基于损伤理论的型钢与混凝土界面损伤分析

王斌; 郑山锁; 李磊

doi:10.13204/j.gyjz201004024

基于损伤理论的型钢与混凝土界面损伤分析

doi: 10.13204/j.gyjz201004024

1.
西安建筑科技大学土木工程学院,西安 710055

基金项目:

国家自然科学基金重大研究计划培育项目(90815005);国家自然科学基金面上项目(50978218)

详细信息

作者简介:
王斌，男，1983年出生，博士研究生。E－mail:wangbin1853@163.com

中图分类号: TU398.9
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- 文章访问数: 85
- HTML全文浏览量: 5
- PDF下载量: 82
- 被引次数: 0
出版历程
- 收稿日期: 2009-10-20
- 刊出日期: 2010-04-20

DAMAGE THEORY-BASED INTERFACIAL DAMAGE ANALYSIS OF SHAPED STEEL AND CONCRETE

1.
Xi’an University of Architecture &Technology,Xi’an 710055,China

摘要

摘要: 基于连续介质损伤力学理论，给出能够较好描述混凝土力学特性的损伤本构模型，同时，根据型钢应变的发展以及屈曲影响，建立型钢损伤本构模型。依据大量实腹式型钢混凝土试件粘结滑移性能试验研究结果，对粘结强度与滑移量值之间的变化关系进行分析，进而建立一种基于损伤理论的型钢与混凝土界面损伤-s模型来合理考虑粘结损伤对构件力学性能的影响，并验证其合理性。最后，通过数值模拟对型钢混凝土梁试件进行分析，将所得结果与已有粘结-滑移本构模型计算所得结果以及试验所得结果进行对比分析。结果表明，所提出的粘结损伤-s模型较已有模型能更好地反映型钢与混凝土界面的粘结退化对结构构件性能的影响，其数值方法是有效的。研究结果可为型钢混凝土组合结构地震作用下的非线性分析提供理论基础。
- 粘结强度 /
- 滑移量值 /
- 型钢混凝土 /
- 界面损伤模型 /
- 数值模拟
Abstract: The damage constitutive law of concrete,which can better describe the mechanical characteristics of concrete,is introduced according to the continuum damage mechanics theory. Meanwhile,the damage constitutive law of steel is established by taking account of the plastic strain development and buckling effect of steel. Based on large numbers of the experimental results of pull-out specimens on bond-slip behaviors between steel and concrete,the relationship between bond strength and the value of slip is analyzed. A coupled interfacial bond damage -s model is established and the evolution characteristic equation of bond damage is put forward?through introducing a damage variable to consider the effect of bond degeneration between steel and concrete. Numerical results of SRC beam specimens analyzed by finite element numerical simulation are compared with experimental results and calculation results obtained by existing research. The results show the bond damage -s model herein established can better reflect the effect of interfacial bond degradation between steel and concrete for structural elements,so the numerical method is effective. All these may supply theoretical basis for the nonlinear numerical analysis of SRC composite structures under earthquake.
- bond strength /
- value of slip /
- SRC /
- interface damage model /
- numerical modeling

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参考文献(16)

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