the seismic response of a super-large-scale reticulated shell structure and to evaluate the seismic performance of the structure, the time-dependent analysis method is used to analyze the spatial coherence and traveling wave effects, the soil-structure interaction and the cumulative damage effects of materials The Influence of 800 m Span Reticular Shell Structure. The results show that all the factors have an impact on the seismic performance of the super-long reticulated shell. By comparing the seismic responses of the structures under multi-input and consistent input, it is found that the multi-input increases the internal forces of the surrounding members and the center of the structure The internal force of the rod tends to decrease, which also causes the failure of the structure to take place ahead of its periphery and changes the failure mode of the structure, which seriously weakened the seismic capacity of the structure. The soil-structure interaction and the material damage accumulation will all vary to different extents And the seismic response of the structure is increased. The soil-structure interaction amplifies the seismic response of the structure, while the material damage cumulative effect increases significantly when the seismic intensity is high.