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	箍筋约束高强混凝土受压应力-应变本构关系
	赵作周 ; 张石昂 ; 贺小岗 ; 钱稼茹 ; ZHAO Zuozhou ; ZHANG Shiang ; HE Xiaogang ; QIAN Jiaru
	2016-03-30 ; 2016-03-30
关键词	高强混凝土柱 箍筋约束 轴压试验 应力-应变曲线 high strength concrete stirrup confined axial compression experiment stress-strain curve TU37
其他题名	Stress-strain relationship of stirrup-confined high-strength concrete
中文摘要	收集了国内外44根不同边长的方形截面箍筋约束高强混凝土柱轴心受压试验的试验结果,试件混凝土强度C50~C110,配箍特征值λ为0.01~0.27。根据对样本实测结果的分析与拟合,提出了箍筋约束高强混凝土峰值应力fcc和应变εcc与配箍特征值λ的计算式,建议了箍筋约束高强混凝土受压应力-应变全曲线模型(ZSA模型)。完成了3根无混凝土保护层、边长为470 mm的箍筋约束高强混凝土柱的受压试验。实测混凝土立方体抗压强度为68 MPa,得到了试件的轴力-压应变曲线。通过对试件试验结果的分析与模拟,证明建议的ZSA模型的预测结果与试验结果相近。通过对已有其他典型试件的数值模拟分析,证明提出的ZSA模型预测的峰值应力fcc、峰值应变εcc和下降段应变ε0.85与试件试验结果相近,曲线下降段比Légeron模型下降段平缓。建议模型形式简单,可供箍筋约束高强混凝土柱的相关分析参考。; The experimental data of 44 axially loaded square-shaped stirrup-confined high strength reinforced concrete column specimens with different sizes were collected and analyzed. The strength grades of the concrete are in the range of C50 to C110. The stirrup characteristic values( λ) of the specimens are in the range of 0. 01 to 0. 27. An analytical model,named ZSA model,including an uniaxial compressive stress-strain relationship describing the relationship between the confined concrete peak compression strength fccand the corresponding strain εccand λ were proposed respectively. Three square-shape stirrup-confined high-strength RC columns with an edge of 470 mm without concrete cover were tested under axial compression. Measured concrete cubic compression strength of the specimens was 68 MPa. Axial force-compressive strain of the specimens were measured and analyzed. The column specimens were simulated using the proposed ZSA model as well. Some other typical tested stirrup-confined high strength reinforced concrete column specimens were simulated using the proposed ZSA model, Légeron model and Razvi model respectively. It is proved that the proposed ZSA model agrees well with the test results at the peak strength fccand the corresponding strain εcc,strain at 0.85fccon the descending stage. The descending part of ZSA model is flat than that of Légeron model. The proposed ZSA model can predict the stirrup-confined high strength concrete column behavior more accurately and be used in the related nonlinear simulation.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148951]
专题	清华大学
推荐引用方式 GB/T 7714	赵作周,张石昂,贺小岗,等. 箍筋约束高强混凝土受压应力-应变本构关系[J],2016, 2016.
APA	赵作周.,张石昂.,贺小岗.,钱稼茹.,ZHAO Zuozhou.,...&QIAN Jiaru.(2016).箍筋约束高强混凝土受压应力-应变本构关系..
MLA	赵作周,et al."箍筋约束高强混凝土受压应力-应变本构关系".(2016).

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