Control Spectra for Quito

Abstract. The Metropolitan District of Quito is divided into five areas: south, south-central, central, north-central and north. It is located on or very close to segments of reverse blind faults: Puengasí, Ilumbisí-La Bota, Carcelen-El Inca, Bellavista-Catequilla and Tangahuilla as indicated in Alvarado et al. (2014), making it one of the most seismically dangerous cities in the world. For each of the urban areas of Quito, elastic response spectra are presented in this paper, which are found using some of the new models of the PEER's NGA-West2 Program, models developed by: Abrahamson et al. (2013), Campbell and Borzognia (2013), and Chiou and Youngs (2013). These spectra are calculated considering the maximum amount that could be generated by the rupture of each fault segments, and taking into account the soil type that exists in each zone according to the Norma Ecuatoriana de la Construcción 2015 (NEC-15). Subsequently, the recurrence period of earthquakes of high magnitude in each fault segment is determined from the physical parameters of the fault segments (size of the fault plane and slip rate), and considering that the fault can break in earthquakes of magnitude less than the expected maximum (minimum size 5.0 Mw). For this, the pattern of recurrence of type GR earthquakes (Gutenberg and Richter, 1944) with double truncation magnitude (Mmin and Mmax) proposed by Cosentino et al. (1977) is used.

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Control spectra for Quito

Natural Hazards and Earth System Science ◽

10.5194/nhess-17-397-2017 ◽

2017 ◽

Vol 17 (3) ◽

pp. 397-407 ◽

Cited By ~ 1

Author(s):

Roberto Aguiar ◽

Alicia Rivas-Medina ◽

Pablo Caiza ◽

Diego Quizanga

Keyword(s):

Earthquake Engineering ◽

Urban Areas ◽

Elastic Response ◽

Physical Parameters ◽

Maximum Magnitude ◽

Engineering Research ◽

Fault Segment ◽

South Central ◽

Elastic Response Spectra ◽

The City

Abstract. The Metropolitan District of Quito is located on or very close to segments of reverse blind faults, Puengasí, Ilumbisí–La Bota, Carcelen–El Inca, Bellavista–Catequilla and Tangahuilla, making it one of the most seismically dangerous cities in the world. The city is divided into five areas: south, south-central, central, north-central and north. For each of the urban areas, elastic response spectra are presented in this paper, which are determined by utilizing some of the new models of the Pacific Earthquake Engineering Research Center (PEER) NGA-West2 program. These spectra are calculated considering the maximum magnitude that could be generated by the rupture of each fault segment, and taking into account the soil type that exists at different points of the city according to the Norma Ecuatoriana de la Construcción (2015). Subsequently, the recurrence period of earthquakes of high magnitude in each fault segment is determined from the physical parameters of the fault segments (size of the fault plane and slip rate) and the pattern of recurrence of type Gutenberg–Richter earthquakes with double truncation magnitude (Mmin and Mmax) is used.

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Seismic Analysis of High Pier Three-Span Continuous Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.890 ◽

2015 ◽

Vol 744-746 ◽

pp. 890-893

Author(s):

Xun Wu ◽

Yong Lan Zhang

Keyword(s):

Seismic Analysis ◽

Linear Time ◽

Time History ◽

Response Spectra ◽

Elastic Response ◽

Modeling And Analysis ◽

Continuous Beam Bridge ◽

Comparison Results ◽

Elastic Response Spectra ◽

Nonlinear Time History

In this paper, SAP2000 and ANSYS software are used to modeling and analysis athree-span continuous beam bridge with high piers case study.By using differentbearing types and combinations to form different options, create two finiteelement models.Analysis dynamic characteristics ,elastic response spectra,linear time history and nonlinear time history .And focus on comparing dynamiccharacteristics of the earthquake response of the two programs .Running outputdata processing and comparison results show that the application of thedifferent parameters of the rational combination of rubber bearing basin bridgearrangement has better seismic performance.

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Response Modification Factor for Y-Eccentric-Braced Steel Frame Structures Designed Based on Chinese Code

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.580-583.1449 ◽

2014 ◽

Vol 580-583 ◽

pp. 1449-1457

Author(s):

Wen Xia Yang ◽

Qiang Gu ◽

Ping Zhou Cao ◽

Rong Jin Shi

Keyword(s):

Pushover Analysis ◽

Design Procedure ◽

Response Spectra ◽

Elastic Response ◽

Base Shear ◽

Response Modification Factor ◽

Linear Elastic ◽

Elastic Response Spectra ◽

Modification Factor ◽

Steel Frame Structures

In current seismic design procedure, structure base shear is calculated according to the linear elastic response spectra divided by the response modification factor, which accounts for ductility and overstrength of a structural system. In this paper, the response modification factors of Y-eccentric braced steel frames (YECBF) designed based on Chinese Code were evaluated by an improved pushover analysis on 12 examples with various stories and spans lengths. According to the analysis results, the effects of fundamental periods, storey numbers, and spans of frames on the behavior factor were studied. In the end, an appropriate response modification factor was proposed for YECBF designed base on Chinese Code.

