Liu Hongjun, Liu Peng, Lin Kun, Zhao Sai
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.
Zhengzhou Architectural Design Institute, Zhengzhou 450052, China.
Materials (Basel). 2016 Mar 4;9(3):166. doi: 10.3390/ma9030166.
The framed structure infilled with a mortarless brick (MB) panel exhibits considerable in-plane energy dissipation because of the relative sliding between bricks and good out-of-plane stability resulting from the use of interlocking mechanisms. The cyclic behaviors of MB are investigated experimentally in this study. Two different types of bricks, namely non-interlocking mortarless brick (N-IMB) and interlocking mortarless brick (IMB), are examined experimentally. The cyclic behavior of all of the joints (N-IMB and IMB) are investigated in consideration of the effects of interlocking shapes, loading compression stress levels and loading cycles. The hysteretic loops of N-IMB and IMB joints are obtained, according to which a mechanical model is developed. The Mohr-Coulomb failure criterion is employed to describe the shear failure modes of all of the investigated joints. A typical frictional behavior is observed for the N-IMB joints, and a significant stiffening effect is observed for the IMB joints during their sliding stage. The friction coefficients of all of the researched joints increase with the augmentation of the compression stress level and improvement of the smoothness of the interlocking surfaces. An increase in the loading cycle results in a decrease in the friction coefficients of all of the joints. The degradation rate () of the friction coefficients increases with the reduction in the smoothness of the interlocking surface.
填充无砂浆砖（MB）面板的框架结构由于砖块之间的相对滑动而具有相当大的面内能量耗散，并且由于采用了联锁机制而具有良好的面外稳定性。本研究通过实验研究了无砂浆砖的循环性能。实验研究了两种不同类型的砖，即非联锁无砂浆砖（N-IMB）和联锁无砂浆砖（IMB）。考虑联锁形状、加载压缩应力水平和加载循环的影响，研究了所有节点（N-IMB和IMB）的循环性能。得到了N-IMB和IMB节点的滞回环，并据此建立了力学模型。采用莫尔-库仑破坏准则描述所有研究节点的剪切破坏模式。N-IMB节点表现出典型的摩擦行为，IMB节点在滑动阶段表现出显著的刚度强化效应。所有研究节点的摩擦系数随着压缩应力水平的增加和联锁表面光滑度的提高而增大。加载循环次数的增加导致所有节点的摩擦系数减小。摩擦系数的退化率（）随着联锁表面光滑度的降低而增大。
