摘要
某大型商业开发工程在塔楼间设置非对称且偏心的多层连体结构，使原本规则的单塔结构形成复杂多塔连体结构。为减轻地震作用时连体与塔楼共同振动导致塔楼地震力和扭转变形加大的不利影响，连体与塔楼间采用铅芯叠层橡胶隔震支座进行连接。采用两种程序进行小震弹性反应谱和地震波时程分析，通过比较单塔工况和多塔连体工况的楼层剪力和层间位移角来研究该结构的抗震性能。研究结果表明，由于铅芯叠层橡胶隔震支座的采用，多塔连体工况时各塔楼和连体结构的振动状态趋向于独立振动，相互影响程度小，且多塔连体工况时塔楼的地震响应比单塔工况时要小，减小幅度约为65％～95％，能较好地减轻塔楼在地震作用下的响应。
A complex multi-tower connected structure used for commercial development consists of unsymmetrical and eccentrically multi-story connecting bodies among several regular towers. In order to reduce the seismic forces and torsional deformation of the multi-tower structure due to resonance between connecting bodies and towers during the earthquake, lead core laminated rubber isolation bearings were used to connect the connecting bodies and towers. Seismic response spectrum analysis and time-history analysis under frequent earthquake were carried out using two different kinds of software and the seismic performance of the multi-tower structure was evaluated through the comparison of story shear and inter-story drift angle under single-tower condition and connected multi-tower condition. Results show that usage of lead core laminated rubber isolation bearings makes towers and connecting bodies vibrate independently and mitigates the interaction between towers and connecting bodies under connected multi-tower condition. Moreover, the seismic response of towers under connected muhi-tower condition is decreased to 65% to 90% of that under single-tower condition, which well proves the approach to suppress seismic response of towers.
出处
《建筑结构》
CSCD
北大核心
2014年第5期50-56,共7页
Building Structure
关键词
多塔连体结构
隔震支座
抗震性能
地震波时程分析
multi-tower connected structure
isolation bearing
seismic performance
seismic time-history analysis
