Experimental Study On Seismic Behavior Of Precast Concrete Hollow Template Shear Wall With Vertical Seams

Concrete shear wall built with precast two-way hollow slabs, which applies to housing industrialization, is aninnovated precast concrete shear wall. The behavior of vertical joint is an important factor of effecting the integrityand seismic behavior of the walls. This paper investigated the seismic behavior of assembled monolithic concreteshear wall built with precast two-way hollow slabs with vertical joint systematically. The primary research contentsand research findings are as followed:(1) The experimental study on mechanical behavior of the concrete shear wall built with precast two-wayhollow slabs with inner joints. Quasi-static tests were performed on one cast-in concrete shear wall and one concreteshear wall built with precast two-way hollow slabs, respectively. The effect of inner joint on the seismic behavior ofconcrete shear wall built with precast two-way hollow slabs was analyzed. It showed that the concrete shear wall builtwith precast two-way hollow slabs had the function of adaptive-slit, and brittle shear failure was avoided by verticalcracks occurring along the inner joints of the assembled monolithic concrete shear wall. The failure process ofassembled monolithic concrete shear wall transforms from integral wall to the combination of wall and columns.Consequently, ductility and energy dissipation capacity were improved; however, shear capacity was decreased.(2) The experimental study on the mechanical behavior of concrete shear walls built with two-way hollow slabswith vertical joint of various details. To study the mechanical behaviors of concrete shear walls built with two-wayhollow slabs with various details of vertical joint, three concrete shear walls with two-way hollow slabs with verticaljoint were quasi-statically tested under low cyclic lateral loading to analyze the effects vertical joints with differentdetails cause. The result showed that the concrete shear wall built with two-way hollow slabs with vertical joint hadadequate deformability, in terms of their failure characteristic and behaviors from integral wall to adaptive shear wallincluding two precast shear walls with inner joints. In order not to weak the cast-in concrete in the horizontal hollows,constructional measure of using wood to replace some of the cast-in concrete in the vertical joint could improve theenergy dissipation capacity of the shear wall.(3) The experiment study on seismic behavior of concrete shear walls built with two-way hollow slabs withvertical joint. Five concrete shear walls built with two-way hollow slabs with vertical joint that were designed to behigh flexible resistance and low shear resistance were tested under quasi-static cyclic loading. Insights were gainedfrom the critical structural configurations and design parameters in regard to the improved seismic performance. Itwas concluded from the result that the shear resistance of concrete shear walls built with two-way hollow slabs with vertical joint increased with the increase of axial compression and horizontal rebar ratio, while decreased with theincrease of shear span ratio. It also showed that the energy dissipation capacity can be enhanced by more horizontalrebar.(4) Numerical model of concrete shear walls built with two-way hollow slabs with vertical joint was built. Thenumerical model of concrete shear walls built with two-way hollow slabs with vertical joint was built by finiteelement softwareABAQUS. The analytical prediction and test result are in good agreement.(5) A calculation method for the prediction of the shear resistance of concrete shear walls built with two-wayhollow slabs with vertical joint was proposed.