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Retrofit scheme of FRP jacketing system for blast damage mitigation of non- ductile RC building frames

机译:非延展性RC建筑帧的爆炸损伤爆破损伤系统改造方案

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摘要

Non-ductile reinforced concrete building structures built before the 1970s have been significantly damaged and collapsed under man-made disasters (e.g., blast loads) due to their inadequate column details. The structural deficiencies can be mitigated by a fiber-reinforced polymer jacketing system. This research investigated the blast performance of a low-rise non-ductile building frame strengthened with the jacketing system. Based on the investigation, a retrofit scheme was established to mitigate the blast-induced damage and maximize the effectiveness of the retrofit system. The retrofitted models varied with the main parameters of the retrofit system associated with the confinement effect and flexural stiffness, and blast simulation was performed under various loading scenarios. The retrofit effect was examined in terms of confinement and stiffness ratios. Since the effects of the retrofit parameters on the blast performance depend on the blast loads, the retrofit scheme needs to be established in terms of expected blast loading scenarios.
机译:由于其柱状细节不足,在20世纪70年代之前建造的非延展钢筋混凝土建筑结构在人造灾害(例如,爆破载荷)下被显着损坏和折叠。结构缺陷可以通过纤维增强的聚合物护套系统来减轻。本研究调查了用夹套系统加强了低层非延展构建框架的喷射性能。基于调查,建立了一种改造方案,以减轻爆炸造成的损伤并最大限度地提高改造系统的有效性。改造的模型随着与限制效果和弯曲刚度相关的改造系统的主要参数而变化,并在各种加载方案下进行爆炸仿真。根据限制和刚度比检查改造效果。由于改造参数对爆炸性能的影响取决于爆破载荷,因此需要在预期的爆炸加载方案方面建立改造方案。

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