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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
考虑复杂应变历史的钢材修正双曲面滞回模型
王彤1,谢旭1,唐站站1,沈赤2
1. 浙江大学 建筑工程学院,浙江 杭州 310058; 2. 株式会社长大 海外事业部,日本 茨城 305-0812
Modified two-surface steel hysteretic model considering complex strain history
WANG Tong1, XIE Xu1, TANG Zhan-zhan1, SHEN Chi2
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; 2. International Project Group, Chodai Co., Ltd.,  Ibaraki 305-0812, Japan
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摘要：

针对兼顾精度和计算效率的钢材弹塑性滞回本构模型——修正双曲面模型在复杂应变历史条件下,由于弹-塑性过渡时塑性模量无穷大导致的应力计算结果不合理的缺陷,通过改进应力-应变路径的判别准则,对既有修正双曲面模型进行再修正,分别给出单轴应力状态和三维应力状态下的改进方法.通过与钢材单轴拉压试验结果的对比以及一系列相关算例的对比分析,证明了采用经改进后的双曲面滞回模型能够精确地模拟钢材在复杂应变历史条件下的滞回特性,从材料和结构构件2个层面验证了该改进方法的准确性和适用性.结果表明,对既有修正双曲面模型的改进能够有效地提高模型在复杂应变历史下的应力计算精度.
Abstract:

The shortcomings of modified two-surface hysteretic model, which is a steel elasto-plastic hysteretic constitutive model that consider both analysis accuracy and efficiency, were taken as research object. The problem that under complex strain history, sometimes the stress results obtained by the model are irrational since the plastic modulus at the critical point between elastic and plastic stage tends to infinite, was to be avoid. The existing modified two-surface model was remodified by improving its criterion of stress-strain path. The improving method of the analysis model under uniaxial and multiaxial stress state was given. The comparison results with analysis results and uniaxial tensile and compression tests, and a series of example analysis show that the improved model can precisely predict the hysteretic property of steel under complex strain history. The accuracy and applicability of the improving method were validated at material and structural member level. Results show that improvement of existing modified two-surface model can effectively raise the computational precision under complex strain history of the model．
出版日期: 2015-09-10
:  U 443  
基金资助:

国家自然科学基金资助项目(51378460)
通讯作者: 谢旭，男，教授     E-mail: xiexu@zju.edu.cn
作者简介: 王彤(1988-)，男，博士生，从事桥梁和钢结构抗震研究. E-mail: wangtong@zju.edu.cn
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王彤, 谢旭, 唐站站, 沈赤. 考虑复杂应变历史的钢材修正双曲面滞回模型[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.07.015.

WANG Tong, XIE Xu, TANG Zhan-zhan, SHEN Chi. Modified two-surface steel hysteretic model considering complex strain history. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.07.015.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2015.07.015    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I7/1305

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