NEXT PLUS: Seismic Assessment Procedures

9423596康奈尔该项目的主要目标是开发短期（正在进行中）和长期程序的简洁，明确，但严格的，现实的多自由度（MDOF）结构的非线性行为的概率分析的表示，并证明其适用性在建筑实践领域应用它们作为现有的结构。将研究多自由度结构的荷载折减系数R的概念;该R系数反映了结构和地震记录的弹性后动力相互作用。 这项任务将确定该R因子对偶数量级和距离的依赖程度，从而确定何时需要进行特定场地分析。 还将研究损伤测量和框架/基础问题的依赖性。 在大多数情况下，现有的（线性单自由度为基础的）地震危险图将足以应用这些程序;可能包含的主要部分的灾害相关的问题。 该程序将反映非线性响应和容量的额外不确定性。 该项目将提供对结构非线性行为及其对地震因素的依赖性的新认识。 它将为建筑设计专业对一套实用程序的需求提供重要的答案;它将为当前的建筑设计提供机械和概率上国际一致的格式。 ***

9423596 Cornell The project's primary objectives are to develop near-term (on going) and longer-term procedures for succinct, explicit, yet rigorous, representation of the probabilistic analysis of nonlinear behavior of realistic multi-degree-of- freedom (MDOF) structures and to demonstrate their applicability in the domain of building practice by applying them as existing structures. The concept of the load reduction factor, R, for multidegree-of-freedom structures will be studied; this R-factor captures the post-elastic, dynamic interaction of the structures and the earthquake record. This task will determine the degree to which this R factor depends on even magnitude and distance, and hence when it might require Site-specific analysis. Dependence on damage measure and frame/foundation issues will also be studied. In most cases existing (linear single degree-of- freedom based) seismic hazard maps will be adequate for application of these procedures; may contain the dominant portions of the hazard-related issues. The procedures will reflect the additional uncertainties in nonlinear response and capacity. The project will provide new understanding about nonlinear behavior of structures and their dependence on seismological factors. It will produce significant answers to the building design profession's need for a set of practical procedures; it will provide to current building design formats that are internationally consistent both mechanically and probabilistically. ***