Dynamic Analysis Procedures for Performance-Based Seismic Engineering of Buildings in Urban Areas

9812531 Chopra专业人士已经认识到结构设计需要满足既定的性能目标。一个主要的挑战是为结构的设计、验证、评价和质量控制开发简单而有效的分析方法，使它们切实满足选定的性能目标。本研究项目的总体目标是开发适用于下一代抗震规范和指导方针的动态分析程序，以设计新建筑和评估现有建筑。将制定以下层次结构：(i)设计或评估建筑物“完全运行”或“运行”性能水平的弹性分析程序，（ii）设计和评估建筑物“运行”、“生命安全”或“接近倒塌”性能水平的非弹性分析程序，以及（iii）评估每个程序的准确性和适用范围的标准。此外，将进行调查，以(1)从基本角度评估现有知识对近源地面运动的适用性；(2)推广现有的分析方法，或者，如果必要的话，开发出与近源激励完全不同的方法。该项目由日本研究人员和Degnenkolb工程师（CMS-9812573）共同完成。美国和日本的研究人员将使用两国记录的共同近源地面运动，并根据在过去地震中记录的共同结构的运动来校准他们的简化分析程序。该项目得到了CMS-INT联合倡议NSF 98-36“美日城市地震减灾合作研究”第一轮（1998财年）竞赛的支持。＊＊＊

9812531 Chopra It has been recognized by the profession the need for designing structures to meet stated performance goals. A major challenge is to develop simple, yet effective analytical methods for the design, verification, evaluation and quality control of structures so that they realistically meet the selected performance objectives. The overall objectives of this research project are to develop dynamic analysis procedures suitable for the next generation of seismic codes and guidelines to design new buildings and to evaluate existing buildings. A hierarchy of (i) elastic analysis procedures to design or evaluate buildings for "fully operational" or "operational" performance levels, (ii) inelastic analysis procedures to design and evaluate buildings for "operational," "life safe" or "near collapse" performance levels, and (iii) criteria to evaluate the accuracy and the range of applicability of each procedure will be developed. Further, investigations will be conducted to (1) evaluate, from a fundamental point of view, applicability of the present knowledge to near-source ground motions; and (2) generalize the existing analytical procedures or, if necessary, develop fundamentally different methods for near-source excitations. This project represents a collaborative effort with Japanese researchers and Degnenkolb Engineers, (CMS-9812573). Researchers in the U.S. and Japan will use common near-source ground motions recorded in both countries an calibrate their simplified analytical procedures against common structures whose motions have been recorded during past earthquakes. This project is supported under the first round (FY'98) competition of the joint CMS-INT initiative NSF 98-36, "US-Japan Cooperative Research in Urban Earthquake Disaster Mitigation." ***