BRIGE: Characterization of Translational and Rotational Strong Ground Motions in the Near-fault Region, and their Impact on the Dynamic Response of Buildings

这一扩大参与研究启动赠款(Brige)赠款为描述断层附近的平移和旋转强地面运动以及调查它们对建筑结构动态响应的影响提供了资金。这项研究的主要目的是：(1)研究近断层地区地面动态变形场的特征；(2)探讨构造体制和土壤条件对近断层地面运动幅值和频率特征的影响；(3)推导安装了基础隔震和被动耗能装置的建筑物在近断层地震激励下的分析和设计的阻尼系数；(4)研究对称和不对称建筑对近断层平移和扭转地面运动的非线性响应。如果成功，这一研究结果将改进震源附近平动和转动地震动的参数化，并有助于在基于性能的地震工程背景下评估它们对建筑物动力响应的影响。这项研究还将评估建筑设计规范中建议的阻尼系数和意外偏心水平的有效性。预计拟议的研究将增进地震工程和工程地震学领域的知识，并将加强高地震活动地区社区的安全。一项教育和推广计划将密切跟踪研究活动的发展。该计划包括让少数群体和代表性不足的群体在大学一级参与，并通过K-12外联活动，目的是扩大他们对数学、科学和工程的参与。

This Broadening Participation Research Initiation Grants in Engineering (BRIGE) grant provides funding for the characterization of the translational and rotational strong ground motions in the vicinity of the fault and for the investigation of their effects on the dynamic response of building structures. The primary objectives of this research are to (1) investigate the characteristics of the dynamic ground deformation field in the near-fault region, (2) explore the effects of tectonic regime and soil conditions on the amplitude and frequency characteristics of near-fault ground motions, (3) derive damping coefficients for the analysis and design of buildings equipped with base isolation and passive energy dissipation devices subjected to near-fault seismic excitations, and (4) investigate the nonlinear response of symmetric and asymmetric buildings to near-fault translational and torsional ground motions.If successful, the results of this research will improve the parameterization of the translational and rotational ground motions in the vicinity of the earthquake source and contribute to the evaluation of their effects on the dynamic response of buildings in the context of performance-based earthquake engineering. This research will also assess the effectiveness of damping coefficients and accidental eccentricity levels proposed in design codes for buildings. It is anticipated that the proposed research will advance the knowledge in the fields of earthquake engineering and engineering seismology, and will enhance the safety of communities in areas of high seismicity. An education and outreach plan will follow closely the development of the research activities. This plan includes the involvement of minorities and underrepresented groups at the university level and through K-12 outreach activities with the objective of broadening their participation in math, science and engineering.