Stress-strain model for confined reinforced concrete in bridge piers
Stress-strain model for confined reinforced concrete in bridge piers
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DOI：
10.1061/(asce)0733-9445(1997)123:5(624
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发表时间：
1997-05-01
期刊：
影响因子：
--
通讯作者：
Taylor, AW
中科院分区：
文献类型：
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作者：
Hoshikuma, J;Kawashima, K;Taylor, AW
本文基于钢筋混凝土柱试件的一系列压缩加载试验结果，建立了考虑约束效应的混凝土应力-应变模型。试件具有圆形、方形和墙式横截面，具有各种环向钢筋布置，以覆盖日本设计的实用桥梁柱截面。试验结果表明，峰值应力、峰值应变和劣化率这三个参数是影响约束混凝土应力-应变曲线的重要因素。根据测试数据对这些参数进行统计分析，并提出估计它们的方程。还提出了等效受限截面来评估墙型横截面中拉杆的影响。测试结果与提出的模型和现有模型进行了比较。比较表明，与现有模型相比，该模型预测的应力应变关系与实验结果具有更好的一致性。
In this paper, a stress-strain model of concrete that takes confinement effects into account is developed, based on the results of a series of compression loading tests of reinforced concrete column specimens. The specimens have circular, square, and wall-type cross sections, with various arrangements of hoop reinforcement so as to cover practical bridge column sections designed in Japan. Test results showed that three parameters-peak stress, strain at peak stress, and deteriorating rate-are significant factors for the stress-strain curve of confined concrete. These parameters were analyzed statistically based on test data and equations for estimating them were proposed. An equivalent confined section was also proposed to evaluate effect of cross ties in wall-type cross section. Test results were compared with both the proposed model and existing models. The comparison showed that the predicted stress-strain relation by the proposed model provides better agreement with the experimental results than existing models.