斜入射地震波下单层球面网壳土-结构相互作用及其地震响应分析

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摘要为分析斜入射地震波下单层球面网壳土-结构相互作用（SSI）及其地震响应，采用等效节点力实现地震波输入，通过粘弹性人工边界处理无穷远辐射条件，分析了地震波类型、土体参数、入射角度等因素对单层球面网壳结构的土-结构相互作用及其地震响应影响。结果表明：单层球面网壳结构在地震波入射一侧出现翘起，网壳总体沿入射方向发生旋转，P波(primary wave)斜入射时支座位移差最大达0.514m，为网壳跨度的1/250。P波斜入射时，软弱土情况下网壳顶点位移比中硬土和中软土大，顶点位移随入射角增大呈现先增大后减小的趋势；SV波(secondary wave)入射时，中软土情况下网壳顶点位移比中硬土和软弱土大，顶点位移随入射角增大而增大。斜入射地震波下，考虑土-结构相互作用后网壳顶点位移增幅最大达5.5倍，网壳外圈位移增幅大于网壳跨中增幅。

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	韩庆华1
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	王月3
	芦燕1
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	李亚明4
	薛原5

关键词 ：单层球面网壳结构, 土-结构相互作用, 斜入射P波, 斜入射SV波, 粘弹性人工边界

Abstract：To study the soil-structure interaction (SSI) and seismic response of single-layer reticulated dome under oblique incident wave, the equivalent nodal force and viscous-spring artificial boundary was used. The results show that the reticulated dome tilts at the seismic wave incident side and rotates along the incident direction. The maximum support displacement difference reaches 0.514m under oblique incident P-wave, which is 1/250 of the span. The vertex displacement in soft soil is larger than that in medium hard soil and medium soft soil, and first increases then decreases with the increase of incident angle under oblique incident P-wave. The vertex displacement in medium soft soil is larger than that in medium hard soil and soft soil, and increases with the incidence angle increasing under oblique incident SV-wave. Under oblique incident seismic waves, the maximum vertex displacement increase is 5.5 times after considering soil-structure interaction, and the displacement increase at the outer ring of reticulated dome is greater than that at the middle span.

Key words： single-layer reticulated dome soil-structure interaction oblique incidence of P-wave oblique incidence of SV-wave viscous-spring artificial boundary

收稿日期: 2022-11-15 出版日期: 2024-02-15

引用本文:

韩庆华1,2,3，王月3，芦燕1,2,3，李亚明4，薛原5. 斜入射地震波下单层球面网壳土-结构相互作用及其地震响应分析[J]. 振动与冲击, 2024, 43(3): 255-264.
HAN Qinghua1,2,3, WANG Yue3, LU Yan1,2,3, LI Yaming4, XUE Yuan5. Soil-structure interaction and seismic response analysis of single-layer reticulated dome under oblique incidence seismic wave. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(3): 255-264.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2024/V43/I3/255

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