Research On Performance-Based Seismic Design Method Of High Performance Concrete Shear Wall Of Rectangular Section

At present,Chinese code for seismic design of buildings adopts the force-based design theory,and the seismic fortification objective of this method is ensuring life safety singly.It is verified that this method can avoid casualties under designed earthquake action to a large extent,but it fails to control the economic losses caused by earthquake effectively.Performance-based seismic design theory is put forward in the 1990s,overcomes some shortcomings of traditional force-based design theory.In this paper,the performance-based seismic design method of high performance concrete shear walls is discussed,and the prime content is described as follows:(1) Experimental investigation for the seismic performance of the 5 piece of high performance concrete shear wall of rectangular section is conducted.Based on the tests of 5 high-performance concrete shear walls,the load-displacement curve,the skeleton curve,the factors of ductility,carrying bearing capacity and seismic performance are studied.(2) The performance-based seismic design method is described.Code for seismic design of buildings adopts three levels and two stages that is structure don't damage in the small earthquake,repair in the moderate earthquake,can't collapse in the strong motion earthquake.According to the damage level,the performance of shear wall structure is divided into three levels:"serviceability,life-safety and collapse-prevention". Carrying bearing capacity and deformability is designed in the premise of satisfying the performance index.(3) The shear capacity of shear wall is studied.Base on the data of 41 piece of shear walls,Regression formula which is more reliability and accurate than code's formula is create for different calculation model and analysis the influencing factor. Readers can use it in practical situation.Regression formula is suggested as the main reference for amending shear formula of shear wall in the code.