历史建筑砌体墙加固试验抗震性能研究

RESEARCH ON THE SEISMIC BEHAVIOR OF THE REINFORCEMENT EXPERIMENT ON THE MASONRY WALLS OF HISTORIC BUILDINGS

为模拟对历史保护建筑的加固效果,采用100年前的历史建筑墙体拆下的青砖,设计3片砌筑砂浆强度低于1 MPa的低强度缩尺墙体,其中W1为未加固砖墙,W2为钢筋网聚合物砂浆加固砖墙,W3为UHPC加固砖墙&通过拟静力试验,研究钢筋网聚合物砂浆及UHPC材料单面加固对低强度砖墙破坏模式%承载力、延性、刚度、耗能能力等的影响。结果表明:W1为剪切破坏,W2%W3均为剪切滑移破坏,明显提高了试件的承载力、刚度、延性和耗能能力;W2和W3两种加固方式的对比,UHPC材料加固后墙体的承载力及各种性能优于钢筋网聚合物砂浆加固墙体.

To simulate the reinforcement effects of historic candidacy listing buildings which arc low-strength masonry structures,three blocks of low-strength scale walls with masonry mortas strength less than 1 MPa were designed using blue bricks removed from the walls of historic buildings 100 years ago.W1 was an unreinforced brick wall,W2 was reinforccd with steel-mesh polymee mortae and UHPC(Ultre High Performance Concrete)was used to reinforcc W3.The pseudo-static test was ccnducted to investigate the effects of applying steel-mesh polymec mortac and UHPC onesided reinforcement on walls,such as the failure mode,beering capacity,ductility,stiffness,energy dissipation capacity and so on.The result rhowed that W1 performed shecr failure,W2 and W3 were sheer-slip damage,which significantly improved the bearing capacity,stiffness,ductility and energy dissipation capacity of the specimens.CompaeingtheeeinooecementmethodsooW2 and W3,it was concluded that the UHPC-reinforced wall had better reinforcement performance than the steel-mesh polymer mortar reinforced wall.