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首页> 外文会议>6th International conference on advanced composite materials in bridges and structures 2012 >ANALYTICAL MODELING OF BOND BEHAVIOUR OF EMBEDDED THROUGH- SECTION FRP BAR SHEAR-STRENGTHENING METHOD
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ANALYTICAL MODELING OF BOND BEHAVIOUR OF EMBEDDED THROUGH- SECTION FRP BAR SHEAR-STRENGTHENING METHOD

机译：贯穿截面FRP棒抗剪加固方法的粘结行为解析模型

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摘要

The embedded through-section (ETS) technique was recently developed to avoid the debonding failure that occurs with other FRP strengthening techniques such as the externally bonded (EB) and near-surface-mounted (NSM) methods. The method offers greater confinement and leads therefore to a substantial improvement in bond performance. In addition, it requires less concrete preparation than the other strengthening techniques. In this paper, appropriate bond stress-slip models are developed to address the FRP/concrete interfacial behaviour of the ETS technique. The constitutive relations presented aim to identify a general law and to determine its parameters by curve fitting to experimental data. Among the analytical models suggested in the literature for the bond behaviour of FRP reinforced concrete, the Eligehausen, Popov, and Bertero modified model (BPE model) and the Cosenza, Manfredi, and Realfonzo model (CMR model) are compared with the experimental results obtained here. The CMR model with new fitting parameters is found to be an accurate way of simulating the experimental results. A new equation that accounts for concrete compressive strength, bar diameter and bar location is provided to estimate the development length.
机译：最近开发了嵌入式贯穿截面（ETS）技术，以避免其他FRP加固技术（例如外部粘合（EB）和近表面安装（NSM）方法）发生的脱胶失败。该方法提供更大的限制，并因此导致粘结性能的显着改善。此外，与其他加固技术相比，它需要的混凝土准备更少。在本文中，开发了适当的粘结应力-滑动模型来解决ETS技术的FRP /混凝土界面行为。提出的本构关系旨在确定一般规律并通过对实验数据进行曲线拟合确定其参数。在文献中针对FRP钢筋混凝土粘结性能提出的分析模型中，将Eligehausen，Popov和Bertero改性模型（BPE模型）以及Cosenza，Manfredi和Realfonzo模型（CMR模型）与获得的实验结果进行了比较。这里。发现具有新拟合参数的CMR模型是模拟实验结果的准确方法。提供了一个考虑混凝土抗压强度，钢筋直径和钢筋位置的新方程式，以估算展开长度。

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