Experimental Research On Seismic Behavior Of HR-EPS Module Shear Wall Under Different Shear Span Ratio

With the call of national construction, more and attention by the whole society ispaid for repeated use of resources, Polystyrene is widely applied in life because of itsvarious advantages. But it is not easy management, short of humans’ environmengtalprotection consciousness, discarding freely, which is easy to cause”white pollution”.New materials company transforms expandable polystyrene (referred to as EPS)cleverly, which is used in the construction industy as the template to makeenergy-saving and thermal insulation integrate. The EPS module system wasintroduced into China at an early time, but the application is not widely, especially inthe aspect of the application is less seismic. Although experts and scholars haveengaged in the research, but there is little about the theory basis of EPS module wall,they still need to do a lot of experimengts to enrich the existing seismic theory.Therefore, this paper conduct the low cyclic quasi-static test through the four surfaceEPS module of shear wall and a face ordinary shear wall speciments and use ABAQUSfinite element analysis software to simulate the seismic performance.1. The main content:(1) This paper selects shear span ratio and axial compressionratio of two control factors, a total of four surface module design of shear wall and oneface common shear wall, performance by low cyclic experiment to study the EPSmodule in the shear capacity of shear wall, and the displacement ductility, stiffnessdegradation and so on, and comparative analysis of the similarities and differenceswith the common shear wall;(2) The numerical simulation of finite element software,combined with the experiment data, put forward the EPS module of shear wall lateralstiffness and the formulae for calculating the shear bearing capacity for inclinedsection, and its applicability is validated with other relevant data.2. From the existing experimental phenomena and test data we can get thefollowing results:(1) Because of the influence of the core rib, module of shear wall inthe aspect of bearing capacity and ductility, stiffness degradation is different fromordinary shear wall, but still can show good seismic performance;(2) The test result shows that, shear span ratios for module shear wall which are1.63and2.45alsoproduce bending shear failure, which is similar to the common shear wall. and themodule shear wall with shear span ratio of2.45is more close to the common shearwall;(3) Within a certain range of the medium under the action of axial compressionratio, shear capacity of module shear walls decrease with the increase of shear spanratio, but marginally, while the ductility decreased, and the influence of shear spanratio on the seismic performance of the module wall is more obvious with the increaseof axial compression ratio;(4) Analysis is derived, the lateral stiffness of moduleshear wall that shear span ratio greater than1.5can take ordinary shear wall lateralstiffness of2/3;(5) Through the contrast calculation, module of oblique section shearbearing capacity of the shear wall still can use ordinary oblique section shear bearingcapacity formula of shear wall;(6) Through the comparison with existing data, wefound that the seismic performance of HR-EPS module shear wall is similar withinsulation bricks cast-in-situ bearing system.