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Seismic design and evaluation of steel moment-resisting frames with compressed elastomer dampers

机译：带压缩弹性体阻尼器的钢制抗弯框架的抗震设计和评估

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This paper evaluates the hysteretic behavior of an innovative compressed elastomer structural damper and its applicability to seismic-resistant design of steel moment-resisting frames (MRFs). The damper is constructed by precompressing a high-damping elastomeric material into steel tubes. This innovative construction results in viscous-like damping under small strains and friction-like damping under large strains. A rate-dependent hysteretic model for the compressed elastomer damper, formed from a parallel combination of a modified Bouc-Wen model and a non-linear dashpot is presented. The model is calibrated using test data obtained under sinusoidal loading at different amplitudes and frequencies. This model is incorporated in the OpenSees [17] computer program for use in seismic response analyses of steel MRF buildings with compressed elastomer dampers. A simplified design procedure was used to design seven different systems of steel MRFs combined with compressed elastomer dampers in which the properties of the MRFs and dampers were varied. The combined systems are designed to achieve performance, which is similar to or better than the performance of conventional steel MRFs designed according to current seismic codes. Based on the results of nonlinear seismic response analyses, under both the design basis earthquake and the maximum considered earthquake, target properties for a new generation of compressed elastomer dampers are defined.
机译：本文评估了一种创新的压缩弹性体结构阻尼器的磁滞行为及其在钢制抗弯框架（MRF）的抗震设计中的适用性。通过将高阻尼弹性材料预压缩到钢管中来构造阻尼器。这种创新的结构可在小应变下产生类似粘性的阻尼，而在大应变下产生类似摩擦的阻尼。提出了压缩弹性体阻尼器的速率相关滞后模型，该模型由改进的Bouc-Wen模型和非线性阻尼器的并行组合形成。使用在正弦负载下以不同幅度和频率获得的测试数据对模型进行校准。该模型被整合到OpenSees [17]计算机程序中，用于带有压缩弹性体阻尼器的MRF钢结构房屋的地震响应分析。使用简化的设计程序来设计七个不同的钢制MRF与压缩弹性体阻尼器组合的系统，其中MRF和阻尼器的性能有所变化。设计组合系统以实现性能，该性能类似于或优于根据当前地震法规设计的常规钢MRF的性能。基于非线性地震响应分析的结果，在设计基准地震和最大考虑地震的情况下，定义了新一代压缩弹性体阻尼器的目标特性。

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