Design Method And Experimental Study On Out-of-plane Behavior Of Wall Panels In Tilt-up Building System

In recent years,with the rapid development of China’s manufacturing industry and logistics industry,the market demand for industrial plants and logistics warehouses is increasing.With the advantages of simplicity,economy,speed and durability,concrete tilt-up structure has become the most widely used structural system in factories and logistics warehouses in the United States.The concrete outer wall board of this system is constructed efficiently by the method of lying flat on site and pouring concrete,which saves a lot of vertical formwork and transportation costs.Tilt-up building system has a good application prospect in China.Research on the mechanical performance and design method of tilt-up wall panel is helpful to the application and popularization of the system in China.Tilt-up panel usually has a large Height-Thickness Ratio(about 30-50),in the actual engineering is mainly subjected to the earthquake and wind load generated by the out-of-plane distributed load.At present,the experimental research on the out-of-plane force of concrete wall panel and tilt-up building system in China is still in the initial stage.This paper designs the out-of-plane force test of full-size wall panel after investigating the relevant tests and theoretical research of tilt-up wall panel at domestic and overseas.In this experiment,a self-designed out-of-plane loading device was used to study the load-displacement curves of four full-size concrete tilt-up wall panel under eccentric vertical load and out-of-plane uniform load.In the experimental study,the effects of Height-Thickness Ratio,reinforcement arrangement type and eccentric axial load are mainly considered.Crack load and displacement,yield load and distribution are been tested,and analyzes the produced by the effect of P-Δ second order moment of the ratio of the total bending moment.In addition,the calculation and design method of tilt-up wall panel apply to ACI-318 specification is briefly introduced.Finally,this paper studies the method of ABAQUS simulation,which provides methods and ideas for the subsequent numerical analysis.