基于内聚力模型的钢筋混凝土梁断裂模拟
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TU375.1

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河北省自然科学基金青年项目(No. D2019202440);国家自然科学基金青年项目(No.41807277)


Fracture simulation of reinforced concrete beams based on cohesion model
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the Natural Science Foundation of Hebei Province(No.D2019202440 );the National Natural Science Foundation of China(No.41807277)

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    摘要:

    针对钢筋混凝土梁裂纹扩展问题,本文介绍了一种内聚力模型的方法来模拟钢筋混凝土梁在静态条件下的断裂行为。利用Python开发的计算机程序,通过在有限元模型中插入内聚力单元,并分别对三点弯曲素混凝土梁的Ι型断裂失效模式和L型混凝土板混合断裂失效模式进行模拟,验证了内聚力模型在素混凝土结构中的适用性。在此基础上展开对四点弯曲的钢筋混凝土梁断裂过程模拟,通过分析钢筋混凝土梁的裂纹扩展过程和荷载—挠度曲线,并与文献中的试验结果进行比对,计算结果与试验结果吻合较好。可见该方法适合于钢筋混凝土梁的断裂失效模拟。

    Abstract:

    In order to solve the problem of crack propagation of reinforced concrete beam, a cohesive model is applied to simulate the static failure behavior of reinforced concrete beams. cohesion elements are inserted into The finite element model by a computer program developed in Python to simulate the Ι type failure mode of three-point bending plain concrete beam and the mixed fracture failure mode of L-shaped concrete slab, the applicability of cohesion model in plain concrete structure is verified. On this basis, the fracture process of reinforced concrete beams with four-point bending is simulated to analyze the crack propagation process and load- deflection curve of reinforced concrete beams. Compared with the test results in the literature, the calculated results are in good agreement with the test results. It can be seen that this method is suitable for fracture failure simulation of reinforced concrete beams.

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胡响,武杰,张宝虎. 基于内聚力模型的钢筋混凝土梁断裂模拟[J]. 科学技术与工程, 2021, 21(33): 14281-14286.
Hu Xiang, Wu Jie, Zhang Baohu. Fracture simulation of reinforced concrete beams based on cohesion model[J]. Science Technology and Engineering,2021,21(33):14281-14286.

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  • 收稿日期:2021-04-04
  • 最后修改日期:2021-09-06
  • 录用日期:2021-08-23
  • 在线发布日期: 2021-11-23
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