Experimental Study on Seismic Performance of Masonry Structure with Large Openings at the Bottom Floor of Reinforced Concrete Walls
To address the issues of weakened seismic performance and reduced safety caused by the ex-pansion of openings at the bottom floor of masonry structure to meet the functional requirements,a 1:4 scale model of a four-story brick-concrete masonry structure was designed and constructed.Based on the principle of stiffness equivalence,part of the traditional masonry walls on the side of the bottom floor with large openings were replaced by reinforced concrete walls.The low-cycle loading test was conducted to evaluate the seismic performance,including failure mode,displacement variation,hys-teresis curve,skeleton curve,and stiffness degradation at each floor of the structure.The results showed that the masonry structure was closely connected with the reinforced concrete walls,endow-ing the whole structure with the characteristic of ductility.The structure had no sudden change in load-bearing capacity and maintained good seismic energy dissipation performance.The displacement of the second floor of the structure was significant,and its stiffness should thus be prioritized during the de-sign process to avoid the formation of a weak floor.Using reinforced concrete walls can effectively pre-vent torsion of the masonry structure with large openings at the bottom floor during earthquakes.
masonry structurelarge openings at bottom floorreinforced concrete wallspseudo-static testseismic performance
万方数据
维普
