Experimental Study On Seismic Behavior Of A Novel Reinforced Concrete Low-Rise Shear Wall With Embedded Hollow Pipe Filler

The low-rise shear wall of which the height-width ratio is less than 1 often appears in practical engineering.The failure mode of the low-rise shear wall is fragile shear destruction under the lateral earthquake action,the seismic performance is poor,it should be avoided or taken improvement measures in practical engineering.At present,measures to improve the seismic behavior of low-rise shear wall are:restrictions on nominal shear stress,increase shear reinforcement,vertical seams or slits,embed steel and so on.The low-rise shear wall with vertical seams or slits achieved good results in improving the low-rise shear wall seismic performance,but the application of it in engineering is limited because of its construction complicated and ugly appearance after pouring.Reference to cast-in-situ concrete hollow floor structure and low-rise shear wall with vertical seams technology,a new type of lateral force resistant structure—the low-rise shear wall with hollow pipe embedded was put forward.The wall is divided into a number of mid-rise shear wall of which the height-width ratio is more than 1 by placing the hollow pipe filler in the wall.In this thesis,the experimental study on seismic behavior of low-rise shear wall with embedded hollow pipe filler were carried out,and the calculation formula of shear bearing capacity is established.The main contents are listed as follows:1.The experimental study on seismic behavior of 3 low-rise shear wall with embedded hollow pipe filler,1 slit low-rise shear wall and 1 ordinary low-rise shear wall subjected to low-cyclic load were carried out.The influence of height-width ratio on seismic performance was mainly analyzed.2.Based upon the experimental study,hysteresis curves,skeleton curves,bearing capacity,ductility,stiffness and its degeneration process,energy dissipation and failure characteristics of the specimens were systematically analyzed.3.The finite element analysis of the 5 specimens of this test were carried out by the finite element analysis software of ABAQUS,and the results of nonlinear analysis were compared with the experimental results.4.According to its failure features and experimental results,the calculation formula of shear bearing capacity is established.The main conclusions of the study:1.Low-rise shear wall with embedded hollow pipe filler is similar with slit low-rise shear wall,which can effectively improve seismic performance of low-rise RC shear wall.2.In the same condition,with the increase of height-width ratio of wall-columns,seismic performance of low-rise shear wall was much better.3.The Working Mechanism of low-rise shear wall with embedded hollow pipe filler was preliminary discussed,the calculation formula of shear bearing capacity is established and the calculation results are in good agreement with the test results,which provides references for engineering design.