[口头报告]钢筋混凝土空心墩弯剪耦合分析理论研究

钢筋混凝土空心墩弯剪耦合分析理论研究
编号:96 访问权限:仅限参会人 更新:2025-05-06 09:22:24 浏览:62次 口头报告

报告开始:2025年05月17日 16:20 (Asia/Shanghai)

报告时间:10min

所在会议:[P] 5月17日下午分会 » [P5] 5. 桥梁结构抗震、减隔震理论与韧性提升

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摘要
Reinforced concrete (RC) thin-walled hollow piers often exhibit prominent flexure-shear effect, especially when subjected to pulse-like earthquakes. To predict the axial-flexure-shear behaviors of such hollow piers, an innovative approach named Axial-Flexure-Shear-Interaction-Membrane-Beam-Truss-Element-Model (AFSI-MBTEM) is developed. The interaction between flexure and shear behaviors is analyzed based on the multi-dimensional material and the multiple types of elements. The bi-scalar damage-plasticity concrete model is used in membrane elements to consider the compression-softening effect and the degradations of strength and stiffness. The Concrete01 and ReinforcingSteel are adopted as uniaxial materials for beam-column elements and truss elements. The numerical implementation of the AFSI-MBTEM for rectangular and circular RC hollow piers is illustrated. A series of RC thin-walled hollow piers with different failure modes under cyclic loading are collected for the validation. The predictions against experimental results indicate that the AFSI-MBTEM captures the cyclic responses of RC thin-walled hollow piers with excellent accuracy, convergence, and efficiency. However, the overestimations of yield plateau and energy dissipation along with the sudden drops at large ductility are observed in simulations by the flexure model. The dynamic responses of the full-scale hollow piers from 223 pulse-like motions further demonstrate the superiority of the AFSI-MBTEM. Meanwhile, the flexure model underestimates their dynamic responses due to the enhanced energy dissipation and the neglect of shear influence.
关键字
报告人
漆启明
讲师 成都大学

漆启明,博士,硕士生导师,从事桥梁抗震研究。目前主持四川省自然科学基金青年项目1项,发表SCI、EI论文30余篇。

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