郭俊平, 邓宗才, 卢海波, 林劲松. 预应力钢绞线网加固钢筋混凝土柱恢复力模型研究[J]. 工程力学, 2014, 31(5): 109-119. DOI: 10.6052/j.issn.1000-4750.2012.11.0833
引用本文: 郭俊平, 邓宗才, 卢海波, 林劲松. 预应力钢绞线网加固钢筋混凝土柱恢复力模型研究[J]. 工程力学, 2014, 31(5): 109-119. DOI: 10.6052/j.issn.1000-4750.2012.11.0833
GUO Jun-ping, DENG Zong-cai, LU Hai-bo, LIN Jin-song. RESEARCH ON RESTORING FORCE MODEL OF RC COLUMNS STRENGTHENED WITH PRESTRESSED HIGH STRENGTH STEEL WIRE MESH[J]. Engineering Mechanics, 2014, 31(5): 109-119. DOI: 10.6052/j.issn.1000-4750.2012.11.0833
Citation: GUO Jun-ping, DENG Zong-cai, LU Hai-bo, LIN Jin-song. RESEARCH ON RESTORING FORCE MODEL OF RC COLUMNS STRENGTHENED WITH PRESTRESSED HIGH STRENGTH STEEL WIRE MESH[J]. Engineering Mechanics, 2014, 31(5): 109-119. DOI: 10.6052/j.issn.1000-4750.2012.11.0833

预应力钢绞线网加固钢筋混凝土柱恢复力模型研究

RESEARCH ON RESTORING FORCE MODEL OF RC COLUMNS STRENGTHENED WITH PRESTRESSED HIGH STRENGTH STEEL WIRE MESH

  • 摘要: 基于16根采用新型预应力钢绞线网张拉锚固技术加固的钢筋混凝土柱和2根对比柱在反复荷载作用下的试验结果, 进行了恢复力模型研究。结合之前相关试验研究, 确定出材料的本构关系, 建立了预应力高强钢绞线网约束加固钢筋混凝土的应力-应变关系方程;考虑构件轴力的二次矩效应, 提出了在反复荷载下预应力加固钢筋混凝土柱骨架曲线的计算方法, 建立了相应理论模型;结合Clough滞回规则, 建立了相应的恢复力模型。研究表明:对试验的材料本构关系适当简化, 通过合理的假定, 由基本的内外力平衡方程和简单的滞回规则, 可得到构件从加载到破坏全过程与试验吻合良好的骨架曲线和滞回曲线, 由此建立的恢复力模型简单、适用, 可为预应力高强钢绞线网加固钢筋混凝土柱设计和施工提供参考。

     

    Abstract: Based on the experimental results of 16 reinforced concrete (RC) columns strengthened with prestressed high strength steel wire mesh (PSWM) and 2 comparative RC columns under cyclic loadings and constant axial loading, the research of the restoring force model of RC columns strengthened with PSWM was carried out. According to the relevant experimental research, the materials’stress-strain relationships were determined;the stress-strain relationship equations of the reinforced concrete confined and strengthened with PSWM under axial loading were established. Considering the axial force of secondary moment effect, the calculation method of skeleton curves of the strengthened RC columns was presented. The restoring force model was established with Clough hysteresis rules. The research demonstrates that: by choosing the suitable material constitutive relationships and assumptions, and based on the force balance equations and existing simple hysteresis rules, the skeleton and hysteresis curves that agree well with the experimental results can be obtained. The restoring force model is simple, applicable and can be used to design and construction of RC columns strengthened with PSWM.

     

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