摘要
丽泽金融商务区D10综合楼是呈反对称布置的一对弱连接框剪结构双塔高层建筑,与门式钢架门厅组成建筑群。高塔99m,比较规则;低塔70m,带长悬挑桁架;裙房3层,有长悬挑板,门厅带悬挂走廊。设计过程中针对弱连接裙房双塔结构的布置原则、长悬挑结构的加强方式及防连续倒塌设计、门式钢架门厅的舒适度控制,进行了细致分析,对一些关键构件明确了加强措施。此外,弱连接双塔底盘的计算地震剪力明显小于双塔底层的地震剪力之和,为保证安全度,采用SRSS方法对双塔底盘地震剪力进行加强性调整;长悬挑结构导致部分楼层框架承担的剪力超过25%,规范调整方法不再适用,采取针对性调整方法;软件对带V形支撑斜杆楼层的抗剪承载力计算方法有误,薄弱层判断失真,采取针对性计算方法。
Lize financial business district D10 complex-building is a pair of weak-link antisymmetric high-rise twin towers frame shear wall structures. The building group also contain a pair of portal frame structures as lobby. Higher one of the twin towers is 99 m high and regular in plane,another one is 70 m high which has a long-span cantilever truss. There is a three floors podiums with long-span cantilever slab. The corridors are designed to suspend from the portal frame lobby. A careful analysis has been carried out in layout principle of weak-link twin towers structure,strengthen method of cantilever structure,resistance to progressive collapse and the degree of comfort of corridors suspend from the portal frame lobby during design process. Furthermore,the calculated seismic base shear of weak-link twin towers structure is significantly less than the sum of two single towers,in order to ensure the safety of structure,an adjustment using SRSS method of seismic base shear has been carried out. The percentage of frame bearing shear of some floors are beyond 25% because of the long-span cantilever,targeted adjustment has been used instead of code adjustment. There are several bugs of analysis software in floor shear bearing capacity when V type brace existing,therefore,a specific analysis method was used to determine weak story.
出处
《建筑结构》
CSCD
北大核心
2016年第S2期29-35,共7页
Building Structure
关键词
弱连接框剪结构双塔
长悬挑桁架
双塔底盘地震剪力调整
防连续倒塌
舒适度
weak-link twin towers frame shear wall structure
long-span cantilever truss
adjustment of twin towers seismic base shear
resistance to progressive collapse
degree of comfort
