预应力钢绞线网加固钢筋混凝土柱恢复力模型研究

发布时间：2018-03-15 03:16

本文选题：预应力高强钢绞线　切入点：钢筋混凝土柱　出处：《工程力学》2014年05期 　论文类型：期刊论文

【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 columns and two contrast columns strengthened by a new type of prestressed steel strand tensioning and anchoring technology under repeated loads, the model of restoring force is studied. The constitutive relation of the material is determined, and the stress-strain relation equation of reinforced concrete strengthened by prestressed high-strength steel wire mesh is established, and the secondary moment effect of the axial force of the member is considered. The calculation method of reinforced concrete column skeleton curve under repeated load is put forward, the corresponding theoretical model is established, and the Clough hysteretic rule is combined. The corresponding restoring force model is established. The results show that the constitutive relations of the tested materials are suitably simplified, and the basic equilibrium equations of internal and external forces and simple hysteretic rules are obtained by reasonable assumptions. The skeleton curve and hysteresis curve of the whole process from loading to failure can be obtained. The model of restoring force is simple and applicable. It can be used as a reference for the design and construction of reinforced concrete columns strengthened by prestressed high-strength steel wire mesh.
【作者单位】：北京工业大学建筑工程学院;北京环友建筑技术发展有限责任公司;
【分类号】：TU375.3

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