高延性纤维混凝土低矮剪力墙抗震性能试验研究

发布时间：2018-07-03 04:17

本文选题：高延性纤维混凝土 + 低矮剪力墙　；参考：《建筑结构》2017年02期

【摘要】：提出采用高延性纤维混凝土(HDC)改善低矮剪力墙的抗震性能和变形能力,设计了2个HDC低矮剪力墙试件,并进行了拟静力试验,研究其破坏机理、变形能力及耗能能力。试验结果表明:HDC低矮剪力墙破坏时,墙体中下部剪切斜裂缝宽度较小,说明HDC材料的受拉应变硬化和多裂缝开展性能,可有效控制剪切斜裂缝的开展;与相关文献中2个高强混凝土低矮剪力墙相比,HDC低矮剪力墙的变形和耗能能力明显提高;利用HDC良好的抗剪性能,可以减少水平分布钢筋的数量;HDC低矮剪力墙试件破坏时,墙体下部未产生较大面积的混凝土剥落,表明采用HDC可显著改善低矮剪力墙的脆性剪切破坏模式,提高其抗震性能和损伤容限,减小或免去强震后的修复费用。
[Abstract]:High ductile fiber reinforced concrete (HDC) is used to improve the seismic performance and deformation capacity of low shear wall. Two HDC low shear wall specimens are designed, and quasi-static tests are carried out to study their failure mechanism, deformation capacity and energy dissipation capacity. The test results show that the width of shear slant crack in the middle and lower part of the wall is smaller when the low shear wall is destroyed, which indicates that the tensile strain hardening and multi-crack development of HDC material can effectively control the development of shear inclined crack. The deformation and energy dissipation capacity of HDC low shear wall is obviously improved compared with the two high strength concrete low shear walls mentioned in related literature, and the quantity of horizontal distributed steel bars can be reduced when the HDC low shear wall specimen is destroyed. There is no concrete spalling in the lower part of the wall, which indicates that HDC can significantly improve the brittle shear failure mode of low shear wall, increase its seismic performance and damage tolerance, and reduce or avoid the repair cost after strong earthquake.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金资助项目(51578445) 西安市科技计划项目(CX13135-3)
【分类号】：TU352.11;TU377

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