Study on seismic behavior of shear wall with different coal gangue replacement rate
In order to explore the influence of coal gangue replacement rate on the seismic performance of coal gangue concrete shear wall,low cyclic loading tests were carried out on three shear walls with different coal gangue replacement rates.Based on the damage modes,load-displacement relationships and stress distribution characteristics of the shear walls,the variation laws of bearing capacity,ductility,stiffness degradation,strength degradation and energy dissipation of shear walls were analyzed.The results show that bending-shear type damage occurs in medium and high shear walls with different coal gangue replacement rate,and the similar failure modes and stress characteristics can be found out.Along with the increase of coal gangue replacement rate,the specimen bearing capacity and ductility are negatively correlated with it.The secant stiffness and strength of the specimen have gradient reduction,and the reduction speed is increasing.While coal gangue replacement rate has a significant effect on the initial energy consumption level of the specimen.As the loading level increases,the energy consumption level of the specimens is negatively correlated with the aggregate replacement rate,but the effect is limited.Considering the reduced structural self-weight,low cost,and alignment with the concept of green and low-carbon development,coal gangue,when utilized as concrete aggregate,can thus replace conventional concrete shear walls in rural houses and low-to-medium-rise buildings.
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