力学与实践 ›› 2017, Vol. 39 ›› Issue (1): 35-39.DOI: 10.6052/1000-0879-16-207

• 应用研究 • 上一篇    下一篇

砖砌体双参数单轴受压弹塑性损伤力学模型

牛力军, 张文芳   

  1. 太原理工大学建筑与土木工程学院, 太原 030024
  • 收稿日期:2016-06-21 修回日期:2016-08-06 出版日期:2017-02-15 发布日期:2017-02-24
  • 通讯作者: 牛力军,讲师,硕士,主要从事工程结构抗震研究.E-mail:niulijun@tyut.edu.cn;张文芳,教授,博士生导师,主要从事工程结构抗震减震设计理论与应用研究.E-mail:zhangwenfang@tyut.edu.cn
  • 基金资助:

    国家自然科学基金(50978177)和山西省科技攻关项目(20110313026-3)资助.

UNIAXIAL COMPRESSION ELASTIC-PLASTIC DAMAGE MODEL WITH DOUBLE PARAMETERS OF BRICK MASONRY

NIU Lijun, ZHANG Wenfang   

  1. College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2016-06-21 Revised:2016-08-06 Online:2017-02-15 Published:2017-02-24

摘要:

参考弹塑性损伤模型理论和相关试验数据,建立了砖砌体单轴单调受压和重复受压两种弹塑性损伤本构模型.在模型中采用抗压强度和峰值压应变双参数来调整形变曲线,从而实现了砖砌体单轴受压本构模型的精细化建立.模型不但与既有弹塑性模型相符,而且还符合受压延性与强度呈反向变化的试验结论.重复受压加-卸载路径建立在卸载线性假定的基础上,参考两组试验数据,得出了双线性抗压刚度劣化函数,并通过强度线性插值来调整劣化速率,从而建立了随强度改变的受压加-卸载损伤本构模型.

关键词:

砖砌体|本构模型|损伤演变|重复载荷|数值模拟

Abstract:

This paper presents a damage constitutive model for masonry subjected to axial monotonic and cyclic compressive loading, based on related theories and test results. In order to establish flne lever models, double parameters consisting of the peak compressive strain and the strength are adopted to adjust the deformation curve. The uni-axial model presented is consistent with the existing elastic-plastic models, and the mechanical property of masonry materials that a higher strength generally leads to a lower ductility. Assuming that a unloading path of the cyclic constitutive model is linear, a bilinear deterioration function of the unloading compressive stifiness is established by utilizing two test results, and a linear interpolation of the compressive strength for the degradation rate that is permitted.

Key words:

masonry|constitutive relationship|damage model|cyclic loading|simulation

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