钢筋混凝土柱的非弹性恢复力模型与参数识别

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (21) : 229-235.

论文

余波1 李长晋1 吴然立1

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Inelastic Restoring Force Model and Parameter Identification Method for Reinforced Concrete Column

YU Bo 1 LI Chang-jin 1 WU Ran-li 1

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摘要

结合Bouc-Wen-Baber-Noori (BWBN) 模型和微分进化(DE)算法，提出了一种能够有效考虑强度退化、刚度退化和捏拢效应等典型滞回特性的钢筋混凝土(RC)柱的非弹性恢复力模型及其参数识别方法，并讨论了破坏模式对RC柱非弹性恢复力模型参数的影响规律。分析结果表明，该模型能够较好地描述弯曲、弯剪和剪切破坏模式下RC柱的典型滞回特性；基于DE算法能够较好地识别RC柱的非弹性恢复力模型参数，具有收敛速度快、识别精度高和全局优化性强等优点；RC柱的非弹性恢复力模型参数与破坏模式密切相关，随着RC柱的破坏模式从弯曲破坏到弯剪破坏和剪切破坏的变化，强度退化、刚度退化、捏拢总滑移量、捏拢斜率等参数均逐渐增大，说明剪切破坏型RC柱的退化效应和捏拢效应更加明显。

Abstract

The inelastic restoring force model and its parameter identification method for reinforced concrete (RC) column were developed by combining the differential evolution (DE) algorithm with the Bouc-Wen-Baber-Noori (BWBN) model, which takes into account the typical hysteretic behaviors such as strength degradation, stiffness deterioration and pinching effect. The influences of failure modes on the model parameters of inelastic restoring force of RC column were also discussed. The analysis results indicate the hysteretic behaviors of restoring force of RC column can be described rationally by the proposed inelastic restoring force model. The proposed method for the parameter identification of RC column is of rapid convergence speed, high accuracy and strong capability of global optimization. The failure mode has a significant effect on the model parameters of inelastic restoring force of RC column. The model parameters including strength degradation, stiffness deterioration, total slip of pinching and pinching slop increase gradually, when the failure mode changes from the flexure failure to flexure-shear failure and shear failure, which implies that the deteriorations and pinching effect of the shear critical column are more obvious than those of the flexure or flexure-shear critical column.

导出引用

余波1 李长晋1 吴然立1. 钢筋混凝土柱的非弹性恢复力模型与参数识别[J]. 振动与冲击, 2016, 35(21): 229-235

YU Bo 1 LI Chang-jin 1 WU Ran-li 1. Inelastic Restoring Force Model and Parameter Identification Method for Reinforced Concrete Column[J]. Journal of Vibration and Shock, 2016, 35(21): 229-235

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