The Whittier Narrows, California Earthquake of October 1, 1987—Response of Elevators

1988 ◽  
Vol 4 (2) ◽  
pp. 367-375 ◽  
Author(s):  
A. J. Schiff
Keyword(s):  
Seismic Performance ◽  
Coming Out ◽  
Earthquake Damage ◽  
Damage Potential ◽  
Relative Damage ◽  
San Fernando ◽  
Protection Devices ◽  
Earthquake Protection ◽  
Code Provisions

The Whittier Narrows earthquake has been the first earthquake to affect a significant number and many of the same elevator systems that now conform to the more stringent code provisions introduced after the 1971 San Fernando earthquake. While the relative damage potential of the two earthquakes is not now known, much less manchine room and rope damage was observed. The incidence of counterweights coming out of their guide rails was much less than it was from the San Fernando earthquake but still quite common. The performance and operation of elevator earthquake protection devices, seismic switches and counterweight derail detection devices, did not fully meet expectations but they did significantly reduce damage and the potential for injury. There was some inconsistency in the triggering of seismic switches. The seismic performance of elevators suggest that several changes to codes should be considered including a requirement to report earthquake damage and prevent seismic devices from being reset by unauthorized personnel.

scholarly journals Masonry performance in earthquakes

1974 ◽  
Vol 7 (4) ◽  
pp. 149-166
Author(s):  
O. A. Glogau
Keyword(s):  
Earthquake Damage ◽  
Structural Behaviour ◽  
Damage Potential ◽  
Timber Construction

Past and current methods describing the damage potential of an earthquake are reviewed and discussed in relation to actual earthquake damage. The performance of a number of structures subjected to intense shaking is described with particular reference to their detailing. Examples are given showing the effect of infilling walls on structural behaviour. Veneer on timber construction is discussed. The points made are illustrated with figures and photographs.

Analysis of Numerical Simulation for Seismic Performance of MMCs

2011 ◽  
Vol 284-286 ◽  
pp. 3-10
Author(s):  
Hui Ting Gao ◽  
Li Na Xu ◽  
Song He Meng ◽  
Zhan Yi Cao
Keyword(s):  
Numerical Simulation ◽  
Seismic Performance ◽  
Failure Process ◽  
Earthquake Damage

Earthquake damage of MMCs simulated by computer is a very valuable area. It can do large, prototype, repeated and destructive simulation. The failure process of the material and structural can be analyzed .The process of numerical simulation of Fe / Zn MMCs is first described in this paper.

The Evaluation and Analysis of Seismic Performance Based on Existing Structures

2014 ◽  
Vol 638-640 ◽  
pp. 1892-1895
Author(s):  
Xin Xin Yang ◽  
Feng Zhao ◽  
Hou Jun Xu
Keyword(s):  
Seismic Performance ◽  
Earthquake Damage ◽  
Prediction System ◽  
Characteristic Parameters ◽  
Existing Building ◽  
Damage Prediction ◽  
Existing Structures

This paper takes the seismic performance of the existing building evaluation in Wuhan, analysis of the existing building on the seismic performance, and extract a certain characteristic parameters for quick retrieval and identification, proposed the idea of the of earthquake damage prediction database, build and improve the based information of the construction earthquake damage prediction, establish a fast city buildings earthquake damage prediction system.

Under the Action of Earthquake Ancient Timber Building Column Small Feet Slip Phenomenon Analysis

2013 ◽  
Vol 353-356 ◽  
pp. 1930-1933
Author(s):  
Wen Di Tan ◽  
Li Zhu ◽  
Te Liang Yan
Keyword(s):  
Seismic Performance ◽  
Seismic Effect ◽  
Earthquake Damage ◽  
Slip Condition ◽  
Effect Evaluation ◽  
Performance Study ◽  
Ancient China ◽  
Performance Research ◽  
Slip Phenomenon

In ancient China timber building earthquake damage records, often about "column small feet slip", scholars in ancient timber buildings for the seismic performance study, also thought that "column small feet slip" is one of the reasons for the ancient building in the earthquake Could be survived. This article through to column small feet slip phenomenon, to lead to column small feet slip condition were analyzed, and "column small feet slip" seismic effect evaluation, is to the ancient timber aseismic performance research achievements added.

A Critical Comparison of Seismic Qualification Requirements for Safety Equipment in Various Codes and Standards

2003 ◽  
Author(s):  
F. G. Abatt ◽  
Quazi Hossain ◽  
Milon Meyer
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Lower Class ◽  
Department Of Energy ◽  
Building Structures ◽  
Performance Category ◽  
Code Provisions

Evaluation of life safety risks to facility occupants, public, and the environment that may result from earthquake events involves both building structures and equipment supported from these structures. But, it is the seismic design of building structures that typically receive the bulk of the attention from the code committees of the national professional organizations and the regulatory authorities. For safety related equipment in nuclear facilities (e.g., Seismic Category I equipment in nuclear power plants and Seismic Performance Category 3 and 4 equipment in the Department of Energy facilities), the seismic design and analysis guidelines and acceptance criteria are well established. But, for Nonseismic Category equipment in nuclear power plants and Seismic Performance Category 1 and 2 equipment in Department of Energy facilities, these have not yet been developed to the same level of completeness and rigor. The code provisions and guidelines available today for these lower class/categories of equipment are briefly, but critically discussed here, along with a comparison of the results of the application of these code provisions.

Seismic Response Analysis of CFRP Retrofitted Reinforced Concrete Structures

2013 ◽  
Vol 671-674 ◽  
pp. 1445-1457
Author(s):  
Bo Jin ◽  
De Feng Zu ◽  
Han Sheng Wu ◽  
Yongwu Gao
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Computational Models ◽  
Concrete Structures ◽  
Time History ◽  
Relative Displacement ◽  
Shaking Table ◽  
Response Analysis ◽  
Reinforced Concrete Structures ◽  
Damage Potential

The use of carbon reinforced polymer (CFRP) to provide lateral confinement for enhanced ductility and strength of reinforced concrete structures has been increasing. The present study, attempts to analytically investigate the effect of the layout of frame columns retrofitted with different layers of CFRP on the seismic performance and damage potential of structures under strong ground motion using realistic and efficient computational models. Based on the shaking table tests of several reinforced concrete (RC) flat slab beamless construction models, the seismic performance of structures strengthened with CFRP composites are investigated. The dynamic response of CFRP retrofitted structures and the components of the model, validation of the model, force-displacement relationship, relative displacement and the time history curves are studied. Then the rational effect of different CFRP layers is found.

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