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The Pushout Test of Seismic Reinforcement System (SRM) Connection that Respond to Earthquake Extensive Level
International Journal of Civil Engineering ( IF 1.7 ) Pub Date : 2020-07-28 , DOI: 10.1007/s40999-020-00544-1
Jung-hyun Hwang , Jong-ho Ock , Youngju Kim , Ji-wook Mauk , Jaehoon Bae

This paper introduces a state-of-the art seismic retrofit method (SRM) that has the resistance mechanism of eccentrically braced frames (EBF). In EBF, local failure is induced to the link beam such that other members remain in the elastic state when an earthquake load is applied. SRM works by attaching to an existing building in the form of an external frame to enhance its seismic performance. The seismic reinforcement of medium- and low-rise reinforced concrete buildings has a small inter-story drift; hence, the adhesion between the two materials has a great influence on the seismic reinforcement effect. In this study, a push-out test was performed to show the adhesion performance under various conditions. The performance of various attachment methods was also explored to improve adhesion with the RC structure for securing the performance of the SRM system. Additionally, this study proposes a shear strength equation that considers the influence of the contact direction of steel, increase in plate thickness, and anchor yield strength. The test results indicated that it can be used as a new shear strength equation as the error rate is within 10% compared to the experimental results. Although the web direct bonding method using end plates is disadvantageous in terms of processability, it showed the highest strength improvement results. Furthermore, the chemical anchor (Hilti) connection exhibited stable performance results regardless of the bonding method.

中文翻译:

抗震扩展级抗震加固系统(SRM)连接的顶出试验

本文介绍了一种最先进的抗震改造方法 (SRM),该方法具有偏心支撑框架 (EBF) 的抗力机制。在 EBF 中,当施加地震荷载时,连接梁会发生局部失效,从而使其他构件保持弹性状态。SRM 的工作原理是以外部框架的形式连接到现有建筑物上,以增强其抗震性能。中低层钢筋混凝土建筑抗震加固层间位移小;因此,两种材料之间的附着力对抗震加固效果有很大影响。在这项研究中,进行了推出测试以显示各种条件下的粘合性能。还探索了各种连接方法的性能,以提高与 RC 结构的附着力,以确保 SRM 系统的性能。此外,本研究提出了一个剪切强度方程,该方程考虑了钢的接触方向、板厚增加和锚栓屈服强度的影响。测试结果表明,与实验结果相比,其误差率在10%以内,可以作为一种新的剪切强度方程。虽然使用端板的腹板直接粘合方法在加工性方面存在缺陷,但它显示了最高的强度改进结果。此外,无论采用何种粘合方法,化学锚固 (Hilti) 连接都表现出稳定的性能结果。本研究提出了一个剪切强度方程,该方程考虑了钢的接触方向、板厚增加和锚栓屈服强度的影响。测试结果表明,与实验结果相比,其误差率在10%以内,可以作为一种新的剪切强度方程。虽然使用端板的腹板直接粘合方法在加工性方面存在缺陷,但它显示了最高的强度改进结果。此外,无论采用何种粘合方法,化学锚固 (Hilti) 连接都表现出稳定的性能结果。本研究提出了一个剪切强度方程,该方程考虑了钢的接触方向、板厚增加和锚栓屈服强度的影响。测试结果表明,与实验结果相比,其误差率在10%以内,可以作为一种新的剪切强度方程。虽然使用端板的腹板直接粘合方法在加工性方面存在缺陷,但它显示了最高的强度改进结果。此外,无论采用何种粘合方法,化学锚固 (Hilti) 连接都表现出稳定的性能结果。虽然使用端板的腹板直接粘合方法在加工性方面存在缺陷,但它显示了最高的强度改进结果。此外,无论采用何种粘合方法,化学锚固 (Hilti) 连接都表现出稳定的性能结果。虽然使用端板的腹板直接粘合方法在加工性方面存在缺陷,但它显示了最高的强度改进结果。此外,无论采用何种粘合方法,化学锚固 (Hilti) 连接都表现出稳定的性能结果。
更新日期:2020-07-28
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