Analysis On The Mechanical Performance Of Reinforced Concrete Hollow Shear Wall And Design Suggestions

In response to the national policy of "A green four sections", the buildings of residence should actualize the industrialization and factorization to speed up the construction progress and reduce the cost. It will become the mainstream that the component of the construction will be produced in the factory and the assembled building will be the developing direction of the future residential system in our country. Based on the building requirements of indoor separate mode and the comfort,the assembled frame-shear wall, pure shear wall structure system will be more widely used in residential. As the main load-bearing component and envelop system of the residential assembled shear wall structure system, the wall is the breach of energy saving innovation. Above all, this paper puts forward a new type of residential structure system-assembled reinforced concrete hollow shear wall structure system.Hollow shear wall, which is formed by steel bar, concrete and air layer,will become a choice of the wall innovation. It can be used in the construction of mini high rise residential buildings in cities.At present, the research and test about the hollow shear wall is still solimited. The hollow shear wall hasn’t been widely used in actual engineering project yet, and the existing standards have no relevant provisions. In order to make the hollow shear wall structure be applied better in actual engineering, the following work has been carried out in this paper.1.Based on ABAQUS, a parameterized modeling method of hollow shear wall was proposed, and the feasibility of the analysis method is verified by being compared with experiments.2.Based on ABAQUS, three pieces square-hole shear walls model were established and their failure modes were analyzed.Their height to width ratio are1、1.5 and 2 respectively.The results shows that, the failure mode of the hollow shear wall was changed from shear failure to flexural failure with the increase of the height-width ratio, and the existence of the holes had little effect on the failure mode of the shear wall.3.Based on the damage morphologica analysis of hollow shear wall structure, changing the parameters of hollow shear wall: height- width ratio,strength grade of concrete, horizontal distribution reinforcement ratio, vertical reinforcement ratio, axial compression ratio, the form of the holes.The effects of different parameters on the mechanical properties and deformation behavior of hollow shear walls were studied.Specific conclusions are as follows:1)Depth-width ratio:Under the condition of the other five parameters were the same, the ductility of the hollow shear wall components increased with the increasement of high-width ratio, however, the shear capacity of the hollowshear wall was decreased.2)Strength grade of concrete: Under the condition that the other five parameters were the same, the higher the concrete strength grade was, the higher the shear bearing capacity of hollow shear wall components, when the strength grade of concrete was C40, the ductility of the hollow shear wall reached the maximum.3)Vertical reinforcement ratio: Under the condition that the other five parameters were the same, the greater vertical reinforcement ratio was, the higher shear bearing capacity of the hollow shear wall structure would have, the greater ductility it would get.4)Horizontal distribution reinforcement ratio: Under the condition that the other five parameters were the same, the larger horizontal distribution reinforcement ratio was, the higher capacity hollow shear wall components would have, the greater ductility it would get.5)The axial compression stress to strength ratio: Under the condition that the other five parameters were the same, the greater the axial compression ratio was, the greater the bearing capacity of hollow shear wall components would get, but the ductility of the hollow shear wall structure would decrease.6)The type of hole: Under the condition that the other five parameters were the same, compared with solid shear wall, the carrying capacity of the hollow shear wall reduced, but the ductility increased; The bearing capacity of shear wall with circular holes was slightly larger than that of the wall with squareholes and the ductility of the hear wall with circular holes was the best; holes had little influence on the trend of stiffness decreasement of shear wall structure.4.The reinforced concrete hollow shear wall and solid shear wall model were established respectively by Midas software. Under the same earthquake influence, compared with the solid shear wall, the self vibration cycle of the hollow shear wall structure increased. The hollow shear wall reduced the seismic effect and had a better seismic performance.5.Based on the above analysis, the reference and suggestion to the design of the hollow shear wall structure and the component have been put forward.