Lin Kun, Totoev Yuri Zarevich, Liu Hongjun, Guo Tianyou
Shenzhen Engineering Lab for Wind Environment and Technology, Shenzhen Key Lab of Urban & Civil Engineering Disaster Prevention & Reduction, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China.
Centre for Infrastructure Performance and Reliability, The University of Newcastle, University Drive, Callaghan NSW 2308, Australia.
Materials (Basel). 2016 Feb 11;9(2):108. doi: 10.3390/ma9020108.
In order to improve the energy dissipation of the masonry infilled frame structure while decreasing the stiffening and strengthening effects of the infill panels, a new dry stacked panel (DSP) semi-interlocking masonry (SIM) infill panel has been developed. In this paper, the material properties of DSP and a traditional unreinforced masonry (URM) panel have been evaluated experimentally. A series of cyclic tests were performed to investigate the cyclic behaviour of the reinforcement concrete (RC) frame with different infill panels. The failure modes, damage evolution, hysteretic behaviour, stiffness degradation and energy dissipation were compared and analysed. We concluded that DSP is capable of significantly improving the seismic energy dissipation due to its hysteretic behaviour when the frame is in elastic stage without increasing the stiffness of the frame. Therefore, DSP or SIM panels can be considered as frictional dampers. Based on the experimental results, the influence of DSP was examined. Using the parallel model, the hysteretic loops of DSP subjected to different load cases were achieved. The typical full hysteretic loop for DSP could be divided into three distinct stages of behaviour: packing stage, constant friction stage and equivalent strut stage. The connection between the panel and the frame had a great effect on the transferring of different mechanical stages. The constant friction stage was verified to provide substantial energy dissipation and benefits to the ductility of the structure, which, therefore, is suggested to be prolonged in reality.
为了提高砌体填充框架结构的能量耗散，同时降低填充面板的加劲和增强效果，开发了一种新型干砌面板（DSP）半联锁砌体（SIM）填充面板。本文通过实验评估了DSP和传统无筋砌体（URM）面板的材料性能。进行了一系列循环试验，以研究不同填充面板的钢筋混凝土（RC）框架的循环性能。对破坏模式、损伤演化、滞回性能、刚度退化和能量耗散进行了比较和分析。我们得出结论，DSP在框架处于弹性阶段时，由于其滞回性能，能够在不增加框架刚度的情况下显著提高地震能量耗散。因此，DSP或SIM面板可被视为摩擦阻尼器。基于实验结果，研究了DSP的影响。使用并联模型，得到了DSP在不同荷载工况下的滞回环。DSP典型的完整滞回环可分为三个不同的行为阶段：填充阶段、恒摩擦阶段和等效压杆阶段。面板与框架之间的连接对不同力学阶段的传递有很大影响。恒摩擦阶段被证实能提供大量的能量耗散，并对结构的延性有益，因此建议在实际中延长该阶段。
