USGS spectral response maps and their relationship with seismic design forces in building codes

1995 ◽  
Author(s):  
E.V. Leyendecker ◽  
D.M. Perkins ◽  
Sylvester Theodore Algermissen ◽  
P.C. Thenhaus ◽  
S.L. Hanson
Keyword(s):  
Seismic Design ◽  
Spectral Response ◽  
Building Codes

EVALUATION OF THE DYNAMIC CHARACTERISTICS FOR SEISMIC DESIGN OF MULTI-STORY BUILDINGS

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Aya Aboelhamd ◽  
Aman Mwafy ◽  
Suliman Gargoum
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Building Codes ◽  
Fundamental Period ◽  
Braced Frames ◽  
Data Set ◽  
Structural Dynamic ◽  
Moment Resisting Frames ◽  
Moment Resisting ◽  
Period Data

The fundamental period of vibration is a critical structural dynamic characteristic in seismic design. Several expressions for the calculation of the fundamental period have been recommended by different building codes and previous studies. However, further studies are still needed to evaluate the design expressions used for the calculation of the fundamental periods and assess the need for further refinement. In this study, comprehensive fundamental period data from two sources is collected and compared with different formulas from building codes and previous studies. The first data set is obtained from 147 instrumented buildings with various lateral force resisting systems (LFRSs). The second set of period data are collected from the dynamic response simulations of selected structures. Different LFRSs are considered, including steel moment resisting frames (SMRFs), reinforced concrete moment resisting frames (RCMRFs), reinforced concrete shear walls (RCSWs), concentrically braced frames (CBFs), eccentrically braced frames (EBFs), masonry structures and pre-cast structures. The correlations between the derived period expressions with those recommended by the design provisions show that the code approach is conservative enough for SMRFs, CBFs, masonry buildings and pre-cast structures. For RCMRFs, EBFs and RCSWs, the design code is slightly unconservative for low-rise buildings. The outcomes of the study help to arrive at more efficient and cost-effective seismic design of buildings with different characteristics.

scholarly journals Review of the Soft First Story Irregularity Condition of Buildings for Seismic Design

2010 ◽  
Vol 4 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Arturo Tena-Colunga
Keyword(s):  
Seismic Design ◽  
Nonlinear Dynamic ◽  
Substantial Reduction ◽  
Shear Stiffness ◽  
Building Codes ◽  
Lateral Shear ◽  
Dynamic Analyses ◽  
Nonlinear Dynamic Analyses

The present study evaluates how the soft first story irregularity condition should be defined: (a) as a significant reduction of the lateral shear stiffness of all resisting frames within a given story, as established in the seismic provisions of Mexican building codes or, (b) as a substantial reduction of the lateral shear stiffness of one or more resisting frames within a given story, as proposed by the author. Both definitions are evaluated through nonlinear dynamic analyses of buildings systems with a suspected soft first story condition in order to discern which option is closer to define the soft fist story condition.

scholarly journals Seismic Design of Timber Buildings: Highlighted Challenges and Future Trends

2020 ◽  
Vol 10 (4) ◽  
pp. 1380
Author(s):  
Mislav Stepinac ◽  
Iztok Šušteršič ◽  
Igor Gavrić ◽  
Vlatka Rajčić
Keyword(s):  
Seismic Design ◽  
Construction Material ◽  
Wood Products ◽  
Building Codes ◽  
Seismic Retrofitting ◽  
Substantial Contribution ◽  
Sustainable Solutions ◽  
Engineered Wood Products ◽  
Engineered Wood ◽  
Timber Engineering

Use of timber as a construction material has entered a period of renaissance since the development of high-performance engineered wood products, enabling larger and taller buildings to be built. In addition, due to substantial contribution of the building sector to global energy use, greenhouse gas emissions and waste production, sustainable solutions are needed, for which timber has shown a great potential as a sustainable, resilient and renewable building alternative, not only for single family homes but also for mid-rise and high-rise buildings. Both recent technological developments in timber engineering and exponentially increased use of engineered wood products and wood composites reflect in deficiency of current timber codes and standards. This paper presents an overview of some of the current challenges and emerging trends in the field of seismic design of timber buildings. Currently existing building codes and the development of new generation of European building codes are presented. Ongoing studies on a variety topics within seismic timber engineering are presented, including tall timber and hybrid buildings, composites with timber and seismic retrofitting with timber. Crucial challenges, key research needs and opportunities are addressed and critically discussed.

