Experimental Investigation And Damage Model Research On The Seismic Behavior Of T-shaped Short Shear Wall With RAC

With the function of the building, structure, increasing demands by force and other aspects of the project cost, short-leg shear wall structure as a new form of architectural structures have emerged in recent years, it has been widely at home and abroad application and development. At present, domestic and foreign scholars to test on short pier shear wall is still focused on ordinary concrete short-leg shear walls, recycled concrete for short shear wall elements lacking in-depth study and discussion. Therefore, this paper recycled concrete T-shaped short pier shear wall structure seismic performance test and theoretical analysis, and based on the test results of the analysis of the recycled concrete T-shaped short pier shear correction damage model for recycled concrete T shaped short pier shear damage assessment reference.In order to study the model is suitable for the regeneration of damaged concrete T-shaped short-leg shear wall, this paper carried out the following tasks:(1) With different recycled coarse aggregate replacement rate of the main parameters, design and production of recycled concrete block, 9 group of 27, including recycled coarse aggregate replacement rate of 0%, 50% and 100%, respectively. By wood properties were studied recycled concrete cube compressive strength, elastic modulus and the axial compressive strength, analysis of different recycled coarse aggregate replacement rate affect the regeneration of the mechanical properties of concrete, and also studied at different recycled coarse aggregate replacement rate under the circumstances, recycled concrete compressive stress- strain curve, gives a different recycled coarse aggregate replacement ratio of recycled concrete in compression segment increased constitutive equation model.(2) With different recycled coarse aggregate replacement ratio, different height to thickness ratio of parameters, according to the proportion of 1/2 scale design of the five T-shaped short pier shear test model structure, and its low cyclic reversed quasi-static test under load, the analysis of the recycled coarse aggregate replacement ratio and high thickness ratio on the recycled concrete T-shaped short-leg shear failure mode, hysteretic behavior, carrying capacity, ductility, stiffness, and energy Capacity, and the test results were analyzed based on the above performance with recycled coarse aggregate replacement ratio and thickness ratio change the general law, to draw some conclusions and suggestions for reference.(3) Low-week trial data based on different conditions of five recycled concrete T-short-leg shear walls, combined with improvements applicable to ordinary reinforced concrete members and draw two-parameter model of earthquake damage to the actual structure of the various damage damaged degree Dc, calculated to determine the combination of ? coefficients of each RAC shear walls. Matlab right to use recycled aggregate replacement ratio R, high-thickness ratio H based multi-variable linear equations were fitted to determine the combination formula coefficient ?, ? = 0.0577 R + 0.0122 H, thus correcting Park-Ang model made a further amendment to make it more suitable for calculating RAC short shear wall damage, provide a reference for recycled concrete T-shaped short pier shear wall damage assessment.(4) Application of ABAQUS finite element analysis software, combined with recycled concrete compressive article suggested constitutive model and existing research on renewable short-leg shear wall concrete finite element analysis to study the hysteresis curve and failure mode, explore the energy dissipation capacity, and with the experimental results were compared, both in good agreement, justify ABAQUS model established in this paper.