Implication of Northridge Earthquake on 1994 NEHRP Provisions and Seismic Restraint Performance on Nonstructural Components

9416480宋楚瑜在大地震中观察到的非结构破坏在调查涉及非结构构件抗震性能的广泛研究问题方面发挥了重要作用。这些措施包括为非结构部件制定规范和规定，规定这些部件必须锚固或连接到主要结构上的安全水平，并为其锚固细节和约束制定抗震设计指南。这项研究项目的目标是评估北岭地震对以下两个具体和相互关联的研究问题的影响：(A)最近建议的1994年NEHRP关于非结构部件的规定。北岭损伤数据为评估力和位移公式中包含的各种动态效应系数的值提供了一个独特的机会。(B)受影响地区选定的一组地震约束的表现，其中一些是最近才开发出来的。北岭事件为评估它们在实际代码级地震下的表现提供了第一次机会。这项研究的结果将有助于更好地了解非结构构件在各种条件下的抗震性能。反过来，这些结果将导致开发出在地震环境中操作这些部件的更安全、更合理的设计指南。***

9416480 Soong Observed nonstructural damage during major earthquakes has played an important role in the investigation of a wide range of research issues dealing with seismic behavior of nonstructural components. These include the formulation of codes and provisions for nonstructural components which specify safety levels at which these components must be anchored or attached to a primary structure and the development of seismic design guidelines for their anchorage details and restraints. The objectives of this research project ar to assess the impact of the Northridge earthquake on the following two specific and interlocking research issues: (a) The recently recommended 1994 NEHRP provisions for nonstructural components. The Northridge damage data provides a unique opportunity for assessing the values assigned tovarious dynamic-effect factors contained in the force and displacement formulas. (b) The performance of a selected group of seismic restraints located in the affected area, some of which were only recently developed. The Northridge event provides the first opportunity for evaluating their performance under an actual code-level earthquake. The results of this research will lead to a better understanding of the seismic behavior of nonstructural components under a wide variety of conditions. In turn, these results will leade to the development of safer and more rational design guidelines for operating these components in a seismic environment. ***