力学与实践 ›› 2018, Vol. 40 ›› Issue (3): 281-288.DOI: 10.6052/1000-0879-17-347

• 应用研究 • 上一篇    下一篇

基于扩展有限元法的钢筋混凝土梁裂纹扩展的数值模拟

夏雨, 周诗博,龙嘉欣,李靖   

  1. 广西科技大学土木建筑工程学院,广西柳州545006
  • 收稿日期:2017-10-16 修回日期:2018-01-18 出版日期:2018-06-15 发布日期:2018-07-17
  • 作者简介:2) 夏雨,教授,研究方向为结构安全度评价。E-mail:summ-rain@163.com

NUMERICAL SIMULATION OF CRACK GROWTH OF REINFORCED CONCRETE FLEXURAL MEMBERS BASED ON XFEM1)

XIA Yu, ZHOU Shibo, LONG Jiaxin ,LI Jing   

  1. School of Architecture and Civil Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, China
  • Received:2017-10-16 Revised:2018-01-18 Online:2018-06-15 Published:2018-07-17
  • Contact: 1) 国家自然科学基金(51569005,51469005),广西自然科学基金(2015GXNSFAA139279),广西科技大学研究生教育创新计划(GKYC201711),广西国家级大学生创新创业训练(201710594046),广西自治区级大学生创新创业训练(201710594174,201710594180)资助项目

摘要:

基于最大主应力准则,利用扩展有限元法对钢筋混凝土三点弯曲梁的裂纹扩展进行数值模拟。通过与已有模型试验结果的比对,验证了该方法的准确性与有效性。研究发现,带裂纹钢筋混凝土构件的裂纹扩展与力学性能不但受到单裂纹的尺寸、位置、倾角的影响,而且还受多裂纹间位置关系的影响;其中,裂纹横向分布位置和裂纹纵向分布位置是影响带裂纹钢筋混凝土梁裂缝扩展的主要因素。

关键词:

钢筋混凝土,裂纹扩展,扩展有限元法,三点弯曲梁

Abstract:

Based on the maximum principal stress criterion, the crack propagation of reinforced concrete three point bending beams are simulated with the XFEM (extended ˉnite element method). The accuracy and the effectiveness of the proposed method are veriˉed by comparing with the results of the existing model test. It is shown that the crack growth and the mechanical properties of the reinforced concrete members with cracks are not only affected by the size, the position, the inclination angle of the single crack, but also affected by the location of the cracks. The transverse and longitudinal distributions of cracks are the main factor that affects the crack growth path and the mechanical properties of the reinforced concrete beams with cracks.

Key words:

reinforced concrete, crack propagation, extended ˉnite element method, three point bending beam

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