Experimental Study On Seismic And Crack-Resistance Behavior Of Composite Concrete Block Masonry Walls

Along with the basic national policy of "Protecting land source and farm" must be executed and the urgent requirement of energy saving have to be met as well. Composite concrete small hollow blocks with the advantages of both energy saving and land source protecting are to be adopted widely soon.This type of blocks has many excellent properties such as: energy insulating, land saving, environment protecting, easy to be constructed, etc. Walls constructed with this type of blocks have as good energy abilities as cavity wall filled with insulation while the construction process is much easier. In our nation, information and studies on the performance of this new type of blocks are scarce and the code is also completely blank about this, which delays and limits the utility of it. This paper presents a series of experimental and theoretical studies, some conclusions are drawn and some suggestions are given also, which has practical engineering meanings. The main study contents:We have desined four composite concrete small hollow blocks masory walls. Proceeded to add unilataeral horizontal static loading experiment to four piece of composite concrete small hollow blocks masory walls model. Crack-resistance behaviors were analyzed.Adopt a finite element analysis soft and proceeed nonlinear finite element analsis to composite concrete small hollow blocks masory walls. The result express that which have window, have stress concentration at the v/indow cape, and compare the different type walls, a problem is discovered that window is consumedly lowered the carrying capacity of crack-resistence and stiffness of wall. And these are accord with the result of experimentation.In addition, experiment is full-size wall models are tested under both constant vertical load and horizontal low cyclic load to investigate the lateral resistance, ductility, energy-dissipation, stiffness degradation, hysteresis curves, and failure mechanisms.Through the experimental study and theoretical analysis, the behaviors of the composite concrete hollow block masonry walls under seismic loads are concluded.At the same time, some structural suggestions and designing suggestions are presented based on the experiment study and theoretical analysis in this paper to offer basic references for the use of composite blocks.