通孔灌浆连接预制混凝土加装电梯结构设计方法研究  

Research on Design Method of Precast Concrete Structures Retrofitting with Elevators Using Through-Hole Grouting Connection

作　　者：马泽峰 王平山 李承铭[1] MA Zefeng;WANG Pingshan;LI Chengming(East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200041,China)

机构地区：[1]华东建筑设计研究院有限公司,上海200041

出　　处：《结构工程师》2024年第2期192-201,共10页Structural Engineers

摘　　要：采用通孔灌浆连接的预制混凝土加装电梯结构可广泛适用于既有多层住宅加装电梯工程。介绍了此结构的体系构成、施工过程及结构关键尺寸,包括典型电梯井道尺寸、剪力墙最小厚度及连廊悬挑长度等;探讨了预制结构的多种拆分方案及起吊设备选型;复核了结构具体构造的设计依据。通过结构模型的性能指标、大震动力非线性分析等,详细论述了结构的整体受力性能。对悬挑连廊偏心影响、通孔内竖向通长钢筋设计、底层电梯井筒正截面性能化设计及底层井筒灌浆拼接面水平施工缝抗剪强度等结构设计的重、难点问题进行了专项论证。经与钢框架加装电梯结构的经济性对比可知,结构具备安全性、经济性及耐久性,符合绿色建筑的建造要求。随着规模化产品的推出,既有住宅加装电梯工程将逐步实现替代升级。The precast concrete structures retrofitting with elevators using through-hole grouting connection can be widely applied to the elevator addition project of existing multi-story residential buildings.This paper introduces the system composition,construction process and key dimensions of this structure,including typical elevator shaft dimensions,minimum thickness of shear walls,and overhang length of connecting corridor.It discusses various dismantling options of the precast structure and the selection of lifting equipment,and reviews the design basis of the specific structure.The overall force performance of the structure is discussed in detail through the performance index of the structural model and the nonlinear dynamic analysis under severe earthquakes.Special attention is given to important and difficult structural design issues,such as the influence of the eccentricity of the overhanging connecting corridor,the design of vertical through-length reinforcement in the through-hole,the performance design of the positive section of the elevator shaft on the ground floor,and the shear strength of the horizontal construction joint on the grouted splice surface of the shaft on the ground floor.An economic comparison with the steel frame elevator structure shows that the precast concrete structure has safety,economy and durability and meets the construction requirements of green buildings.With the launch of large-scale products,the project of retrofitting elevators to existing residences will gradually realize alternative upgrades.

关 键 词：装配式钢筋混凝土结构 加装电梯 通孔灌浆连接 悬挑连廊 

分 类 号：TU375[建筑科学—结构工程] TU857