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首页> 外文期刊>Structural Control and Health Monitoring >Simulating offset blast loads experimentally using shake‐ table‐generated ground motions: Method development and validation
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Simulating offset blast loads experimentally using shake‐ table‐generated ground motions: Method development and validation

机译：使用振动台产生的地震动实验性地模拟爆炸冲击载荷：方法开发和验证

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The experimental investigation of the effects of blasts and other impulsive-type loads on large-scale structures provides valuable data to inform design decisions for structures and structural control devices; however, this type of testing presents significant security, safety, logistical, and economic challenges. In particular, only a limited number of facilities are capable of blast testing of large-scale structures. In contrast, many structural engineering and structural control research projects now employ shake-table testing. With this in mind, the authors have developed a technique to experimentally simulate the global response of a large-scale, flexible structure subjected to blast loading using a shake-table-produced ground motion. A ground motion profile designed for experimental blast simulation is proposed, and an algorithm for shaping this ground motion, based on near equivalence of modal energy distribution, is presented. Validation is performed through a set of experimental studies on a laboratory-scale nine-story structure outfitted with a passive nonlinear structural control system. In the first part of the validation, explosive blast testing of the structure was performed at the US Army Corps of Engineers, Engineering Research and Development Center, Big Black Test Site; and in the second part, shake-table testing of the same structure using a synthesized ground motion was performed at the US Army Corps of Engineers, Engineering Research and Development Center, Construction Engineering Research Laboratory. Comparison of the two studies demonstrates that an appropriately designed, shake-table-produced ground motion can be employed to experimentally simulate the global response of a structure subjected to blast loading with reasonable accuracy with and without a nonlinear structural control system.
机译：爆炸和其他冲击型载荷对大型结构的影响的实验研究提供了有价值的数据，可为结构和结构控制设备的设计决策提供依据。但是，这种测试带来了重大的安全性，安全性，后勤和经济挑战。特别是，只有有限数量的设施能够对大型结构进行爆炸测试。相反，许多结构工程和结构控制研究项目现在都采用振动台测试。考虑到这一点，作者开发了一种技术，可通过振动台产生的地震动实验性地模拟承受爆炸载荷的大型柔性结构的整体响应。提出了一种为爆炸实验设计的地震动剖面，并提出了一种基于模态能量分布的近似等值线的地震动成形算法。验证是通过对一组配备有无源非线性结构控制系统的实验室规模的9层结构进行的实验研究来进行的。在验证的第一部分中，该结构的爆炸性爆炸测试是在美国陆军工程兵团，大黑试验场工程研究与开发中心进行的；第二部分，在美国陆军工程兵，工程研究与发展中心，建筑工程研究实验室中，使用合成的地面运动对同一结构进行了振动台测试。两项研究的比较表明，经过适当设计，由振动台产生的地面运动可以用于以合理的精度实验性地模拟爆炸冲击荷载作用下的结构的整体响应，无论是否带有非线性结构控制系统。

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