经历平面内损伤的阻尼填充墙框架平面外受力性能试验研究

发布时间：2018-05-24 17:40

本文选题：阻尼填充墙 + 静力试验　；参考：《建筑结构学报》2017年09期

【摘要】：为研究双向地震作用下阻尼填充墙(damped infill wall,DIW)的平面外受力性能,对3片经历了平面内拟静力加载试验的DIW进行平面外静力加载试验,研究DIW平面外的受力性能、变形模式和破坏特征。结果表明:DIW的平面外受力阶段分为弹性、弹塑性、塑性和破坏4个阶段,各阶段的DIW平面外位移沿墙体高度分布均呈"三折线"形态;DIW具有一定的平面外抗侧刚度,与以低强度砂浆作为阻尼层的DIW相比,以SBS改性沥青卷材作为阻尼层的DIW平面外初始刚度明显较大,可更好地控制墙体的平面外变形。DIW通过砌体单元间以及砌体单元与框架梁间的相互作用形成拱承载机制,具备抵御9度罕遇地震作用下平面外承载能力;DIW的拉结筋主要在墙体平面外位移较大时发挥作用,具有第二道防线的作用。拉结筋拉断标志着DIW的最终破坏,拉断前DIW未发生失稳倒塌现象。
[Abstract]:In order to study the out-of-plane mechanical behavior of damped infill wall (DIW) of damped filled wall under the action of bi-directional earthquake, three pieces of DIW subjected to in-plane quasi-static loading tests were tested under out-of-plane static loading, and the mechanical properties of DIW outside the plane were studied. Deformation patterns and failure characteristics. The results show that the out-of-plane stress stage of the DIW is divided into four stages: elasticity, elastic-plastic, plastic and failure. The out-of-plane displacement of DIW in each stage is "three broken lines" along the wall height. Compared with DIW with low strength mortar as damping layer, the out-of-plane initial stiffness of DIW with SBS modified asphalt roll as damping layer is obviously larger. The out-of-plane deformation of the wall can be better controlled. DIW can form the arch bearing mechanism through the interaction between the masonry elements and the frame beam. Under the action of 9 degree rare earthquake, the tension tendons with out-of-plane bearing capacity and DIW play an important role when the displacement of the wall outside the plane is large, and has the function of the second line of defense. The ultimate failure of DIW is indicated by the tensile tendons breaking, and no unstable collapse of DIW occurs before tensile break.
【作者单位】：广州大学土木工程学院;
【基金】：国家自然科学基金面上项目(51178128,51478133)
【分类号】：TU317

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