scholarly journals KATEGORI DESAIN SEISMIK WILAYAH KOTA PALEMBANG BERDASARKAN SNI 03-1726-2012 DENGAN MENGGUNAKAN PETA HAZARD GEMPA INDONESIA 2010

2017 ◽  
Vol 4 (1) ◽  
pp. 23
Author(s):  
Sapta Sapta ◽  
Sari Farlianti
Keyword(s):  
Seismic Design ◽  
Spectral Response ◽  
Earthquake Hazard ◽  
Frame Structure ◽  
Risk Level ◽  
Moment Frame ◽  
Short Period ◽  
Using Data ◽  
The Moment ◽  
High Level

Seismic Design category described the Risk level of Seismicity are used as the basis for the selection of the Moment Frame Structure  that will be used in the implementation of the design of structures that use the SNI 03-2847-2013. KDS in SNI 03-1726-2012, classified into three levels respectively, namely; Low (SDC A and B), intermediate (SDC C) and high (SDC D, E and F). Classification of SDC are determined based on the values of the SDS and the SD1 is the spectral response acceleration parameter design on a short period and a period of 1,00 second. The value of the SDS and the SD1 is determined the condition of soil density (soft, medium or hard) on the regions reviewed. From the results of the analysis performed using data on Earthquake Hazard Map 2010 by using application designs spectra and on the website of http://puskim.pu.go.id  obtained the value soil for SDS Badger, medium and hard respectively worth 0.43; 0.278; 0.209 SD1 and 0.361; 0.234; 0.179, so it can be inferred that the Palembang area with a high level of risk, namely KDS D, which in the planning of the structure requires using the structure of Special Moment Frame (SRPMK) which refers to the SNI 03-2847-2013. Key words:  Seismic Design category (SDC), Map of the earthquake area, Moment Frame

Derrick Spectrum Analysis Based on ANSYS

2013 ◽  
Vol 791-793 ◽  
pp. 1529-1532
Author(s):  
Kai Song Wang ◽  
Guo Qing Liu
Keyword(s):  
Structural Dynamics ◽  
Seismic Design ◽  
Spectrum Analysis ◽  
Empirical Formula ◽  
Response Curve ◽  
Optimization Design ◽  
Spectral Response ◽  
Mode Shapes ◽  
Response Analysis ◽  
Important Basis

The existing mine derrick design only includes the guiding principles and the empirical formula, but has no the mechanism of structural dynamics characteristics under an earthquake conditions. Then the modal analysis and spectral response analysis of the derrick have been finished for gaining the derrick natural frequency, mode shapes, and time response curve based on ANSYS in the thesis. The analysis results provides important basis for the anti-seismic design, optimization design and avoiding resonance.

An analytical assessment of elastic and inelastic response spectra

1994 ◽  
Vol 21 (3) ◽  
pp. 386-395 ◽  
Author(s):  
Haluk Sucuoğlu ◽  
Murat Diclelil ◽  
Alphan Nurtuğ
Keyword(s):  
Seismic Design ◽  
Spectral Response ◽  
Seismic Energy ◽  
Response Spectra ◽  
Reduction Factor ◽  
Inelastic Response ◽  
Analytical Assessment ◽  
Damping Reduction Factor ◽  
Earthquake Accelerograms ◽  
Excitation Parameters

A unified assessment of elastic and inelastic response spectra is presented. The effects of various system and excitation parameters on spectral response are investigated. Different spectral forms such as strength spectra, ductility reduction spectra, and damping reduction spectra are employed as graphical tools in the analytical evaluation. The applicability of the expressions for elastic and inelastic response spectra that are employed in seismic design codes is tested by using an ensemble of 21 earthquake accelerograms, all recorded on firm ground along the west coast of North America. New expressions are derived in order to evaluate the coupled effects of damping and ductility ratios on inelastic response spectra. Key words: elastic and inelastic response spectra, damping reduction factor, ductility reduction factor, seismic energy dissipation, strength ratio, mean plus one standard deviation.

