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首页> 外文会议>Conference on Connections Between Steel and Concrete Vol.2 Sep 10-12, 2001 Stuttgart, Germany >NUMERICAL ANALYSIS OF GROUP EFFECT IN BONDED ANCHORS WITH DIFFERENT BOND STRENGTHS
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NUMERICAL ANALYSIS OF GROUP EFFECT IN BONDED ANCHORS WITH DIFFERENT BOND STRENGTHS

机译：具有不同粘结强度的粘结锚的群效应数值分析

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摘要

In recent years the failure behavior of group anchors has been investigated and the group effect for quadruple fastenings with bonded anchors has been clarified. However the performed work is available only for an average bond strength within 8 MPa to 12 MPa. No doubt, with the variation of the bond strength the group effect for bonded anchors should be influenced. In this paper the influence of the bond strength on the failure mode and the group effect is investigated. The investigation is carried out by performing a series of numerical analysis of single and quadruple fastenings with bonded anchors. In the calculation the concrete and the bond material are simulated by the improved microplane model, which is implemented in the 3D nonlinear finite element program MASA. Investigated are groups with bonded anchors (d =16 mm, h_(ef)= 96 mm) with a spacing s = 48 mm to s = 288 mm. Varied is the average bond strength (6.2, 11.1, and 22.5 MPa). From the results of the numerical study the influence of bond strength on the failure modes of groups with bonded anchors is revealed and the group effect as a function of the bond strength is clarified.
机译：近年来，对群锚的破坏行为进行了研究，并阐明了结合锚固的四重紧固的群效应。但是，仅在8 MPa至12 MPa的平均粘结强度下才能执行所执行的工作。毫无疑问，随着粘结强度的变化，粘结锚的基团效应应受到影响。本文研究了粘结强度对破坏模式和群效应的影响。通过对结合锚固件的单个和四个紧固件进行一系列数值分析来进行研究。在计算中，通过改进的微平面模型模拟混凝土和粘结材料，该模型在3D非线性有限元程序MASA中实现。研究的是具有间隔为s = 48 mm至s = 288 mm的锚定锚（d = 16 mm，h_（ef）= 96 mm）的组。平均粘合强度（6.2、11.1和22.5 MPa）不同。从数值研究的结果中，揭示了粘结强度对具有锚固锚固基团破坏模式的影响，并阐明了基团效应随粘结强度的变化。

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