废弃纤维再生混凝土框架中柱节点抗震性能试验研究

发布时间：2018-01-12 04:23

本文关键词：废弃纤维再生混凝土框架中柱节点抗震性能试验研究　出处：《振动与冲击》2017年02期 　论文类型：期刊论文

【摘要】：完成了再生骨料取代率为50%,废弃纤维长度分别为12 mm、19 mm、30 mm以及废弃纤维体积掺量分别为0.08%、0.12%、0.16%的5个废弃纤维再生混凝土框架中柱节点在低周反复荷载作用下的抗震性能试验研究。主要对不同废弃纤维长度、不同废弃纤维体积掺量下梁柱节点的破坏形态、滞回特性、延性性能、耗能特性等问题进行了对比分析。结果表明:废弃纤维再生混凝土框架节点的破坏均经历了初裂、通裂、极限、破坏四个特征阶段,当纤维长度为19mm,废弃纤维体积掺量为0.12%时,废弃纤维再生混凝土梁柱节点构件的滞回性能、延性性能及耗能性能较好;废弃纤维的体积掺量比废弃纤维长度对梁柱节点抗震性能的影响大。提出了废弃纺织纤维再生混凝土的抗剪承载力计算公式,计算结果与试验结果吻合较好。
[Abstract]:The replacement ratio of recycled aggregate is 50, the length of waste fiber is 12 mm ~ 19 mm ~ (30 mm) and the volume fraction of waste fiber is 0.08% 0.12%. Experimental study on seismic behavior of column joints of 5 recycled fiber reinforced concrete frames in 0.16% under low cyclic cyclic loading. Failure form, hysteretic property and ductility of beam-column joints with different volume of waste fiber. The energy dissipation characteristics are compared and analyzed. The results show that the failure of the derelict fiber regenerated concrete frame joints has experienced four characteristic stages: initial crack, crack, limit and damage, when the fiber length is 19mm. When the volume of waste fiber is 0.12, the hysteretic performance, ductility and energy dissipation of Liang Zhu joint members of recycled concrete are better. The volume content of waste fiber is more important than the length of waste fiber on the seismic behavior of Liang Zhu joint. A formula for calculating the shear capacity of recycled concrete of waste textile fiber is proposed. The calculated results are in good agreement with the experimental results.
【作者单位】：沈阳建筑大学建筑节能研究院;沈阳建筑大学土木工程学院;
【基金】：国家自然科学基金项目(51178275)
【分类号】：TU37;TU352.11
【正文快照】： 随着环境及资源问题的日益凸显,再生混凝土的应用顺应了绿色建筑的发展趋势。再生混凝土内部普遍存在瑕疵、微裂缝,已有研究发现再生混凝土的力学性能相对普通混凝土差[1-4],纤维的加入可以改善再生混凝的力学性能,因此纤维再生混凝土的深入研究对推进再生混凝土发展有重要意

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