Efficacy of Code Provisions for Seismic Design of Asymmetric RC Building

2016 ◽  
Vol 97 (2) ◽  
pp. 111-120
Author(s):  
Bijily Balakrishnan ◽  
Pradip Sarkar
Keyword(s):  
Seismic Design ◽  
Rc Building ◽  
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.

scholarly journals Performance Based Seismic Design of Reinforced Concrete Building by Non-Linear Static Analysis

2021 ◽  
Vol 9 (VII) ◽  
pp. 1748-1752
Author(s):  
Prof. Pallavi K. Pasnur
Keyword(s):  
Seismic Design ◽  
Plastic Hinge ◽  
Time History ◽  
Performance Level ◽  
Economic Losses ◽  
Earthquake Resistant Design ◽  
Non Linear ◽  
Rc Building ◽  
Performance Based Seismic Design ◽  
Design Earthquake

In past two decades earthquake disasters in the world have shown that significant damage occurred even when the buildings were designed as per the conventional earthquake-resistant design philosophy (force-based approach) exposing the inability of the codes to ensure minimum performance of the structures under design earthquake. The performance based seismic design (PBSD), evaluates how the buildings are likely to perform under a design earthquake. As compared to force-based approach, PBSD provides a methodology for assessing the seismic performance of a building, ensuring life safety and minimum economic losses. The non-linear static procedures also known as time history analysis are used to analyze the performance of structure . Plastic hinge formation patterns, plastic rotation, drift ratio and other parameters are selected as performance criterias to define different performance level. In this paper, a five-storey RC building is modelled and designed as per IS 456:2000 and analyzed for lmmediate occupancy performance level in ETABS2015 softwere. Analysis is carried out as per FEMA P58 PART 1 & 2. Plastic hinges as per FEMA273. From the analysis, it is checked that the performance level of the building is as per the assumption

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