摘要
采用数值方法对群桩-承台体系的动力阻抗进行了分析.根据两个不同规模的群桩-承台体系的动力阻抗计算结果,发现在结构抗震所重点关注的低频段,群桩-土体-承台的动力相互作用与频率的相关性较小,因此可采用群桩-承台的静力相互作用关系代替其动力相互作用关系计算群桩-承台体系的动力阻抗.文中通过若干算例近似得到了群桩-承台的静力相互作用关系,并给出了利用群桩和承台的动力阻抗计算群桩-承台体系水平、摇摆和水平-摇摆耦合动力阻抗的简化计算公式.
In this paper, numerical procedures are first adopted to analyze the impedance of pile group-slab system. Based on the calculated impedance of two pile group-slab systems with different configurations, it is found that the dynamic interaction in the pile group-soil-slab system has low frequency dependence during the low-frequency vibration that is most concerned in the aseismatie design, so that, in the calculation of impedance of the pile group- soil-slab system, the dynamic interaction can be replaced by the static interaction. Based on the above-mentioned results, the static interaction in the pile group-slab system is then obtained via illustrations, and some simplified formulae for calculating the lateral, rocking and cross-lateral-rocking impedances of the system are presented.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第3期111-116,131,共7页
Journal of South China University of Technology(Natural Science Edition)
关键词
桩基
承台
动力相互作用
动力阻抗
pile foundation
slab
dynamic interaction
impedance
