Use of Loma Prieta Data to Evaluate, Understand and Improve Seismic Provisions of Elevator Codes

这是洛马普里埃塔地震(1989年10月)后的一次调查项目，目的是从这一破坏性事件中吸取教训。这个项目集中在电梯在地震中的抗震性能，并将这一学习与当前的电梯规范要求联系起来。一项损坏调查表明，洛马普里塔地震已经造成了广泛的电梯损坏，尽管造成这些问题的设计细节尚不清楚。显然，地震开关在加利福尼亚州是可选的，但国家规范要求地震开关没有按预期运行。这次地震为识别现行电梯规范的不足之处，提高我们对电梯抗震性能的认识提供了机会。几栋遭遇电梯损坏的建筑将被选为代表一系列配置、结构系统、电梯设备类型和位置的建筑。将根据专家访谈的损坏细节对电梯进行详细检查。将根据观察到的损坏和建议的更改对规范条款进行评估。最后，对影响地震安全装置性能的故障进行评估。这项研究将升级现行规范对电梯系统抗震安全的要求。

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. This project concentrates on the seismic performance of elevators during the earthquake and relates this learning to the current elevator code requirement. A damage survey indicates that the Loma Prieta earthquake has caused extensive elevator damage, although the design details that contributed to the problems are not known. It is clear that seismic switches, optional in California but required for the National code, did not performed as intended. This earthquake provides an opportunity to identify the deficiencies of current elevator codes and improve our understanding of the seismic performance of elevators. Several buildings that experienced elevator damages will be selected to represent a range of configurations, structural systems, types of elevator equipment, and locations. A detailed inspection of elevators will be made based on damage details from expert interviews. Code provisions will be evaluated in light of observed damage and changes suggested. Finally, the malfunctions effecting the performance of seismic safety devices will be evaluated. This study will upgrade the current code requirements governing the seismic safety of elevator systems.