摘要
推导了脉动风荷载作用下考虑桩-土-结构相互作用时高层建筑顺风向风振加速度响应的计算公式,通过算例说明桩-土-结构相互作用对结构顺风向风振加速度响应有明显的影响。一般而言,各参数变化对加速度响应的影响的幅度不同,在土中阻尼较小时,考虑相互作用后,结构的加速度响应要比不考虑桩-土-结构相互作用时大,即考虑了桩-土-结构相互作用后有可能增加结构风振时的不舒适度。因此,在高层建筑的风振舒适度设计中应当特别考虑到桩-土-结构相互作用的影响。
Considering pile-soil-structure interaction(PSSI),formula of downwind acceleration response is derived for a high rise building subected to fluctuating wind load.Numerical examples show that PSSI has evident effect on the downwind acceleration response of the building.Generally speaking,different parameter has different effect on acceleration response of tall building to wind-induced vibration.When the damping in the soil is small,the acceleration response of the structure considering PSSI may be greater than that of the structure without considring PSSI,which may increase the uncomfortableness of the structure.So more attention should be paid to the effect of PSSI in the design of tall builing on its comfortable level to wind-induced vibration.
出处
《振动与冲击》
EI
CSCD
北大核心
2006年第3期90-94,共5页
Journal of Vibration and Shock
基金
建设部科技项目(04-02-042)
苏州市科技项目(SS05011)资助
关键词
土木工程
桩-土-结构相互作用
风振
加速度响应
舒适度
civil engineering,pile-soil-structure interction,wind-induced vibration,acceleration response,comfortable level
