建筑结构学报2024，Vol.45Issue(6)：25-38,14.DOI:10.14006/j.jzjgxb.2023.0463
考虑土-结构相互作用的超高层结构地震非线性分析
Seismic nonlinear analysis of supertall structures considering soil-structure interaction
摘要
Abstract
In existing dynamic elasto-plastic analysis of supertall structures,rigid foundation assumptions are commonly adopted,neglecting the influence of soil-structure interaction.To investigate the effects of soil-structure interaction on supertall structures,a refined three-dimensional nonlinear finite element model of soil-foundation-superstructure was established and dynamic elastoplastic analysis of a 366m supertall tower in case of rare earthquakes was conducted.A one-dimensional equivalent linearization analysis based on the engineering site conditions was first conducted to capture the seismic response of the soil layers.Subsequently,the wave propagation method was utilized to resolve seismic wave input issues in the three-dimensional soil layers and then the accuracy of the adopted approach was validated.The results indicate that the natural period of the tower increases compared with the rigid foundation assumption when considering soil-structure interaction.Under the estimated rare seismic action,considering soil-structure interaction leads to a reduction in the overall seismic response of the tower.The inter-story drift angles of the tower increase in the lower zone and decrease in the higher zone,with the maximum inter-story drift angle in the higher zone decreasing,exhibiting a trend that the deformation transfers to the bottom.The damage to the walls in the higher zone of the tower is alleviated,and the overall degree of stiffness degradation in the structure is reduced.Additionally,the base shear and overturning moments decrease when soil-structure interaction is considered.Individual locations of the tower's mega-columns experience increased internal forces,highlighting the potential risk of neglecting the effects of soil-structure interaction.The proposed method comprehensively considers the influence of site soil,providing a more realistic simulation of the seismic response of supertall structures.关键词
超高层结构/土-结构相互作用/一维场地分析/黏弹性边界/弹塑性分析Key words
supertall structure/soil-structure interaction/one-dimensional site response analysis/viscoelastic boundary/elasto-plastic analysis分类
建筑与水利引用本文复制引用
潘玉华,王翠坤,时继瑞,陈才华,邱盛源,马明,崔明哲,董皓..考虑土-结构相互作用的超高层结构地震非线性分析[J].建筑结构学报,2024,45(6):25-38,14.基金项目
国家重点研发计划项目(2022YFC3801200),中国建筑科学研究院有限公司科研项目(20220122330730017),中建研科技股份有限公司科研项目(20221902970730032). （2022YFC3801200）
