Reinforced Masonry Shear Wall High-Stength Performance Analysi

Reinforced masonry shear wall strength is stronger than MU15 using high-strength blocks, and uses a high strength grouted concrete (grouted concrete strength grade is greater than Cb30), also set the column concrete strength with the corethe same column reinforced masonry structures.This paper focuses on high-strength reinforced masonry shear wall with the seismic performance and design to design eight reinforced concrete hollow block masonry shear wall specimens, used as a test and numerical analysis of the basic model,ANSYS software is set up on the walls using the finite element analysis model.The results show that the proposed model is based on the calculation results of the analysis in good agreement with the theoretical value.The walls were designed by ANSYS analysis, considering the different axial compression ratio, different intensity and different block core columns - strength of structural concrete column parameters, the wall of the failure process and failure mode, bearing capacity situation,cycle, vibration mode, hysteresis characteristics, the skeleton curve, ductility and stiffness properties.Through modal analysis of the model, the main analysis of the first six vibration modes.Harmonic analysis to analyze the lateral load in the X axis excitation time history of displacement curves.Obtained data showed that the displacement curve to determine the frequency of 6.9-7.8 when the displacement is often too large and easy to produce resonance.Obtained by analysis and comparison, in the same control factors, alone will increase the intensity level increase block wall area of hysteresis loop, that is also increasing energy dissipation capacity of the limit load has also been substantially increased;When the axial compression ratio is improved, the ultimate bearing capacity of the specimen increased, hysteresis loop area did not change significantly.When the individual to improve core columns - strength of concrete structural columns, the walls of the hysteresis loop area has been significantly improved.Skeleton curves are very close in morphology, development trend is similar, but in descending the ultimate load values and different characteristics.Under the same conditions, when the core columns - the concrete strength structural columns increase from C35 to C45, the wall to enhance the ultimate load by about 25%, the yield increase by about 15% of the load.Alone under the same conditions to improve block strength, ultimate load and so improve its relatively limited impact.When analyzed by comparing strength in different block, different core columns - as well as different structural column concrete strength under axial compression ratio change of ductility obtained Individual promotions or block wall strength of the axial compression ratio can improve the ductility of the wallWhen the block upgrade to the MU30 MU20 strength from, the wall of the ductility factor increase of 24%.But its role did not enhance the core columns - the strength of concrete structural columns magnitude.Core column and structural columns, beam interaction constraints constitute the wall system to improve the ductility and energy dissipation of the wall.