Seismic Performance of Typical Stone and Brick Masonry Structure Reinforced by Concrete Filled Thin-walled Steel Tube Outer Frame
This work proposed a method which use thin-walled concrete-filled steel tube(CFST)outer frame to strengthen the stone and brick masonry structure.In order to analyze the reinforcement effect,finite element software was used to establish two typical three-story stone and brick masonry models of unreinforced and thin-walled concrete-filled steel tube(CFST)frames constrained reinforcement.The whole process of seismic failure of the structure was simulated and the seismic response and seismic performance were analyzed.The results are as follows.Under the ac-tion of earthquake,the bottom stone wall of the structure is the first to fail out of plane,the upper brick and concrete structure loses support and collapses,and the bottom stone structure is completely crushed,and the three-story whole structure collapses and fails from bottom to bottom.Under the conditions of 70 gal,110 gal and 150 gal peak accelera-tion,the failure states of unreinforced structures are severe failure(displacement Angle 1/250),collapse failure(dis-placement Angle 1/99)and complete collapse,respectively.Results After reinforcement,the structural failure states were moderate failure(displacement Angle 1/700),moderate failure(displacement Angle 1/350)and severe failure(displacement Angle 1/283).Compared with the unreinforced structure,the displacement Angle between layers is re-duced by 33.33%～78.72%,the development of cracks is inhibited,the collapse of the structure is delayed,and the seismic performance of the structure is improved.
stone structurebrick masonry structurethin-walled steel tube concreteseismic reinforcement
万方数据
维普
