Earthquake-Induced Landslides in the Indian Himalayas and Glimpses of Code Provisions for Seismic Design of Slopes: A Review

2021 ◽  
pp. 271-280
Author(s):  
A. Mugesh ◽  
Koushik Pandit
Keyword(s):  
Seismic Design ◽  
Indian Himalayas ◽  
Code Provisions

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.

Strength Demand Issues Relevant for the Seismic Design of Moment-Resisting Frames

2005 ◽  
Vol 21 (2) ◽  
pp. 415-439 ◽  
Author(s):  
Ricardo A. Medina ◽  
Helmut Krawinkler
Keyword(s):  
Seismic Design ◽  
Brittle Failure ◽  
Failure Modes ◽  
Shear Forces ◽  
Moment Resisting Frames ◽  
Weak Beam ◽  
Moment Resisting ◽  
Nonlinear Static ◽  
Current Code ◽  
Code Provisions

This paper deals with the evaluation of strength demands relevant for the seismic design of columns that are part of moment-resisting frames. Regular frames with fundamental periods from 0.3 sec. to 3.6 sec. and number of stories from 3 to 18 are investigated. An evaluation of the relationships between strength demands (e.g., story shear forces, story overturning moments, and moments in columns), ground motion intensity, fundamental period, and number of stories is the focus of this paper. The results from this study demonstrate that the magnitude and distribution over the height of maximum axial and shear forces in columns exposed to severe earthquakes often are not adequately estimated by current seismic design and analysis procedures (e.g., the nonlinear static pushover). Moreover, the potential of plastic hinging in columns is high for regular frames designed according to the strong-column/weak-beam requirements of current code provisions, and more stringent strong-column/weak-beam criteria appear to be called for. The presented results are intended to provide guidance for improvement of seismic design provisions to avoid brittle failure modes in columns of moment-resisting frames.

The Effect of Seismic Design Methods on Design Eccentricities in Building with Planar Irregularities

2015 ◽  
Vol 764-765 ◽  
pp. 1149-1153
Author(s):  
Kwang Ho Lee ◽  
Seong Hoon Jeong ◽  
Seung Woo Han ◽  
Kang Su Kim
Keyword(s):  
Seismic Design ◽  
Amplification Factor ◽  
The Other ◽  
Lateral Stiffness ◽  
Design Codes ◽  
Dynamic Amplification Factor ◽  
Accidental Eccentricity ◽  
Aspect Ratios ◽  
Dynamic Amplification ◽  
Code Provisions

Seismic provisions have utilized design eccentricities to reduce planar irregularities in lateral stiffness of buildings. In calculating a design eccentricity, the dynamic amplification factor may be applied either to accidental eccentricity or to both inherent and accidental eccentricities according to design codes. In this paper, different code provisions and their impact on torsional responses of buildings are investigated using example buildings with various aspect ratios and eccentricities. It was found that dynamic amplification is underestimated if the inherent eccentricity is small, when buildings are designed by seismic provisions using dynamic amplification factors for both to inherent and accidental eccentricities. On the other hand, the design eccentricity determined by applying the dynamic amplification factor only to accidental eccentricity reflects torsional amplification accurately.

The August 17, 1999, Kocaeli (Turkey) earthquake — damage to structures

2001 ◽  
Vol 28 (4) ◽  
pp. 715-737
Author(s):  
Murat Saatcioglu ◽  
Denis Mitchell ◽  
René Tinawi ◽  
N John Gardner ◽  
Anthony G Gillies ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Precast Concrete ◽  
Steel Structures ◽  
Masonry Structures ◽  
Industrial Facilities ◽  
New Construction ◽  
Design Earthquake ◽  
Code Provisions ◽  
Construction Practice

The 1975 Turkish code provisions are first reviewed to provide the background for design and detailing of structures prior to the earthquake. The performance of reinforced concrete and masonry structures is described indicating many of the deficiencies in design, detailing, and construction execution. The behaviour of precast concrete structures, steel structures, and industrial facilities is also presented. The provisions of the 1997 Turkish building code are summarized and a description of new construction provides evidence of both excellent and poor construction practice. Some examples of retrofitting of damaged structures soon after the earthquake are also presented.Key words: seismic design, earthquake, Kocaeli, structures, codes, concrete, precast concrete.

Review of Earthquake Performance, Seismic Codes, and Dynamic Analysis of Elevators

2000 ◽  
Vol 16 (4) ◽  
pp. 853-878 ◽  
Author(s):  
Luis E. Suarez ◽  
Mahendra P. Singh
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Simple Formula ◽  
Ground Motions ◽  
Building Structures ◽  
Comprehensive Review ◽  
Survey Paper ◽  
Earthquake Performance ◽  
And Performance ◽  
Code Provisions

Elevators are among the most important mechanical systems in building structures that are quite susceptible to earthquake-induced damages. This survey paper is written primarily for the earthquake engineers who have not been directly involved in the design and maintenance of elevator systems but who are professionally interested in their functioning and performance. It describes the important components of an elevator system and highlights those that are most susceptible to earthquake-induced ground motions. A comprehensive review of the observed performance of elevators in past earthquakes reported by many investigators in the open literature is also presented. The evolution of code provisions for seismic design of these systems, measures adopted by the industry to mitigate the seismic effects and enhance seismic performance, and rationale of simple formula used for the current designs of counterweight guide rails and their supports are reviewed. A comprehensive review of the technical studies conducted to examine the dynamic behavior of these studies is also presented.

A Critical Review of the Seismic Design Provisions for Ductile Shear Walls of the Canadian Code and Commentary

1975 ◽  
Vol 2 (4) ◽  
pp. 592-601 ◽  
Author(s):  
T. Paulay ◽  
S. M. Uzumeri
Keyword(s):  
Shear Stress ◽  
Seismic Design ◽  
Seismic Risk ◽  
Plastic Hinge ◽  
Shear Walls ◽  
Shear Wall ◽  
Risk Areas ◽  
The Relationship ◽  
Code Provisions

The 1975 Canadian Building Code for the design of reinforced concrete shear wall buildings in high seismic risk areas includes provisions that are new and significant. This paper critically examines some of these provisions, especially as they apply to cantilever shear walls. Clarifications in the definitions of curvature, member, and system ductilities are attempted. The relationship between curvature and system ductility is examined. Code provisions on allowable shear stress in the wall in the plastic hinge region and the provisions for the classification of the walls are discussed. Attention of the designer is drawn to some aspects of the code and the commentary that may result in structures of doubtful safety.

An overview of Canadian code requirements for earthquake resistant concrete buildings

1978 ◽  
Vol 5 (3) ◽  
pp. 427-441 ◽  
Author(s):  
S. M. Uzumeri ◽  
S. Otani ◽  
M. P. Collins
Keyword(s):  
Seismic Design ◽  
Concrete Buildings ◽  
Earthquake Resistant ◽  
Design Loads ◽  
Code Provisions

After briefly reviewing the need for earthquake resistant construction in Canada, this paper summarizes the development of the Canadian code provisions for seismic design 'loads.' Canadian code provisions for detailing earthquake resistant concrete buildings and the manner in which some of these provisions are applied in practice are then described. A statement of the specific Canadian problems that still need to be solved conclude the paper.

Sign in / Sign up

Export Citation Format

Share Document