Application of inelastic response spectra derived from seismic hazard spectral ordinates for Canada

1996 ◽  
Vol 23 (5) ◽  
pp. 1051-1063 ◽  
Author(s):  
J. L. Humar ◽  
M. A. Rahgozar
Keyword(s):  
Seismic Hazard ◽  
Response Spectra ◽  
Reduction Factor ◽  
Reliable Estimate ◽  
Spectral Acceleration ◽  
Hazard Maps ◽  
Uniform Hazard Spectra ◽  
Spectral Curves ◽  
Modification Factor ◽  
Recorded Data

The Geological Survey of Canada is currently producing a suite of new hazard maps for Canada. These maps take into account the additional recorded data obtained during the past 13 years, as well as the new geological and tectonic information that has recently become available. They provide elastic spectral acceleration values for a uniform probability of exceedance of 10% in 50 years. A method of using the uniform hazard spectral values to obtain design response spectral curves for different values of ductility is presented here. The method uses two spectral values obtained from the hazard maps, the peak spectral acceleration for the site and the spectral acceleration corresponding to a period of 0.5 s. Empirical expressions are developed to represent the design response spectra. It is shown that by using inelastic spectral accelerations rather than the elastic spectral values in association with a reduction factor, the new method provides a more reliable estimate of the design forces. Key words: uniform hazard spectra; inelastic spectra, seismic design forces, force modification factor, foundation factor, seismic hazard for Canada.

scholarly journals Seismic hazard of the Iberian Peninsula: evaluation with kernel functions

2014 ◽  
Vol 14 (5) ◽  
pp. 1309-1323 ◽  
Author(s):  
M. J. Crespo ◽  
F. Martínez ◽  
J. Martí
Keyword(s):  
Seismic Hazard ◽  
Iberian Peninsula ◽  
Spatial Dependence ◽  
Kernel Functions ◽  
Return Periods ◽  
Hazard Maps ◽  
Uniform Hazard Spectra ◽  
Activity Rate ◽  
Attenuation Relationships ◽  
Deep Sources

Abstract. The seismic hazard of the Iberian Peninsula is analysed using a nonparametric methodology based on statistical kernel functions; the activity rate is derived from the catalogue data, both its spatial dependence (without a seismogenic zonation) and its magnitude dependence (without using Gutenberg–Richter's relationship). The catalogue is that of the Instituto Geográfico Nacional, supplemented with other catalogues around the periphery; the quantification of events has been homogenised and spatially or temporally interrelated events have been suppressed to assume a Poisson process. The activity rate is determined by the kernel function, the bandwidth and the effective periods. The resulting rate is compared with that produced using Gutenberg–Richter statistics and a zoned approach. Three attenuation relationships have been employed, one for deep sources and two for shallower events, depending on whether their magnitude was above or below 5. The results are presented as seismic hazard maps for different spectral frequencies and for return periods of 475 and 2475 yr, which allows constructing uniform hazard spectra.

Seismic hazard analysis: a comparative study

2006 ◽  
Vol 33 (9) ◽  
pp. 1156-1171 ◽  
Author(s):  
H P Hong ◽  
K Goda ◽  
A G Davenport
Keyword(s):  
Seismic Hazard ◽  
Seismic Hazard Assessment ◽  
Historical Seismicity ◽  
Hazard Maps ◽  
Uniform Hazard Spectra ◽  
Attenuation Relations ◽  
Seismic Hazard Maps ◽  
Cell Method ◽  
Thiessen Polygon ◽  
The Impact

The quantitative seismic hazard maps for the 1970s National Building Code of Canada were evaluated using the Davenport–Milne method. The Cornell–McGuire method is employed to develop recent seismic hazard maps of Canada. These methods incorporate the information on seismicity, magnitude-recurrence relations, and ground motion (or response) attenuation relations. The former preserves and depends completely on details of the historical seismicity; the latter smoothes the irregular spatial occurrence pattern of the historical seismicity into seismic source zones. Further, the Epicentral Cell method, which attempts to incorporate the preserving and smoothing aspect of these methods, has been developed. However, the impact of the adopted assumptions on the estimated quantitative seismic hazard has not been investigated. This study provides a comparative seismic hazard assessment using the above-mentioned methods and simulation-based algorithms. The analysis results show that overall the Davenport–Milne method gives quasi-circular seismic hazard contours near significant historical events, and the Cornell–McGuire method smoothes the transition of contours. The Epicentral Cell method provides estimates approximately within the former and the latter. Key words: epicentral cell method, probability, seismic hazard, Thiessen polygon, Voronoi, uniform hazard spectra.

