Research on Design Method of Precast Concrete Structures Retrofitting with Elevators Using Through-Hole Grouting Connection
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.
precast reinforced concrete structureretrofitting with elevatorthrough-hole grouting connectionoverhanging corridor
国家科技期刊平台
NSTL
万方数据
