Experimental Research On Seismic Behavior Of Top Story Joints With High-strength RC Z-shaped Columns

With the rapid development of the construction industry,Z-shaped column frame structure has been widely used,but currently,the researches on the behaviors of high-strength reinforced Z-shaped column are insufficient.Based on the experiment of frame joint with high-strength RC Z-shaped columns.Through the experimental data,the finite element software ANSYS was used to analyze the seismic performance of the Z-shaped column with high-strength reinforced concrete.First,cyclic loading tests were carried out on one specimens with high-strength reinforced concrete,there reveals crack developing situation and failure characteristics in joints area.Then,through the establishment of ANSYS analysis model,and comparing the numerical simulation results and test results,to ensure the reliability of finite element model.By changing the Z-shaped frame joint with high-strength RC frame column spacing of stirrups,concrete strength,leg height to section thickness ratio,depth of beam and other parameters,to analyze the effect of high-strength RC Z-shaped column of top story frame joint on seismic behavior.The research results show concrete strength and nodal stirrup ratio are the main factors that affect the seismic performance of high-strength RC Z-shaped columns,it also has different effects on the seismic performance of the Z-shaped column of top story frame joint by changing leg height to section thickness ratio and depth of beam.