| Reinforced concrete masonry shear wall structure, which combines the advantagesof both traditional masonry structures and reinforced concrete structures, has been usedmore and more widely in the field of structural engineering. Nevertheless, there is anurgent need to carry out a vast and thorough research on its performance, as most of thebuilding design codes do not provide specific provisions regarding the details ofdesigning such structures whose building height exceeds a certain limit. Currently,seismic designing and performance assessment of such tall buildings are growing dayby day at home and abroad. This study, through numerical simulation, explores theseismic performance of a tall masonry shear wall structure with a height of100m. Themain contents are as follows:(1) The overall model of a tall reinforced masonry shear wall structure isestablished by the finite element analysis software of Abaqus. And then vitality of thismodel is confirmed by comparison of its dynamic characteristics to those obtained fromthe field test.(2) Modal analysis of the model of this tall building structure is performed, andeffect of the structural parameters on its dynamic properties is investigated.(3) The elastic time-history analysis of this structure is conducted by subjecting toground motions scaling at different intensity levels, and its relevant seismicperformance is evaluated.(4) Elasto-plastic time-history analysis of the structure is carried out underdifferent ground motion intensity levels and different directions, and the resultedresponses are compared with those derived from elastic time-history analysis. Theinfluence of rigid floor hypothesis on the plastic seismic response of the structure issubsequently analyzed. Impact on the structure’s seismic performance from ring beamand window belly wall is compared.Then the overall damage indices of the structureunder severe earthquake actions are calculated by means of the ‘frequency method’, andthe overall seismic performance is evaluated. |
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