ABSTRACT

Given the high level of seismic activity across the Middle East and particularly Iran, loading history data and respective seismic records in the region are required to formulate regional loading protocols for proper estimation of seismic behavior of structural components in accordance with construction conditions in the area. This study aims to propose such a loading protocol for the seismic performance assessment of steel moment connections in both real and laboratory conditions. A study is done on all the earthquakes that took place in the region and more than 2000 modified records of earthquakes that occurred in Iran during the past four decades to prepare an appropriate list of far-field records for the region. Subsequently, nonlinear time history analyses were performed for 7-, 12-, and 20-story steel buildings and construction conditions in the region and damage parameters were obtained. With different analytical, statistical and numerical analyses on the damage parameters resulted in target values for formulating the loading protocol for the region. Finally, an appropriate loading protocol was proposed to evaluate the moment connections (including reduced beam section connections and welded unreinforced flange-welded web moment connections) considering the construction conditions of the structures as well as the seismic history of the region.

摘要

鉴于整个中东地区，尤其是伊朗的地震活动水平很高，需要该地区的加载历史数据和相应的地震记录来制定区域加载协议，以便根据该地区的施工条件正确估计结构部件的抗震性能。本研究旨在提出这样一种加载方案，用于在真实和实验室条件下对钢弯矩连接进行抗震性能评估。对该地区发生的所有地震以及过去四十年伊朗发生的 2000 多次地震的修改记录进行了研究，以准备该地区适当的远场记录列表。随后，对 7-、12-、并获得了该地区的20层钢结构建筑和施工条件及损伤参数。通过对损伤参数的不同分析、统计和数值分析，得出了用于制定该区域加载协议的目标值。最后，考虑到结构的施工条件以及该地区的地震历史，提出了一种适当的加载协议来评估力矩连接（包括减少梁截面连接和焊接无钢筋法兰焊接腹板力矩连接）。