预应力钢绞线网加固钢筋混凝土柱恢复力模型非线性数值分析
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摘要
分析预应力钢绞线网加固钢筋混凝土柱在地震荷载作用下的受力特性,对该加固技术的应用与推广具有重要的意义。基于往复荷载作用下截面非线性数值模拟计算方法,主要分析钢筋和预应力钢绞线约束混凝土的本构模型、塑性铰计算对骨架曲线影响,且对横向预应力的计算重新定义。分别对预应力度为0, 24.5%, 32.7%,轴压比为0.4,3根圆形截面柱进行恢复力模型非线性数值分析,结果表明:采用更加完善的材料本构模型提高各特征点的计算精度,塑性铰对峰值点的影响明显。结合Clough恢复力模型滞回规则,考虑轴压比、配箍率以及钢绞线特征值对截面刚度变化影响,得到的滞回曲线与试验结果相吻合。提出的恢复力模型考虑了多种主要影响因素,同时得到了试验验证,可为实际工程的设计与应用提供理论依据。
Analysis the characteristics of prestressed steel wire mesh reinforcement the reinforced concrete column under seismic load, has important significance to application and promotion this reinforcement technology. Based on the method of nonlinear numerical simulation under reciprocating loading. This article mainly analyzes the steel bar and confined concrete constitutive model, plastic hinges, and to redefine transverse prestressing. Respectively for prestressed degree of 0, 24.5%, 32.7%, axial compression ratio 0.4,3 circular cross section column restoring force model nonlinear numerical analysis; the results show that the material constitutive model to improve the calculation precision of the feature points, the plastic hinge of peak point effect is obvious. Combining with Clough restoring force model of hysteresis rules, axial compression ratio, stirrup ratio, steel strand characteristic value of cross section stiffness change, the hysteretic curve is consistent with the experimental results. The restoring force models proposed in this paper consider a variety of main influence factors. Further more, they considered main influenced facts and are verified by the testing, and provide theoretical basis for the design and application of actual engineering.
Analysis the characteristics of prestressed steel wire mesh reinforcement the reinforced concrete column under seismic load, has important significance to application and promotion this reinforcement technology. Based on the method of nonlinear numerical simulation under reciprocating loading. This article mainly analyzes the steel bar and confined concrete constitutive model, plastic hinges, and to redefine transverse prestressing. Respectively for prestressed degree of 0, 24.5%, 32.7%, axial compression ratio 0.4,3 circular cross section column restoring force model nonlinear numerical analysis; the results show that the material constitutive model to improve the calculation precision of the feature points, the plastic hinge of peak point effect is obvious. Combining with Clough restoring force model of hysteresis rules, axial compression ratio, stirrup ratio, steel strand characteristic value of cross section stiffness change, the hysteretic curve is consistent with the experimental results. The restoring force models proposed in this paper consider a variety of main influence factors. Further more, they considered main influenced facts and are verified by the testing, and provide theoretical basis for the design and application of actual engineering.
引文
[1]郭子雄,杨勇.恢复力模型研究现状及存在问题[J].世界地震工程, 2004, 20(4):47–51.
[2]张国军,吕西林,刘伯权高强混凝土框架柱的恢复力模型研究[J].工程力学, 2007,42(3):83–89.
[3]陈亮.高强不锈钢绞线网用于混凝土柱抗震加固的试验研究[D].北京:清华大学, 2004.
[4]葛超.横向预应力钢绞线-聚合物砂浆加固小偏心受压柱试验研究[D].南昌:华东交通大学, 2015.
[5]CHOIJH.Seismic retrofit of reinforced concrete circular columns using stainless steel wire mesh composite[J]. Canadian Journal of Civil Engineering,2008, 35(2):140–147.
[6]HUANG H, ZHANG Y, ZHENG Y B, et al.Parametric Analysis of Seismic Performance of RC Columns Strengthened with Steel Wire Mesh[J].Journal of Highway andTransportation Research and Development, 2014, 8(3):52–63.
[7]MURAT S, CEM Y. External prestressing concrete columns for improved seismic shear resistance[J].Journal of Structural Engineering, ASCE, 2003, 129(8):1057–1070.
[8]郭俊平,邓宗才,卢海波,等.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):109–118.
[9]汪训流,陆新征,叶列平.往复荷载下钢筋混凝土柱受力性能的数值模拟[J].工程力学,2007,24(12):76–81.
[10]郭俊平,邓宗才.预应力钢绞线加固混凝土圆柱的轴压性能[J].工程力学, 2014,31(3):129–137.
[11]陈继东.高强箍筋约束高强混凝土柱抗震性能试验和非线性分析[D].西安:西安建筑科技大学, 2009.
[12]BING L, PARK R, TANAKA H. Stress-strain behavior of highstrength concrete confined by ulra-high-and normal-strength transverse reinforcement[J].ACI,Structural Journal,2001,98(3).
[13]朱伯龙,董振祥.钢筋混凝土非线性分析[M].上海:同济大学出版社, 1985.
[14]张国军,吕西林,刘伯权.高强混凝土框架柱的恢复力模型研究[J].工程力学,2007,24(3):83–89.
[2]张国军,吕西林,刘伯权高强混凝土框架柱的恢复力模型研究[J].工程力学, 2007,42(3):83–89.
[3]陈亮.高强不锈钢绞线网用于混凝土柱抗震加固的试验研究[D].北京:清华大学, 2004.
[4]葛超.横向预应力钢绞线-聚合物砂浆加固小偏心受压柱试验研究[D].南昌:华东交通大学, 2015.
[5]CHOIJH.Seismic retrofit of reinforced concrete circular columns using stainless steel wire mesh composite[J]. Canadian Journal of Civil Engineering,2008, 35(2):140–147.
[6]HUANG H, ZHANG Y, ZHENG Y B, et al.Parametric Analysis of Seismic Performance of RC Columns Strengthened with Steel Wire Mesh[J].Journal of Highway andTransportation Research and Development, 2014, 8(3):52–63.
[7]MURAT S, CEM Y. External prestressing concrete columns for improved seismic shear resistance[J].Journal of Structural Engineering, ASCE, 2003, 129(8):1057–1070.
[8]郭俊平,邓宗才,卢海波,等.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):109–118.
[9]汪训流,陆新征,叶列平.往复荷载下钢筋混凝土柱受力性能的数值模拟[J].工程力学,2007,24(12):76–81.
[10]郭俊平,邓宗才.预应力钢绞线加固混凝土圆柱的轴压性能[J].工程力学, 2014,31(3):129–137.
[11]陈继东.高强箍筋约束高强混凝土柱抗震性能试验和非线性分析[D].西安:西安建筑科技大学, 2009.
[12]BING L, PARK R, TANAKA H. Stress-strain behavior of highstrength concrete confined by ulra-high-and normal-strength transverse reinforcement[J].ACI,Structural Journal,2001,98(3).
[13]朱伯龙,董振祥.钢筋混凝土非线性分析[M].上海:同济大学出版社, 1985.
[14]张国军,吕西林,刘伯权.高强混凝土框架柱的恢复力模型研究[J].工程力学,2007,24(3):83–89.