李艳艳1,2,李 强3,涂金龙1,2,刘 坤4
聚丙烯纤维混凝土梁试验研究及非线性数值分析
李艳艳1,2,李 强3,涂金龙1,2,刘 坤4
摘 要:为研究聚丙烯纤维混凝土结构的受力性能,对6根不同掺入量的聚丙烯纤维混凝土梁进行了试验研究,并利用ANSYS有限元分析软件对其受力过程进行了非线性数值仿真模拟。研究结果表明:掺入聚丙烯纤维的混凝土梁裂缝宽度较相同条件下未掺入聚丙烯纤维的混凝土梁小,聚丙烯纤维能够提高混凝土梁的抗裂性能;配置HRB500级钢筋的聚丙烯纤维混凝土梁在使用阶段能够满足《混凝土结构设计规范》(GB 50010-2010)裂缝宽度限值的要求;非线性有限元数值模拟结果与试验结果吻合较好,该方法能够有效地模拟聚丙烯纤维混凝土梁的受力过程。
Abstract: In order to investigate the mechanical properties of polypropylene fiber reinforced concrete structure, 6 polypropylene fiber reinforced concrete beams which have different dosages of polypropylene fiber are analyzed, and using the finite element analysis software ANSYS, nonlinear numerical simulation for the process of experiment is carried out. The results show that the crack widths of polypropylene fiber concrete beam are smaller than the unincorporated ones, the polypropylene fiber can improve the crack resistance of concrete beams. The polypropylene fiber concrete beams reinforced with HRB500 can meet to the requirements of the crack width limits of "Design Specification of Concrete Structures" (GB 50010-2010) during the using phase. And the nonlinear finite element numerical simulation agrees well with the experimental results, which indicates that this method can effectively simulate the force process of polypropylene fiber reinforced concrete beams.
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