摩擦型阻尼填充墙单元的设计及性能试验研究

Design and performance experimental study of frictionally damped infill wall unit

基于阻尼填充墙的构造与原理,设计一种以低强度薄层砂浆为阻尼层的摩擦型阻尼填充墙单元(FDIWU)构造方案。通过对三榀砌块类型不同的FDIWU试件进行拟静力试验,研究FDIWU的力学性能。试验结果表明:(1)以低强度薄层砂浆为阻尼层的FDIWU的构造和原理是可行的,能成功实现"砌体单元平动,不破坏"的预期机制和设计目标。(2)以低强度薄层砂浆为阻尼层的FDIWU具有较大的初始刚度;起滑后,刚度明显降低。(3)以低强度薄层砂浆为阻尼层的FDIWU耗能机理明确,耗能能力强。(4)用不同类型砌块砌筑的FDIWU的承载力、刚度、强度退化及变形特性基本相同,耗能性能有差别。用表面较为粗糙的砌块砌筑的FDIWU的耗能能力较强。

Based on the test results, the mechanical properties of FDIWU was studied. It was found that ： （ 1 ） The construction scheme that set LSML as DIW units＇ damping layer was feasible, which successfully achieved the ex- pected mechanism and the design aim that the masonry unit of FDIWU translating as a whole without breaking. （2） Having an explicit energy dissipation mechanism, the FDIWU with LSML owns excellent energy dissipation capaci- ty. （3）The FDIWU with ISML owns high initial stiffness, and its stiffness decreases obviously when its masonry u- nit begins strength d capacity. gy- to slide. （4）FDIWUs constructed with different building blocks have similar bearing capacity, stiffness, egradation properties and FDIWU constructed with deformation characteristic, and have great difference between energy dissipation building blocks with coarser surface plays an important role in dissipating ener-gy.