既有多层住宅加装电梯不同结构体系分析研究

Research on Different Structural Systems of Installing Elevators for Existing Multi-Storey Residential Buildings

以上海某实际工程为案例,研究既有多层住宅加装电梯两种结构体系适用性,详细介绍钢框架、混凝土异形柱框架结构布置特点,对比两种不同结构体系主要性能指标、基础设计、电梯与既有多层住宅主体结构的连接构造方法,以及原有住宅新开门洞需要的结构加固处理措施。主要结论包括:1) 新增电梯结构独立,连廊部分通过电梯井道结构悬挑,避免新增结构对原有住宅主体结构的影响;2) 混凝土结构恒荷载、地震作用下基底剪力及倾覆力矩较钢结构大幅度提高;3) 基础设计应进行结构整体抗倾覆验算,桩数混凝土结构较钢结构数量增多;4) 电梯结构悬挑框架梁梁端与原有房屋构造柱采用构造连接措施加强。

Taking a practical project in Shanghai as a case,the applicability of two structural systems of in-stalling elevators for existing multi-storey residential buildings was researched.The structural characteristics of steel frame structure and concrete frame structure with specially shaped columns are introduced in detail.The main performance indexes,foundation design,and methods on connection construction between the added elevator and the residential building structure of two structural systems were compared.Retrofitting measures due to door openings on the wall of the residential building were performed.The research results are included:1)the structural systems need independence,and the corridor part is suspended through the elevator structure,avoiding the influence of new structural loads on the structure of the residential building;2)the dead load,base shear force and overturning moment of the concrete structure under earthquake are greatly improved compared with the steel structure;3)the anti-overturning check should be carried out in foundation design,and the pile number of the concrete structure increases compared with that of the steel structure;4)connection construction measures are adopted between the ends of can-tilever frame beams with the structural columns of the masonry residential building.