白亮, 张淼, 杨磊, 胡帅, 包正福. 型钢高延性水泥基材料粘结性能试验研究与有限元分析[J]. 工程力学, 2021, 38(3): 98-111. DOI: 10.6052/j.issn.1000-4750.2020.04.0265
引用本文: 白亮, 张淼, 杨磊, 胡帅, 包正福. 型钢高延性水泥基材料粘结性能试验研究与有限元分析[J]. 工程力学, 2021, 38(3): 98-111. DOI: 10.6052/j.issn.1000-4750.2020.04.0265
BAI Liang, ZHANG Miao, YANG Lei, HU Shuai, BAO Zheng-fu. EXPERIMENTAL INVESTIGATION AND FINITE ELEMENT MODELING OF INTERFACE BOND-SLIP BEHAVIOR BETWEEN SHAPE STEEL AND ECC[J]. Engineering Mechanics, 2021, 38(3): 98-111. DOI: 10.6052/j.issn.1000-4750.2020.04.0265
Citation: BAI Liang, ZHANG Miao, YANG Lei, HU Shuai, BAO Zheng-fu. EXPERIMENTAL INVESTIGATION AND FINITE ELEMENT MODELING OF INTERFACE BOND-SLIP BEHAVIOR BETWEEN SHAPE STEEL AND ECC[J]. Engineering Mechanics, 2021, 38(3): 98-111. DOI: 10.6052/j.issn.1000-4750.2020.04.0265

型钢高延性水泥基材料粘结性能试验研究与有限元分析

EXPERIMENTAL INVESTIGATION AND FINITE ELEMENT MODELING OF INTERFACE BOND-SLIP BEHAVIOR BETWEEN SHAPE STEEL AND ECC

  • 摘要: 为了研究型钢与高延性水泥基材料(ECC)界面粘结滑移性能,对型钢ECC试件进行推出试验,分析PVA纤维掺量、横向箍筋配箍率、ECC保护层厚度及型钢锚固长度对型钢ECC试件破坏形态、荷载-滑移曲线及粘结应力的影响,提出粘结应力沿型钢锚固长度分布规律,研究表明:PVA纤维掺量和ECC保护层厚度对型钢ECC粘结应力影响较大,粘结应力最大值出现在靠近加载端的位置,随着荷载增大,等效粘结应力也相应增大。根据试验结果,建立不同状态下型钢ECC粘结应力计算表达式,提出粘结应力-滑移本构关系。在此基础上,利用非线性弹簧考虑型钢与ECC界面间的粘结性能,建立型钢ECC推出试件的有限元模型,并将有限元分析结果与试验结果进行对比,结果表明,该文提出的有限元模拟方法能够准确地分析型钢ECC的粘结滑移性能。

     

    Abstract: In order to study the interface bond-slip behavior between shape steel and Engineered Cementitious Composites (ECC), the shape steel-ECC specimens were designed to conduct push-out testing. The influences of the volume fraction of PVA fiber, stirrup reinforcement ratio, ECC cover thickness and shape steel embedment length on the failure modes, on the load-slip curves and on the bond stress of shape steel-ECC specimens were analyzed, also the bond stress distribution along steel embedded length was proposed. The result shows that the volume fraction of PVA fiber and ECC cover thickness have great influences on bond stress. The maximum bond stress occurred near the loading end, and the equivalent bond stress increased with the increase of the load. According to the test results, the expression of bond stress in different states were established, and the bond-slip constitutive laws were proposed. On this basis, the finite element model of shape steel-ECC specimens was established by using a nonlinear spring to simulate the interface bond-slip behavior between shape steel and ECC. The finite element analysis results were compared with the test results, which indicated that the finite element simulation method proposed could accurately analyze the interface bond-slip behavior of shape steel-ECC.

     

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