Axial Compression Ratio On The Seismic Performance Of Glass Bead Thermal Insulation Concrete Shear Walls

Glass beads thermal insulation concrete is a kind of new type concrete and it has light weight and good thermal insulation performance characteristics.Glass beads thermal insulation concrete make the insulation and structural systems with same life,significantly improving the value of concrete while reducing the weight of the concrete structure.So the research has good value and generalisability.As energy-saving wall materials,the concrete is facilitate to the design and construction.Avoiding all the disadvantages of a variety of organic insulation materials,the concrete can improve the building’s security readiness.As a structural load-bearing wall material,its mechanical properties and durability were quite with ordinary concrete.The concrete reflects good environmental compatibility and meet the’ requirements of green materials.In the structural safety theory,glass beads thermal insulation concrete reduce the weight of the concrete structure and help to improve the structured seismic performance.In this paper,starting from the structural safety,I take the laboratory building of Shanxi**glass beads of insulation concrete practical engineering as the prototype.I have studied the seismic performance of glass beads thermal insulation concrete shear walls in different axial compression ratio by experimentally and simulation analysis.The thesis ’s work is:1.Our research group made a proposed static test of three axial compression ratio on shear walls and the ratios are 0.1,0.18,0.25.By analyzing for experimental results,I have reach a conclusion of destroy features,capacity and energy dissipation capacity of glass bead thermal insulation concrete shear walls with different axial compression ratio.Three kinds of axial compression ratio of the shear walls have bending and shear failure.With axial compression ratio increases,the bearing capacity of glass beads thermal insulation concrete shear wall increases,displacement ductility factor decreases and energy dissipation capacity weaken.2.I also conducted a theoretical analysis of the bearing capacity of shear wall and used restoring force model to simplify the shear wall.After an appropriate simplification of shear wall model,I have calculated the each piece wall’s initial elastic stiffness,cracking stiffness,stiffness of the ductile phase and the maximum carrying capacity of shear walls.Comparing with experimental results,the calculate results have very little difference.It explains that simplified model is reasonable and calculation methods are appropriate.3.I have analyzed the failure characteristics,bearing capacity,ductility and energy dissipation capacity of glass bead thermal insulation concrete shear walls with five axial compression ratio 0.1,0.18,0.25,0.35 and 0.45 by using ABAQUS finite element software.The results of the three shear walls which have same axial compression ratio 0.1,0.18,0.25 with the test match to the experiment result.Simulation results and experimental results of three pieces of the wall is similar,so verified the rationality of the model and feasibility of analysis method and further studies can be conducted.In addition to simulate the glass bead thermal insulation concrete shear walls with axial compression ratio of 0.1,0.18,0.25,another simulation of axial compression ratio of 0.35 and 0.45 of the shear wall’s carrying capacity,deformation and energy dissipation capacity.From the results of the analysis,glass bead thermal insulation concrete shear walls with large axial compression ratio have poorer ductility,carrying capacity increased slightly,hysteresis curve pinching and energy dissipation capacity diminished.At last I reached the optimal range of axial compression ratio of glass bead thermal insulation concrete shear walls considering the bearing capacity and energy dissipation capacity.That is when the axial compression ratio is from 0.25 to 0.4,overall performance of the shear walls is better.This study points out the influence of carrying capacity and seismic performance by axial compression ratio of glass bead thermal insulation concrete shear walls and the optimal range of axial compression ratio.The results make recommendations and evidence for preparation of future design specifications,and lay the foundation for future studies of thermal insulation concrete structural members.