scholarly journals Development of seismic hazard maps for the proposed 2005 edition of the National Building Code of Canada

2003 ◽  
Vol 30 (2) ◽  
pp. 255-271 ◽  
Author(s):  
John Adams ◽  
Gail Atkinson
Keyword(s):  
Seismic Hazard ◽  
Earthquake Engineering ◽  
Ground Motions ◽  
Building Code ◽  
National Committee ◽  
Hazard Maps ◽  
Uniform Hazard Spectra ◽  
Earthquake Probability ◽  
Seismic Hazard Maps ◽  
Strong Ground

A new seismic hazard model, the fourth national model for Canada, has been devised by the Geological Survey of Canada to update Canada's current (1985) seismic hazard maps. The model incorporates new knowledge from recent earthquakes (both Canadian and foreign), new strong ground motion relations to describe how shaking varies with magnitude and distance, the newly recognized hazard from Cascadia subduction earthquakes, and a more systematic approach to reference site conditions. Other new innovations are hazard computation at the 2% in 50 year probability level, the use of the median ground motions, the presentation of results as uniform hazard spectra, and the explicit incorporation of uncertainty via a logic-tree approach. These new results provide a more reliable basis for characterizing seismic hazard across Canada and have been approved by the Canadian National Committee on Earthquake Engineering (CANCEE) as the basis of the seismic loads in the proposed 2005 edition of the National Building Code of Canada.Key words: seismic hazard, earthquake, probability, uniform hazard spectrum, maps, Cascadia subduction, strong ground motions, uncertainty, CANCEE, National Building Code of Canada.

Seismic Hazard Mapping of California considering Site Effects

2010 ◽  
Vol 26 (4) ◽  
pp. 1039-1055 ◽  
Author(s):  
Erol Kalkan ◽  
Chris J. Wills ◽  
David M. Branum
Keyword(s):  
Seismic Hazard ◽  
Site Effects ◽  
Hazard Mapping ◽  
Spectral Acceleration ◽  
Hazard Map ◽  
Hazard Maps ◽  
Seismic Hazard Maps ◽  
Geologic Map ◽  
Seismic Hazard Map ◽  
The U.S

In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire state for each VS30 value. By merging seismic hazard maps based on the seven different VS30 values, a suite of seismic hazard maps was computed for 0.2 and 1.0 s spectral ordinates at 2% probability of exceedance (PE) in 50 years. The improved hazards maps explicitly incorporate the site effects and their spatial variability on ground motion estimates. The spectral acceleration (SA) at 1.0 s map of seismic shaking potential for California has now been published as California Geological Survey Map Sheet 48.

scholarly journals Seismic hazards of the Iberian Peninsula – evaluation with kernel functions

2013 ◽  
Vol 1 (4) ◽  
pp. 3763-3811 ◽  
Author(s):  
M. J. Crespo ◽  
F. Martínez ◽  
J. Martí
Keyword(s):  
Seismic Hazard ◽  
Iberian Peninsula ◽  
Spatial Dependence ◽  
Kernel Functions ◽  
Return Periods ◽  
Hazard Maps ◽  
Uniform Hazard Spectra ◽  
Activity Rate ◽  
Deep Sources ◽  
Attenuation Laws

Abstract. The seismic hazard of the Iberian Peninsula is analysed using a nonparametric methodology based on statistical kernel functions; the activity rate is derived from the catalogue data, both its spatial dependence (without a seismogenetic zonation) and its magnitude dependence (without using Gutenberg–Richter's law). The catalogue is that of the Instituto Geográfico Nacional, supplemented with other catalogues around the periphery; the quantification of events has been homogenised and spatially or temporally interrelated events have been suppressed to assume a Poisson process. The activity rate is determined by the kernel function, the bandwidth and the effective periods. The resulting rate is compared with that produced using Gutenberg–Richter statistics and a zoned approach. Three attenuation laws have been employed, one for deep sources and two for shallower events, depending on whether their magnitude was above or below 5. The results are presented as seismic hazard maps for different spectral frequencies and for return periods of 475 and 2475 yr, which allows constructing uniform hazard spectra.

