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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Concept and performance testing of a high-capacity oil damper comprising multiple damper units
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Concept and performance testing of a high-capacity oil damper comprising multiple damper units

机译：包含多个阻尼器单元的大容量机油阻尼器的概念和性能测试

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There has been a significant increase in the size of building structures in recent years. Huge structures such as high-rise buildings and large-domed stadiums require high-performance structural control, including the use of high-capacity dampers, especially in an earthquake-prone country like Japan. The objective of the present study was the enhancement of both human and structural safety in such structures through the development of a rate-dependent type of damper with a high damping capacity. Among the various available types of rate-dependent dampers, the authors focused on the oil damper owing to its stable performance against long-duration vibrations. The target maximum damping force was 6000kN, which is higher than that of any existing oil damper utilized in building structures. The authors developed a novel concept for achieving this high capacity while maintaining the size of the damper within acceptable dimensions from an architectural point of view. The concept involves the use of multiple damper units that produce mechanically parallel damping forces spatially arranged in series. As a prototype, a 1500-kN oil damper was fabricated by combining three 500-kN dampers. The 1500-kN prototype damper was conceived as a full-scale prototype of a damper that is more slender than comparable commercially available dampers in Japan, and as a scaled model of the proposed 6000-kN damper. Sinusoidal loading tests were conducted on the prototype damper using a frequency range of 0.1-1.5Hz and a velocity range of 0.4-300mm/s. The results confirmed that the damper produced the design damping forces. The results of earthquake loading tests also revealed that the damper exerted a stable damping force against a large earthquake and maintained its performance after the earthquake. The damper is particularly effective against earthquakes with long-period components that could increase the temperature of a damper. This is afforded by its high heat capacity compared to conventional dampers. Considering that the proposed 6000-kN damper will generate a damping force that is about 2-3 times that of the strongest conventional oil damper, existing manufacturer test machines would be inadequate for evaluating its full performance characteristics. To address this issue, the authors also propose a test method for evaluating the overall damping force. The method is premised on the fact that the characteristic feature of the proposed damper is its combination of multiple damper units. The overall performance is thus evaluated using the test results for the individual damper units while the other dampers are bypassed. This method was verified by the results of the abovementioned sinusoidal loading tests, with the error for the 1500-kN prototype damper found to be less than 5%. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：近年来，建筑结构的尺寸已显着增加。高层建筑和大型体育场等大型结构需要高性能的结构控制，包括使用大容量的阻尼器，尤其是在地震多发的国家（如日本）。本研究的目的是通过开发具有高阻尼能力的速率相关型阻尼器来提高此类结构的人身安全和结构安全性。在各种类型的速率相关阻尼器中，作者着眼于机油阻尼器，因为它具有稳定的抗长时间振动性能。目标最大阻尼力为6000kN，高于建筑结构中使用的任何现有油阻尼器。作者提出了一种新颖的概念，以实现这种高容量，同时从架构的角度将阻尼器的尺寸保持在可接受的尺寸之内。该概念涉及使用多个阻尼器单元，这些阻尼器单元产生在空间上串联布置的机械平行阻尼力。作为原型，通过组合三个500 kN的阻尼器制造了1500 kN的油阻尼器。 1500 kN原型阻尼器被认为是比日本市场上可买到的阻尼器更细长的阻尼器的全尺寸原型，并且是拟议的6000 kN阻尼器的比例模型。在原型减震器上进行了正弦负载测试，使用的频率范围为0.1-1.5Hz，速度范围为0.4-300mm / s。结果证实阻尼器产生了设计阻尼力。地震载荷试验的结果还表明，该阻尼器在大地震中施加稳定的阻尼力，并在地震后保持其性能。减震器特别有效地抵抗带有可能会升高减震器温度的长期部件的地震。与传统的风门相比，它具有很高的热容量。考虑到拟议的6000-kN阻尼器将产生的阻尼力约为最强的传统机油阻尼器的2-3倍，因此现有的制造商测试机将不足以评估其全部性能。为了解决这个问题，作者还提出了一种评估整体阻尼力的测试方法。该方法的前提是，所提出的减振器的特征是多个减振器单元的组合。因此，在旁路其他风门的同时，使用各个风门单元的测试结果评估整体性能。通过上述正弦载荷测试的结果验证了该方法，发现1500kN原型阻尼器的误差小于5％。版权所有（c）2016 John Wiley＆Sons，Ltd.

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