新型框架阻尼填充墙性能分析

介绍了新型框架阻尼填充墙的构造方法，并剖析其原理；采用有限元方法分析空框架、普通填充墙框架与阻尼填充墙框架在单调静力荷载作用下的响应，揭示了阻尼填充墙的工作机制，对比研究了阻尼填充墙和普通填充墙的性能差异和优劣，结果表明：框架侧移时，阻尼填充墙的变形主要集中于剪切刚度较小、变形能力良好的粘弹性层，与普通填充墙相比，其变形能力明显提高，受力大为降低；阻尼填充墙能给主体框架提供一定的侧向刚度，有利于小震下结构的位移控制，但其刚度明显低于普通填充墙，能延长结构周期，减小结构在地震中所承受的地震作用。此外，阻尼填充墙对框架侧向变形造成的约束较普通填充墙大为削弱，能延缓主体框架形成塑性铰发生破坏。

Performance Analysis of the New-type Damped Infill Wall

The construction method of the damped infill wall (DIW) which was advanced recently is presented, and its principle is also exposed in this paper. Moreover, the behaviors of the bare frame, the frame filled with conventional infill wall (CIW) and the frame filled with DIW under the monotonic-static load are simulated with finite element method. Based on the results, not only the mechanism of the DIW is exposed, but also the performances of the DIW and the CIW are analyzed comparatively. It is found that, the masonry elements of the DIW shift horizontally as a whole when its surrounding sways, and the deformation of the DIW mainly focuses on the softer viscous-elastic layers. In comparison with the CIW, the DIW shows marked improvements in deformation capacity and bears much smaller force. Also, the DIW can provide certain lateral stiffness for the frame which is beneficial to the structural displacement control for minor earthquakes. But its lateral stiffness is much lower than the CIW which means that the DIW can prolong structures’ period notably and reduce structures’ seismic action during earthquakes. Furthermore, the DIW produces much weaker constraint on the lateral deformation of the surrounding frame than the CIW, and is capable of delaying the destruction of the framework with the formation of plastic hinges.