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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.


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Journal ArticleDOI
TL;DR: In this article, the authors provide an overview of the major trends that have characterized those changes in seismic design provisions in building codes of the United States and discuss the implications for precacst concrete.
Abstract: Seismic design provisions in building codes of the United States have undergone profound and far reaching changes in recent years. This paper provides an overview of the major trends that have characterized those changes. Trends in the broad areas of seismic input, site classification and site coefficients, triggers for seismic detailing requirements, and performance basis of seismic design are examined. Implications for precacst concrete are briefly discussed and future trends are briefly commented upon.

4 citations

DOI
01 Jan 1983
TL;DR: In this article, the authors suggest the use of curved plates and bars of hot rolled mild steel as energy dissipating devices for the design of earthquake-resistant structures, which can be used in parallel with isolating systems in buildings or other structures.
Abstract: This thesis suggests the use of curved plates and bars of hot rolled mild steel as energy dissipating devices for the design of earthquake-resistant structures. The proposed devices would be used in parallel with isolating systems in buildings or other structures. They are designed to deflect ela s t i c a l l y under minor loads such as wind and to deform plastically when subjected to major earthquake loadings. The devices have a large energy absorbing capacity at a high number of cycles; they are economical and, once installed, can be easily inspected and replaced. An engineering method i s presented for predicting the number of cycles to failure of the devices. The practical application and f e a s i b i l i t y of a base-isolated steel structure with discrete yield rings is demonstrated in a model test on a shaking table. A design method for the yield rings i s proposed.

4 citations

Proceedings ArticleDOI
15 May 2009
TL;DR: Wang et al. as discussed by the authors constructed a predictive model on the basis of artificial neural network (ANN), which made the distribution of the maximum of earthquake affecting coefficient become a spatial variable. But the model is not suitable for large scale applications.
Abstract: Eearthquake affecting coefficient is a main parameter of earthquake response spectra, which is the foundation of seismic microzonation and design of earthquake resistant structures. Because the distribution of the maximum of earthquake affecting coefficient is controlled by both basement rock and site condition, the relationship between the maximum of earthquake affecting coefficient and influencing factors is complicated. In order to design earthquake response spectra subtly, the predictive model is constructed on the basis of artificial neural network (ANN), which makes the distribution of the maximum of earthquake affecting coefficient become a spatial variable. As an example application in Tangshan City, the distribution of the maximum of earthquake affecting coefficient is calculated precisely. The calculating results are analyzed and some advice is proposed.

4 citations

01 Aug 1976
TL;DR: In this article, the authors describe an effort which was undertaken to develop a set of practical retrofit measures that can be employed on existing bridges so as to reduce damage and minimize the threat to life should an earthquake occur.
Abstract: The San Fernando earthquake of February 9, 1971 has demonstrated that bridges located in high risk seismic zones and which were designed in accordance to the then prevailing AASHO design criteria may not possess adequate seismic resistance. This narrative describes an effort which was undertaken to develop a set of practical retrofit measures that can be employed on existing bridges so as to reduce damage and minimize the threat to life should an earthquake occur. The process leading to the identification of potential bridge weaknesses, selection of retrofit measure and verification of its adequacy is illustrated using two analysis procedures, i. e. , a detailed analysis method and a simplified one.

4 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented Structural Seismic Isolation Method (SSIM) to provide high safety for Highly Reliable Structures (HRS) against strong earthquakes including near-fault and long-period ground motions.
Abstract: Presented Structural Seismic Isolation Method (SSIM) aims to provide high safety for Highly Reliable Structures (HRS) against strong earthquakes including near-fault and long-period ground motions. The examined structure is converted to Structural Seismic Isolation System (SSIS) by the SSIM method which exhibited inverse pendulum behaviour. For this purpose, structure foot base and foundation contact surfaces have been designed as any curved surfaces (spherical, elliptical, etc.) depending on the earthquake-soil-superstructure parameters and this contact surfaces have been separated by elastomeric (lead core rubber or laminated rubber bearings) seismic isolation devices. It would allow the structure foot base to turn around gyration centre through rubber bearing contact and maintains similar behaviour to the super-structure. SSIS system provides the possibility of keeping the natural-period of the structure in a larger interval, which is greater than the predominant-period of the majority of possible earthquakes (including near-fault pulse) using currently existing conventional elastomeric isolators with up to 4 second period. Thus, the structure can sustain its serviceability after strong and long-period earthquakes. In this study SSIS system’s performance is presented for high-rise building structures, for this aim, the finite element model of the building (Bg) structure with SSIS system (SSIS-Bg) has been prepared and the nonlinear dynamic analysis of the model has been conducted using strong and long-period ground motions. Results indicate that the base and top accelerations, base shear and base moment responses of the SSIS-Bg structure is 23.21 %, 75.47 % and 85.74 % in average lower than the Conventional Application Method of Seismic Base Isolation Devices for Building (CAMSBID-Bg) structures respectively and it is not prone to resonant vibrations under long-period earthquakes related with the excessive deformation in the isolation layers in case of using CAMSBID-Bg structures. It should be noted that in this study with the presented SSIM method and SSIS system, it is aimed to protect only the Highly Reliable Structures(HRS) from the effects of strong and long-period ground motions and these structures (HRS) are classified as follows: 1) Nuclear Containment Structures; 2) High-rise buildings that contain information, operating systems, sensitive instruments, communication systems, routing systems, bank operating systems, databases, management systems and other similar facilities that are linked to the security and economy of a country; 3) High-rise hospitals etc.

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20232
20223
202113
20209
201916
201813