既有钢框架建筑的损伤检测和易损性分析

Damage Inspection and Vulnerability Analysis of Existing Buildings with Steel Moment-Resisting Frames

Northridge地震造成大量钢框架建筑在梁-柱焊接节点发生脆性破坏。对类似框架建筑的抗震性能进行研究,提出了几种旧建筑物修复或升级的课题。首先是可能发生焊接破坏的建筑范围的检测。第二是检测中所识别的连接断裂是否应该在允许长期使用前进行修复。第三是连接修复的费用。选择某既有钢框架中被检测的连接为目标函数,并提出了有效的方法,用于地震脆性评估。该方法的效率通过模拟两个钢框架建筑的部分检测过程来显示。最后,通过对建筑物的脆性分析为评估修复成本提供基础。

The Northridge earthquake caused a number of steel moment-resisting frame （SMRF） buildings to suffer brittle fractures in their beam-to-column welded connections, which raised the concern that similar （undetected） damage may have occurred in other SMRF buildings during past earthquakes in the region. Several issues may arise in decisions to rehabilitate or upgrade older buildings. One is the extent of building to inspect for possible weld fracturees. A second is whether fractured connections identified in inspection should be repaired before permitting longterm occupancy. A third is the connection repair cost.