| Based on some limitations of the common practice of various types of insulation wall in the construction industry,this paper presents a new type of mold-free insulation shear wall.The mold-free shear wall mainly includes cast-in-place concrete,prefabricated concrete module(strength C25～C30),reinforced cage and insulation layer.The main feature of the wall is that the concrete module is prefabricated in the factory and transported to the construction site in accordance with the design requirements for assembly,which is used to be as a cast pouring concrete layer template,secondly the concrete prefabricated module is provided with holes,which inserted a drivepipe.Under the action of the connecting member,the concrete prefabricated modules on both sides cooperate with each other to bear the vertical and horizontal loads.In order to ensure the insulation effect of the wall,which use polystyrene board as an insulation layer.And the wall played well in the insulation and reduced the noise pollution.The wall have the property of capacity,insulation and sound insulation,which can meet the requirement of energy-saving design of modern building.In order to study the effect of different axial compression ratio on the seismic performance and the cooperative performance of the non-template insulation shear wall,pseudo-static tests were carried out on 3 pieces of insulation shear wall with axial compression ratios of 0,0.1 and 0.2.On basis of tests,the development and distribution of cracks in the prefabricated concrete template on both sides of the wall were observed and recorded,and the test data such as displacement ductility coefficient,hysteresis curve and skeleton curve of the specimen were also obtained.The test results can be summarized as follows:during tests the cracks developed and distributed uniformly in all 3 specimens,which showed good cooperative performance,and the concrete of corner all crushed substantially when the wall is broken.With the increase of the axial compression ratio,the cracking load of prefabricated concrete template increased gradually,and the position of the horizontal crack is gradually shifted downwards,the ultimate bearing capacity and stiffness increased while the ductility decreased.The damage mechanism of the mold-free shear wall under low cyclic loading is obtained by comprehensive analysis of the curves and failure modes:during the loading process,the prefabricated modules on both sides have good working ability with the cast-in-place concrete layer.When the wall is damaged,the prefabricated side template and the cast-in-place concrete layer do not appear to be dislocated.This study provides necessary scientific basis for further investigation on the failure mode and seismic performance of the wall. |
