Study On Seismic Behavior Of Latticed Recycled Concrete Wall

The latticed concrete wall is a new structure system with the merits of heat preservation,environmental protection, load–bearing, light weight, earthquake resistance, utilizing industrialwaste, energy saving and rapid construction speed, etc. It is combined by the standard sizeexpansive polystyrene granule cement (EPSC) that produced the standard size in the plant, andthen insert reinforcements into the holes of vertical and horizontal respectively, and latticedconcrete frame in the casting of concrete. It meets our country wall reform requirement. So, theapplication prospect becomes wider in future.With the increasing of urban construction, the construction waste also increases, how toprocess those recycled concrete is one of the current research focuses. The current researchestowards recycled concrete mainly focus on the beam, the column, the node, the frame, but arefew regarding of the recycled concrete wall. Based on the earlier research achievements, thispaper laied out3pieces of latticed wall what are contained recycled concrete, and then conductsthe seismic performance experiment under the condition low reversed cyclic loading, analysis onthe influence of the performance on the stiffened side column and axial compression load ratio.The following are mainly achievements of this thesis:(1) Based on the prophase research results, this article designed3pieces of lattice formwalls, and conducted the the seismic performance test. The failure mode, failure process, andvarious data about the seismic performance are studied, and compared analysis on the hysteresiscurve, skeleton curve, ductility, and rigidity and bearing capacity.(2) Research and analysis on the seismic performance in different side column, axial loadratio and coarse aggregate.(3) Comparison the equations of the present shear property, choose the better calculationformula.The mainly conclusions are as follows:(1) The failure process of the latticed form walls has experienced the elastic stage,elastic-plastic stage and failure stage under the low reversed cyclic loading. The failure modedominated performances shearing failure, the wall presents the obvious X shape crack, mainlyindicates in the coupling beam places.(2) It can enhance the dissipative ratio, the ductility and energy dissipation of the wall, andimprove the earthquake resistance performance, to enhance the axial load ratio.(3) The cracking strength mentioned above for60%of the limit load. After wall dehiscence,the rigidity rate of descent is quick, after reaching the limit load, the rigidity drop flatten out, thewalls still have good ductility.(4) It can delay the development of the fracture and the dehiscence of the wall, enhance the ultimate supporting capacity, and absorb more energy to increase the reinforcement of the sidecolumn. Experimental results show that the seismic performance of the walls increases with theincreasing of the reinforcement of the side columns.(5) Under the same reinforcements of the side pole and the axial load ratio, the limit loadof the recycled concrete walls is higher than the ordinary walls. The area of hysteresis loop ofthe recycled concrete walls is also bigger. It shows that the seismic behavior of the recycledconcrete walls is better.(6) To take the deduction of the cavern area as the section area of walls, the calculatedvalues by using the calculated formula of solid concrete shear walls are basically in agreementwith the experiment values.