scholarly journals Design Response Spectra Based on Earthquake Hazard Maps and Specific Soil Properties at Indonesian Ports According to SNI 1726 2019

2021 ◽  
Vol 17 (1) ◽  
pp. 41-54
Author(s):  
Christino Boyke Surya Permana
Keyword(s):  
Site Response ◽  
Response Spectrum ◽  
Earthquake Hazard ◽  
Response Spectra ◽  
Site Response Analysis ◽  
Response Analysis ◽  
Spectral Acceleration ◽  
Hazard Maps ◽  
The Difference ◽  
S Period

Indonesia has a new seismic code, namely SNI 1726 2019 (SNI 2019). It is developed based on the 2017 Indonesian Earthquake Source, Hazard Maps, and ASCE 7-16. This paper is intended to explain the procedure for calculating response spectrum according to SNI 1726 2019, at ten ports located in Indonesia. The results are then verified with the software RSA2019.  Furthermore, it will be compared to SNI 1726 2012 (SNI 2012) to see the difference in spectral acceleration value (Sa). The result presents that the ports located in Sorong and Banggai have the highest Sa, whereas the port in Banjarmasin has the smallest value. Port in Surabaya and Tuban have nearly the same Sa due to their close location, while Banyuwangi has a Sa value slightly above them. The ports in Padang, Lampung, and Penajam must use a specific site response analysis to determine the design response spectra, which is not discussed in this paper. The comparison with SNI 2012 shows that the response spectra of SNI 2019 have a higher Sa than SNI 2012. However, in some areas such as Tuban and Sorong, the Sa of SNI 2012 at 0.1 to 0.6 s period are larger than SNI 2019.  

scholarly journals Construction of a Site- and Period-Specific Seismic Hazard Map for the Korean Peninsula

2020 ◽  
Vol 20 (2) ◽  
pp. 207-220
Author(s):  
Hyun Woo Jee ◽  
Sang Whan Han
Keyword(s):  
Seismic Hazard ◽  
Seismic Design ◽  
Korean Peninsula ◽  
Response Spectrum ◽  
Response Spectra ◽  
Earthquake Damage ◽  
Economic Damage ◽  
Hazard Maps ◽  
Ground Acceleration ◽  
Seismic Hazard Maps

The 2016 Gyeongju and 2017 Pohang earthquakes caused casualties and economic damage in the surrounding areas. Therefore, the importance of earthquake damage prediction and seismic design in the Korean peninsula has increased. Probabilistic seismic hazard analysis (PSHA) is one of the well-known methods for predicting earthquake damage. The objective of this study is to construct Korean Peninsula seismic hazard maps of 5% damped response spectrum acceleration and peak ground acceleration, using PSHA. To consider the local effects for each site's classification, seismic hazard maps were constructed by considering the site amplification model. To conduct seismic design, uniform hazard response spectra (UHRS) were also constructed for the Korean peninsula.

scholarly journals Seismic hazard in Australia and New Zealand

1995 ◽  
Vol 28 (4) ◽  
pp. 279-287 ◽  
Author(s):  
D. J. Dowrick ◽  
G. Gibson ◽  
K. McCue
Keyword(s):  
New Zealand ◽  
Seismic Hazard ◽  
Return Period ◽  
Peak Ground Acceleration ◽  
Regional Differences ◽  
Response Spectra ◽  
Building Codes ◽  
Hazard Maps ◽  
Ground Acceleration ◽  
Different Response

As a prelude to the planned harmonization of building codes in Australia and New Zealand, this paper illustrates the seismic hazard in the two countries for discussion purposes. Hazard maps for peak ground acceleration for a 475 year return period are presented, and also for 2500 year return period in New Zealand, along with typical response spectra. It is shown that the hazard in the least seismic parts of New Zealand is similar to that of the more seismically active parts of Australia. The eventual harmonized loadings code would accommodate regional differences in hazard by using different response spectra and zone factors appropriate to the different regions of the two countries.

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