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NGA Ground Motion Model for the Geometric Mean Horizontal Component of PGA, PGV, PGD and 5% Damped Linear Elastic Response Spectra for Periods Ranging from 0.01 to 10 s

Earthquake Spectra ◽

10.1193/1.2857546 ◽

2008 ◽

Vol 24 (1) ◽

pp. 139-171 ◽

Cited By ~ 581

Author(s):

Kenneth W. Campbell ◽

Yousef Bozorgnia

Keyword(s):

Standard Deviation ◽

Ground Motion ◽

Geometric Mean ◽

Response Spectra ◽

Horizontal Component ◽

Elastic Response ◽

Motion Model ◽

Linear Elastic ◽

Ground Motion Model ◽

Elastic Response Spectra

We present a new empirical ground motion model for PGA, PGV, PGD and 5% damped linear elastic response spectra for periods ranging from 0.01–10 s. The model was developed as part of the PEER Next Generation Attenuation (NGA) project. We used a subset of the PEER NGA database for which we excluded recordings and earthquakes that were believed to be inappropriate for estimating free-field ground motions from shallow earthquake mainshocks in active tectonic regimes. We developed relations for both the median and standard deviation of the geometric mean horizontal component of ground motion that we consider to be valid for magnitudes ranging from 4.0 up to 7.5–8.5 (depending on fault mechanism) and distances ranging from 0–200 km. The model explicitly includes the effects of magnitude saturation, magnitude-dependent attenuation, style of faulting, rupture depth, hanging-wall geometry, linear and nonlinear site response, 3-D basin response, and inter-event and intra-event variability. Soil nonlinearity causes the intra-event standard deviation to depend on the amplitude of PGA on reference rock rather than on magnitude, which leads to a decrease in aleatory uncertainty at high levels of ground shaking for sites located on soil.

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Ground motion prediction equations (GMPEs) for elastic response spectra in the Iranian plateau using Gene Expression Programming (GEP)

Journal of Intelligent & Fuzzy Systems ◽

10.3233/ifs-130950 ◽

2014 ◽

Vol 26 (6) ◽

pp. 2825-2839 ◽

Cited By ~ 3

Author(s):

Gholamreza Ghodrati Amiri ◽

Mohamad Shamekhi Amiri ◽

Zahra Tabrizian

Keyword(s):

Gene Expression ◽

Ground Motion ◽

Gene Expression Programming ◽

Response Spectra ◽

Elastic Response ◽

Motion Prediction ◽

Ground Motion Prediction Equations ◽

Ground Motion Prediction ◽

Iranian Plateau ◽

Elastic Response Spectra

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The Damage Potential of Eastern North American Earthquakes

Seismological Research Letters ◽

10.1785/gssrl.64.2.119 ◽

1993 ◽

Vol 64 (2) ◽

pp. 119-137 ◽

Cited By ~ 3

Author(s):

Glenn L. Greig ◽

Gail M. Atkinson

Keyword(s):

North American ◽

High Frequency ◽

High Stress ◽

Response Spectra ◽

Elastic Response ◽

Damage Potential ◽

Elastic Response Spectra ◽

Attenuation Models ◽

Ground Motion Records ◽

Stress Drops

Abstract We compare the damage potential of three recent eastern North American (ENA) earthquakes (Nahanni, 1985; Saguenay, 1988; and Mont Laurier, 1990) to that of the 1989 Loma Prieta, California earthquake. The Saguenay and Mont Laurier events were noteworthy due to their unusually high stress drops. The comparisons are based on synthetic ground motion records generated by the stochastic method, using source and attenuation models that were derived from actual records for each event. Damage potential is characterized by inelastic strength demand spectra, obtained by analyzing the response of nonlinear oscillators to each record. There is a strong similarity between the inelastic spectra and the more familiar elastic response spectra, although some significant differences are observed. Comparisons between events show that a moderate high-stress ENA earthquake, like Saguenay, can be as damaging to high-frequency structures as a major California earthquake.

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Nonlinear energy sink and Eurocode 8: An optimal design approach based on elastic response spectra

Engineering Structures ◽

10.1016/j.engstruct.2020.111020 ◽

2020 ◽

Vol 221 ◽

pp. 111020

Author(s):

Maria Oliva ◽

Giorgio Barone ◽

Francesco Lo Iacono ◽

Giacomo Navarra

Keyword(s):

Optimal Design ◽

Response Spectra ◽

Nonlinear Energy Sink ◽

Design Approach ◽

Elastic Response ◽

Eurocode 8 ◽

Elastic Response Spectra ◽

Energy Sink ◽

Nonlinear Energy

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Seismic Hazard Mapping for Italy in Terms of Broadband Displacement Response Spectra

Earthquake Spectra ◽

10.1193/1.3159004 ◽

2009 ◽

Vol 25 (3) ◽

pp. 515-539 ◽

Cited By ~ 27

Author(s):

Ezio Faccioli ◽

Manuela Villani

Keyword(s):

Seismic Hazard ◽

Response Spectra ◽

Elastic Response ◽

Elastic Displacement ◽

Hazard Mapping ◽

Ground Acceleration ◽

Vibration Period ◽

Displacement Spectra ◽

Elastic Response Spectra ◽

Short Period

A new representation of seismic hazard is proposed for Italy based on displacement elastic response spectra in a vibration period range that extends from [Formula: see text]. This relies on an available seismotectonic zonation and earthquake catalogue, but makes use of a set of very recent, expressly developed attenuation relations. The long period picture of ground motion hazard is illustrated vis-à-vis the conventional one based on ground acceleration, and the feasibility of simple approximations of the displacement spectra, useful for design purposes, is shown. We give some foresight on the differences to be expected in hazard maps resulting from the use of a predominantly fault-based seismic source model, as opposed to the more conventional model that includes only spatially extended zones. Finally, we highlight the different hazard exposure of different regions depending on whether we represent hazard with a long or a short period parameter and we discuss the adequacy of recent code provisions regarding elastic displacement spectra.

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