Numerical Analysis On Sliding Isolation Technology With Bound Rubber Beam For Masonry Buildings In Rural Regions

At present and in a long future, masonry structure will still be the main structureform of buildings in our urban and rural construction. Because of its low strength, poorintegrity and poor seismic behavior, masonry structure has the possibility of collapseunder the strong earthquake. At present, many masonry structures in towns and villagesof our country lack of necessary details of seismic design (such as perimeter beams andstructural columns), or these measures have poor construction quality, make thesebuildings’ seismic behavior be worried by people. From the damage of5.12Wenchuanearthquake we can see, in rural residential construction, we should not only adoptnecessary details of seismic design, but also need to pay more attention to economy andpracticability of them. Aim at the serious problems of rural house’s damage andcollapse in the earthquake, the author’s research group study and put forward a newbase-isolation method, it have the advantages of low cost, simple construction and gooddamping effect, and can be widely applied in the rural area of medium and low intensitydistrict.Test research can verify the specific performance of this method, but the test timeis relatively limited, therefore, part of the research work need to be carried out throughthe finite element analysis method. As the supplement to the test research, the mainwork of this paper is as follows:①Common finite element software and finite element analysis methods formasonry structure are summarized, the finite element analysis software ABAQUS ischose for analyze in this paper; at the same time, the analysis method and operation ofABAQUS are researched adequately.②In order to find a good method to describe the masonry material constitutivebehavior and to simulate the masonry materials accurately in software, the properties ofmasonry material are studied seriously in this paper.③In order to verify the feasibility and reliability of the analysis, the numericalsimulation of the pseudo-static experiments done by research group are carried out bythe analysis software ABAQUS.④Through a large amount of numerical analysis model, the seismic behavior oftraditional structure and sliding structure are compared from the dynamic responsetime-history, damage and energy dissipation. ⑤The influence of friction coefficient to the structure dynamic response indifferent intensity district is analyzed.⑥The numerical simulation for position limit performance of bound rubber beamare carried out.Through the above research work, the following conclusions are obtained:①The results got from the numerical simulation to the pseudo-static experimentsof masonry structure walls by ABAQUS have good agreement to the test results, whichverifies the reliability of the simulation method.②According to the comparison of dynamic time-history analysis results betweentraditional structure and sliding structure with different friction coefficients, thefeasibility of the energy dissipation technology is verified.③Through the calculation of damping rate, the value range of friction coefficientin different intensity district are determined, it has practical value.