A Ground Motion Scaling Method considering Higher-Mode Effects and Structural Characteristics

Weng, Yuan‐Tao; Tsai, Keh‐Chyuan; Chan, Ya-Ran

doi:10.1193/1.3460374

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…However, these IMs do not account for higher vibration modes of the structure and non-linear effects, such as elongation of natural period [5,[13][14][15][16][17]. To address this concern, several contemporary IMs have been proposed to accommodate the characteristics of both the ground motion and the structure [7,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Ground Motion Intensity Measuresmentioning

confidence: 99%

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Analysis of Ground Motion Intensity Measures and Selection Techniques for Estimating Building Response

2022

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The structural response of buildings to earthquake shaking is of critical importance for seismic design purposes. Research on the relationship between earthquake ground motion intensity, building response, and seismic risk is ongoing, but not yet fully conclusive. Often, probability demand models rely on one ground motion intensity measure (IM) to predict the engineering demand parameter (EDP). The engineering community has suggested several IMs to account for different ground motion characteristics, but there is no single optimal IM. For this study, we compile a comprehensive list of IMs and their characteristics to assist engineers in making an informed decision. We discuss the ground motion selection process used for dynamic analysis of structural systems. For illustration, we compute building responses of 2D frames with different natural period subjected to more than 3500 recorded earthquake ground motions. Using our analysis, we examine the effects of different structural characteristics and seismological parameters on EDP-IM relationships by applying multi-regression models and statistical inter-model comparisons. As such, our results support and augment previous studies and suggest further improvements on the relationship between EDP and IM in terms of efficiency and sufficiency. Finally, we provide guidance on future approaches to the selection of both optimal intensity measures and ground motions using newer techniques.

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Section: Ground Motion Intensity Measuresmentioning

confidence: 99%

“…Housner [46] defined actual damage to structures as the difference between relative input energy and damping energy. Equations (18) and (19) are equivalent velocities that represent the relative input energy and damage energy, respectively.…”

Section: Energy Imsmentioning

confidence: 99%

Analysis of Ground Motion Intensity Measures and Selection Techniques for Estimating Building Response

2022

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“…Twenty Los Angeles 10% in 50-year seismic hazard level ground motions developed for the SAC joint research project (Gupta and Krawinkler 1999) were used in this study. The earthquake ground accelerations were all scaled (Weng et al 2010) to the Sa = 1.07 g in the DBE response spectrum at the fundamental period of T = 0.429 s as shown in Figure 7b. The OpenSees nonlinear dynamic analysis results showed that the LA03 acceleration record scaled to the PGA = 597 cm/s 2 are within the limit of the NCREE laboratory's facility.…”

Section: Hybrid Tests and Analytical Studies Of The Three-story Scbf Specimenmentioning

confidence: 99%

Seismic Design and Hybrid Tests of a Full-Scale Three-Story Concentrically Braced Frame using In-Plane Buckling Braces

Tsai

Lin

et al. 2013

Earthquake Spectra

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This research investigates the brace-to-gusset connection designs to allow the braces buckle in the plane (IP) of the frame. In order to study the performance of the IP buckling brace connections with different design details, five 3,026 mmlong A36 H 175 Â 175 Â 7.5 Â 11 mm braces were tested using cyclically increasing axial displacements. All specimens failed at an average axial strain less than 0.025 due to the brace fracture at the mid-length where severe local buckling had occurred. Pseudo-dynamic tests on a three-story special concentrically braced frame (SCBF) using the proposed brace end connection details for six A36 H 150 Â 150 Â 7 Â 10 mm braces were conducted using the PGA ¼ 597 cm=s 2 LA03 record to confirm with the component tests. The knife plates and IP buckling braces sustained a peak 0.049 rad interstory drift under the design base earthquake without fracture. The highly nonlinear responses were satisfactorily predicted by OpenSees. Recommendations on the seismic design of the IP buckling brace connections are provided.

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“…Wang concluded that GMs selected based on this procedure exhibited better efficiency and sufficiency in capturing the seismic responses. Weng et al 22 proposed a GM selection and scaling method incorporating the dominant modes of vibration. Bradley et al 23 evaluated various methods of GM simulations as alternatives to empirical Ground Motion Prediction Equations (GMPEs) to generate a set of hazard‐consistent synthetic records.…”

Section: Introductionmentioning

confidence: 99%

Effects of conditioning criteria for ground motion selection on the probabilistic seismic responses of reinforced concrete buildings

Ghotbi

Taciroğlu

2020

Earthq Engng Struct Dyn

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Ground motion selection is arguably the most crucial step in performance‐based seismic design and risk assessment, as it bears the highest level of uncertainty that needs to be propagated through the calculations. The presently typical approach to capture this uncertainty in predicted structural responses is to use a suite of ground motions that match a uniform‐hazard response spectrum. This study examines the downstream effects of ground motion selection made through a variety of conditioning criteria based on one, two, or average of more‐than‐two intensity measures, and also with respect to different earthquake characteristics. Ductile and nonductile reinforced concrete moment frames with varying heights are used as model problems in detailed parametric studies. A risk‐based approach is adopted to develop a point‐of‐comparison reference demand. Seismic responses obtained using different ground motion suites compiled using three different conditioning criteria are then compared against this reference to determine the extent to which the selected ground motion suites can capture various critical structural responses.

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A Ground Motion Scaling Method considering Higher-Mode Effects and Structural Characteristics

Cited by 14 publications

References 19 publications

Analysis of Ground Motion Intensity Measures and Selection Techniques for Estimating Building Response

Analysis of Ground Motion Intensity Measures and Selection Techniques for Estimating Building Response

Seismic Design and Hybrid Tests of a Full-Scale Three-Story Concentrically Braced Frame using In-Plane Buckling Braces

Effects of conditioning criteria for ground motion selection on the probabilistic seismic responses of reinforced concrete buildings

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