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Relaxation method for pounding action between adjacent buildings at expansion joint

机译：伸缩缝相邻建筑物之间碰撞作用的松弛方法

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摘要

Earthquake-induced structural pounding frequently causes serious damage to buildings, particularly at the expansion joint (hereafter, EXPJ) between adjacent buildings. Because the EXPJ width in existing reinforced concrete buildings is usually very small, typically about 5 cm for school buildings in Japan, collision avoidance cannot be achieved by seismic retrofitting. This paper presents an experimental investigation into an effective method for reducing severe structural damage due to pounding at the EXPJ between narrowly separated buildings. The method involves inserting a shock-absorbing material such as rubber into the EXPJ gap. The efficiency of the proposed method is evaluated by laboratory shaking tests using two model buildings. Furthermore, a lumped mass model is used to carry out a collision analysis in order to numerically investigate the influence of such a shock-absorbing material. Both the numerical and experimental results confirm the effectiveness of the proposed approach. The validity of the proposed method is also demonstrated by numerical simulation of adjacent 10-story steel buildings with an EXPJ width of 5 cm. The force, acceleration and velocity produced by earthquake-induced structural pounding are found to be remarkably mitigated by inserting a soft shock-absorbing material into the EXPJ gap.
机译：地震引起的结构撞击通常会严重损坏建筑物，尤其是相邻建筑物之间的伸缩缝（以下称EXPJ）。由于现有钢筋混凝土建筑中的EXPJ宽度通常很小，在日本的学校建筑中通常约为5厘米，因此通过地震改造无法避免碰撞。本文提出了一种实验方法，以研究一种有效的方法来减少由于狭窄的建筑物之间的EXPJ撞击而造成的严重结构损坏。该方法涉及将诸如橡胶的减震材料插入EXPJ间隙中。通过使用两个模型建筑物的实验室振动测试来评估所提出方法的效率。此外，为了对这种减震材料的影响进行数值研究，使用集总质量模型进行碰撞分析。数值和实验结果均证实了该方法的有效性。该方法的有效性还通过对EXPJ宽度为5 cm的相邻10层钢结构建筑物的数值模拟来证明。通过将柔软的减震材料插入EXPJ缝隙，可以显着减轻地震引起的结构撞击产生的力，加速度和速度。

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