丽水莲都灵山未来社区项目连体结构设计

Conjoined structure design of Lingshan future community project in Liandu District in Lishui

丽水莲都灵山未来社区37#、38#公寓式酒店为非对称连体高层建筑,顶部5~6层设置了连接体,下部一些楼层设有斜柱,局部楼层收进较多,导致结构非常不规则,属于超限高层建筑。以38#楼为例介绍该项目的抗震性能化设计情况,采用YJK和MIDAS Gen软件对整体结构进行了小震和中震弹性分析,采用SAUSG软件进行了中震和大震弹塑性分析,并对连接体、斜柱、楼板、节点等进行了专项分析。分析结果表明,大震作用下,连接体底部的型钢转换桁架和关键节点均保持弹性,桁架转换层的楼板出现了不同程度的损伤,其余楼层楼板基本无受压损伤;中震作用下,斜柱未出现损伤,大震作用下,个别斜柱出现轻微损伤;结构整体指标合理,损伤和耗能情况良好,能够满足预设的抗震性能目标。

No.37 and No.38 hotel service apartments of Lingshan future community in Liandu District in Lishui are asymmetric conjoined high-rise buildings.The connector is set on the top 5~6 floors,some inclined columns are set on the lower floors,and partial floors have large-size setbacks.This causes serious irregularities of the structure,and these two buildings belong to out-of-code high-rise building.Taking No.38 building as an example,the performance-based seismic design of the project was introduced.YJK and MIDAS Gen software were used to conduct elastic analysis of the whole structure under frequent and fortification earthquakes,SAUSG software was used to conduct elastic-plastic analysis under fortification and rare earthquakes,and special analysis was conducted on connectors,inclined columns,floor slabs,joints,etc.The analysis results show that the steel structure transfer truss and key joints at the bottom of the connector remain elastic under the rare earthquake,and the floor slab of the truss transfer floor is damaged to varying degrees,while the floor slabs of the other floors are basically free of compression damage.Under the action of fortification earthquake,the inclined columns are not damaged,and under the rare earthquake,some inclined columns are slightly damaged.The structure has reasonable overall indexes,good damage and energy dissipation,and can meet the preset seismic performance targets.