Optimum Earthquake Design Coefficients Based on Probabilistic Seismic Hazard Analyses: Theory and Applications

2017 ◽  
Vol 33 (4) ◽  
pp. 1455-1474 ◽  
Author(s):  
Mario Ordaz ◽  
Mario A. Salgado-Gálvez ◽  
Luis E. Pérez-Rocha ◽  
Omar D. Cardona ◽  
Ulises Mena-Hernández
Keyword(s):  
Seismic Hazard ◽  
Optimum Design ◽  
Seismic Design ◽  
Return Period ◽  
Hazard Analysis ◽  
Building Codes ◽  
Probabilistic Seismic Hazard ◽  
Risk Levels ◽  
Earthquake Design ◽  
Design Values

It is common practice to define the seismic design coefficients for earthquake-resistant building codes by choosing a fixed return period, leaving aside considerations about structural vulnerability and acceptable risk levels. This paper reviews the theory of the optimum design, introduced from almost the beginning of the formal probabilistic seismic hazard analysis framework and presents the results of its application in Mexico and Colombia using national seismic hazard models for the two countries. The obtained optimum design coefficients are compared with the ones obtained with the fixed return period approach. Results are presented with the aim of starting to discuss alternative approaches to select, in a more sensible way, the seismic design values included in the building codes.

Development of Maximum Considered Earthquake Ground Motion Maps

2000 ◽  
Vol 16 (1) ◽  
pp. 21-40 ◽  
Author(s):  
Edgar V. Leyendecker ◽  
R. Joe Hunt ◽  
Arthur D. Frankel ◽  
Kenneth S. Rukstales
Keyword(s):  
Ground Motion ◽  
Seismic Design ◽  
Spectral Response ◽  
Design Procedure ◽  
Peak Ground Velocity ◽  
Earthquake Ground Motion ◽  
Ground Acceleration ◽  
Seismic Safety ◽  
Design Procedures ◽  
Seismic Rehabilitation

The 1997 NEHRP Recommended Provisions for Seismic Regulations for New Buildings use a design procedure that is based on spectral response acceleration rather than the traditional peak ground acceleration, peak ground velocity, or zone factors. The spectral response accelerations are obtained from maps prepared following the recommendations of the Building Seismic Safety Council's (BSSC) Seismic Design Procedures Group (SDPG). The SDPG-recommended maps, the Maximum Considered Earthquake (MCE) Ground Motion Maps, are based on the U.S. Geological Survey (USGS) probabilistic hazard maps with additional modifications incorporating deterministic ground motions in selected areas and the application of engineering judgement. The MCE ground motion maps included with the 1997 NEHRP Provisions also serve as the basis for the ground motion maps used in the seismic design portions of the 2000 International Building Code and the 2000 International Residential Code. Additionally the design maps prepared for the 1997 NEHRP Provisions, combined with selected USGS probabilistic maps, are used with the 1997 NEHRP Guidelines for the Seismic Rehabilitation of Buildings.

scholarly journals United States building code approach to variations in regional seismicity

2000 ◽  
Vol 33 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Charles A. Kircher
Keyword(s):  
United States ◽  
Seismic Design ◽  
Model Building ◽  
Building Design ◽  
The United States ◽  
Building Codes ◽  
Building Code ◽  
Design Criteria ◽  
Narrow Strip ◽  
Moderate Seismicity

The United States contains regions of greatly varying seismicity ranging from a relatively narrow strip of very high seismicity along coastal California in the West to broad areas of low or moderate seismicity typical of the Central and Eastern United States. The United States currently has three major regional model building codes. While all three codes have traditionally used the concept of seismic zones to identify and distinguish between regions of different seismicity, they have not had a consistent basis for their seismic criteria. Beginning in the year 2000, the three model building codes will merge and become the new International Building Code (IBC) applicable to the whole United States. New seismic design criteria have been developed for the 2000 IBC that now define ground shaking for building design by spectral acceleration contours. This paper describes the background and basis for the new seismic design criteria of the 2000 IBC, and how these criteria address the large variation in seismic hazard across the United States.

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