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底部开水平缝预应力自复位剪力墙试验设计及结果分析

DOI: 10.13197/j.eeev.2014.06.103.dangxl.014, PP. 103-112

Keywords: 底部开缝,预应力,自复位,剪力墙,试验设计,试验结果

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Abstract:

底部开水平缝预应力自复位剪力墙在墙体与基础连接处的两端对称设置水平缝,中间部分保持正常连接,同时在墙体内设置无黏结预应力钢绞线提供自复位能力.水平缝减少了墙体角部混凝土中拉应力的产生,并引导墙体裂缝仅在连接处开展;中部正常连接部分通过钢筋与混凝土的共同作用提供一定的抗滑移能力,并通过其中钢筋的屈服耗能;无黏结预应力钢绞线通过在弹性范围内变形为剪力墙提供自复位能力.本文介绍了低周反复荷载下底部开水平缝预应力自复位剪力墙的试验设计、试件制作和试验结果.结果表明,底部开水平缝预应力自复位剪力墙试件有较好的自复位能力,且承载力与普通剪力墙相当;相对于传统摇摆墙,耗能能力较好.

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