Experimental Research On Press-Bending Behavior Of High-Strength Concrete Steel Composite Walls

With the increase of the height of tall buildings, the size of shear walls at the bottom is always very large due to enormous moment and shear. In order to increase usage space, high-strength materials and composite members are widely applied. Many researches on both high-strength concrete members and composite shear walls have been done, but the combination of them is hardly seen. This paper studied the press-bending behavior of high-strength concrete steel composite walls based on the experimental research and numerical simulation.The press-bending behavior of9high-strength concrete shear wall specimens with high axial compression ratio was studied by the test under low-frequency cyclic lateral loading. The specimens included reinforced concrete (RC) walls, steel reinforced concrete (SRC) walls, and steel plate-concrete composite (SPRC) walls. Based on the experimental results and data, the failure pattern, hysteretic properties and ductility of RC walls, SRC walls, and SPRC walls were studied. It is shown that embedded steel plate effectively improved the bearing capacity, and the ductility of SPRC walls can meet the design requirements when the axial compression ratio is lower than0.5. Through many kinds of reinforcing measures, the ductility of high-strength concrete steel composite walls could be improved.ABAQUS was adopted to set up finite element models of these specimens to analyze their performances with proper constitutive relationship. The analysis results were in accordance with test results.Based on experimental and analysis results, strength formula and some design suggestions of high-strength concrete steel composite shear walls were proposed.