Computational Methods in Earthquake Engineering - Volume 2
Computational Methods in Earthquake Engineering - Volume 2
复制标题
地震工程计算方法 - 第 2 卷
DOI：
10.1007/978-94-007-6573-3_12
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Dimitrakopoulos E
中科院分区：
文献类型：
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作者：
Dimitrakopoulos E
许多结构在地震中表现出摇摆行为，因此仍有必要对这些结构进行翻新，以防止倒塌。人们对独立摇摆结构的行为进行了深入的研究，但关于改建摇摆结构响应的理论研究相对较少。在实践中，尽管允许摇摆运动的好处，摇摆行为通常是防止的，而不是优化的。这项研究通过解析模型描述了有阻尼摇摆运动的基本行为。利用单一摇块分析模型确定最优粘性阻尼特性，充分发挥摇摆运动的优点，同时耗能和防止倾覆倒塌。为了阐明减振的好处，给出了有阻尼摇块的倾覆包络，并与自由摇块的相关包络进行了比较。文中还给出了验证分析模型的初步实验工作。最后，将用阻尼控制摇摆行为的相同原理推广到一类特殊的摇摆问题，即砖石拱形结构的动力学。文中给出了该方法在砌体拱桥中的试验应用。
Numerous structures exhibit rocking behavior during earthquakes and there is a continuing need to retrofit these structures to prevent collapse. The behavior of stand-alone rocking structures has been thoroughly investigated, but there are relatively few theoretical studies on the response of retrofitted rocking structures. In practice, despite the benefits of allowing rocking motion, rocking behavior is typically prevented instead of optimized. This study characterizes the fundamental behavior of damped rocking motion through analytical modeling. A single rocking block analytical model is utilized to determine the optimal viscous damping characteristics which exploit the beneficial aspects of rocking motion while dissipating energy and preventing overturning collapse. To clarify the benefits of damping, overturning envelopes for the damped rocking block are presented and compared with the pertinent envelopes of the free rocking block. Preliminary experimental work to verify analytical modeling is also presented. Finally, the same principles of controlling rocking behavior with damping are extended to a particular class of rocking problems, the dynamics of masonry arches. A pilot application of the proposed approach to masonry arches is presented.