scispace - formally typeset
Search or ask a question
Topic

Earthquake resistant structures

About: Earthquake resistant structures is a research topic. Over the lifetime, 1126 publications have been published within this topic receiving 27467 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the efficiency of seismic isolation for seismic retrofitting of bridges with light superstructures and heavy substructures in the state of Illinois is studied, and the cost of retrofitting using SIB is calculated and found to be only 30% of the conventional retrofitting cost.
Abstract: In this paper, the efficiency of seismic isolation for seismic retrofitting of bridges with light superstructures and heavy substructures in the state of Illinois is studied. For this purpose, a representative bridge was selected by Illinois Department of Transpor- tation. A detailed structural model of the bridge capable of simulating the nonlinear behavior of its components and soil-bridge interaction effects was first constructed. Iterative multimode response spectrum analysis ~IMMRSA! of the bridge were conducted to assess its seismic vulnerability. The results from IMMRSA were also verified with nonlinear time history analyses. It was found that the bearings and substructures of the bridge need to be retrofitted. A conventional retrofitting technique was then adopted for the bridge and the cost of retrofit was estimated. Next, the existing bearings were replaced with seismic isolation bearings ~SIB! and the seismic analysis was repeated. It was found that SIB effectively mitigated the seismic forces and eliminated the need for retrofitting of the substructures. The cost of retrofitting using SIB was then calculated and found to be only 30% of the conventional retrofitting cost.

15 citations

Proceedings ArticleDOI
13 Apr 2011
TL;DR: The ASCE 7-10 Minimum Design Loads for Buildings and Other Structures as mentioned in this paper contains several changes regarding wind loads, including the introduction of new wind speed maps to be used with a 1.0 load factor for LRFD and a 0.6 load condition for ASD, the reintroduction of Exposure D for water surfaces in hurricane-prone regions, and revised wind-borne debris regions.
Abstract: ASCE 7-10 Minimum Design Loads for Buildings and Other Structures contains several changes regarding wind loads. The major editorial change is a complete reorganization to a multiple-chapter format as done previously for seismic loads with the objective being to make the provisions easier to follow. Technical changes include the introduction of new wind speed maps to be used with a 1.0 load factor for LRFD and a 0.6 load factor for ASD, the reintroduction of Exposure D for water surfaces in hurricane-prone regions, and revised wind-borne debris regions. A new simplified procedure for buildings up to 160 ft has been added based on the provisions for buildings of all heights.

15 citations

Journal ArticleDOI
TL;DR: In this paper, the mean annual frequency of exceeding a limit state of existing concrete frames by means of the probabilistic approach introduced by the Pacific Earthquake Engineering Research, adopting the application procedure suggested by Jalayer and Cornell and accounting for the uncertainties involved in the seismic response of structures.
Abstract: Recent earthquakes have shown that research in earthquake engineering has to be focused on the assessment of vulnerability of existing constructions lacking appropriate seismic resisting characteristics. In fact, older buildings, designed and constructed until the late 1980s, without considering earthquake provisions, constitute a significant hazard in many cities of southern Europe. Therefore, the retrofit should be made in order to reduce the vulnerability, and, as a consequence, the risk to currently accepted levels. To this scope, the scientific community is developing more accurate methodologies in order to evaluate seismic performances of existing structures. Within this framework, the present paper aims at the evaluation of the mean annual frequency of exceeding a limit state of existing concrete frames by means of the probabilistic approach introduced by the Pacific Earthquake Engineering Research, adopting the application procedure suggested by Jalayer and Cornell and accounting for the uncertainties involved in the seismic response of structures. This procedure properly combines the probabilistic seismic hazard analysis with probabilistic seismic demand analysis and, finally, with the probabilistic seismic capacity analysis. In order to evaluate the seismic reliability of existing structures taking also into account for the model uncertainty, in this paper reference is made to experimental results derived from technical literature. In particular, three full-scale frames (bare frame, frame with brick infilled walls and frame with infilled walls reinforced with shotcrete) tested pseudodynamically at the ELSA Laboratory of Ispra have been considered. The developed analysis allowed to evaluate the seismic reliability of the bare frame, the influence of the infill panels, and, finally, the reliability of the retrofitting solution with shotcrete.

15 citations

Journal ArticleDOI
TL;DR: In this article, the authors compared the performance of template reinforced concrete school buildings with moment-frames or moment-frame and shear walls during strong earthquakes in Turkey and Peru and showed that the disastrous results of "captive columns" are demonstrated in illustrations from what has been observed in recent earthquakes in these seismically active countries.
Abstract: Most of the public school buildings in Turkey and Peru are built according to a small number of template plans. Over the years, these template plans are kept the same while the structural designs are varied with the seismic design codes in force. During recent strong earthquakes in Turkey and Peru, the design concepts and construction styles for these template school buildings have been put to test. In this paper, observed earthquake performances of template reinforced concrete school buildings with moment-frames or moment-frames and shear walls are compared. The comparison reveals choices in design that were successful as well as those that were not. The disastrous results of “captive columns” are demonstrated in illustrations from what has been observed in recent earthquakes in these seismically active countries. It is shown that since 1997 the Peruvian practice has been producing school buildings that perform well during strong earthquakes.

15 citations


Network Information
Related Topics (5)
Buckling
30.3K papers, 465.8K citations
80% related
Plane stress
13.3K papers, 326.2K citations
73% related
Damper
36K papers, 282.6K citations
72% related
Flange
131K papers, 564.9K citations
72% related
Deflection (engineering)
30.8K papers, 298.8K citations
71% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20232
20223
202113
20209
201916
201813