Assessment of ground motion selection criteria specified in current seismic provisions with an accurate selection algorithm

Han, Sang Whan; Ha, Seong Jin

doi:10.1007/s10518-017-0149-z

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…In the past two decades, plenty of research efforts have been made in developing spectra-matching-based IGM selection procedures for selecting and scaling proper IGMs for the NLRHA of building structures [17][18][19][20][21][22][23][24][25][26][27][28]. However, the structural seismic demand is affected by the peak modal responses and the modal response combinations in the time domain, which is determined by the frequency contents combinations in the frequency domain (FCCFD) and time-domain (FCCTD) of IGMs, respectively [29].…”

Section: Introductionmentioning

confidence: 99%

Modal-Based Ground Motion Selection Method for the Nonlinear Response Time History Analysis of Reinforced Concrete Shear Wall Structures

Liu

2021

Applied Sciences

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This paper presents a modification of the modal-based ground motion selection (MGMS) method for improving the reliability of the nonlinear response time history analysis (NLRHA) of reinforced concrete (RC) shear wall structures. The original MGMS procedure quantified the impact of frequency content combinations in the time domain (FCCTD) of input ground motions (IGMs) on the seismic response of building structures using the level of interaction of the first three modes induced by IGMs. However, previous research found that the first two modes have far larger modal mass coefficients than those of higher modes and dominate the vibration of the RC shear wall structures with a symmetric plan. Therefore, the MGMS procedure should be modified by employing the interaction of the first two modes induced by IGMs to properly account for the effect of the FCCTD of IGMs on the seismic response of structures. In the MGMS procedure for RC shear wall structures, seven IGMs that caused the most significant interactions of the first two modes were selected from a suite of twenty seed IGMs, which were chosen with a conventional spectra-matching-based IGMs selection procedure for the NLRHA of the structure. A comprehensive case study involving three RC shear walls with different heights was conducted to investigate the capability of the MGMS in selecting suitable IGMs for the NLRHA of RC shear wall structures. Sets of seed IGMs were selected, adopting conditional mean spectra and design spectra as the target spectra. It was found that the seismic demands computed using MGMS selected IGMs can ensure a more reliable and reasonable computation of seismic demands compared with conventional spectra-matching-based IGMs selection methods.

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Section: Introductionmentioning

confidence: 99%

Modal-Based Ground Motion Selection Method for the Nonlinear Response Time History Analysis of Reinforced Concrete Shear Wall Structures

Liu

2021

Applied Sciences

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“…The most common method for selecting records is code-based method. Despite the simplicity and practicality of this method, it has considerable drawbacks [1,2]. There are different efforts to improve this method and increase its accuracy in estimating the seismic performance of structures.…”

Section: Introductionmentioning

confidence: 99%

A New Ground Motion Record Selection Procedure Based on the Effects of Spectral Shape and Period Elongation

2019

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One of the most prevalent ground motion Intensity Measures (IMs) is the spectral acceleration at the fundamental period of the structure. Previous research has shown that vectorizing scalar IMs leads to a more reliable structural response, particularly in the nonlinear region and near collapse. Furthermore, nonlinear behavior of ductile structures results in an elongation in the "effective period" of the structure. Therefore, this paper proposes a new approach for selecting ground motion records considering the effect of spectral shape and period elongation. This method contains two disaggregation analyses at the fundamental and elongated period of the structure. Nonlinear dynamic analysis is conducted on a set of reinforced concrete moment resisting frames designed based on ACI 318-05 as representatives of modern structures. Results show a considerable decrease in the median collapse prediction, margin against collapse and dispersion of the structural response. The presented approach can give a better prediction for the vulnerability of the structure toward collapse.

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Modal-based ground motion selection procedure for nonlinear response time history analysis of dual wall-frame structures

Liu

Huang

Liu

et al. 2021

Bull Earthquake Eng

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Assessment of ground motion selection criteria specified in current seismic provisions with an accurate selection algorithm

Cited by 6 publications

References 13 publications

Modal-Based Ground Motion Selection Method for the Nonlinear Response Time History Analysis of Reinforced Concrete Shear Wall Structures

Modal-Based Ground Motion Selection Method for the Nonlinear Response Time History Analysis of Reinforced Concrete Shear Wall Structures

A New Ground Motion Record Selection Procedure Based on the Effects of Spectral Shape and Period Elongation

Modal-based ground motion selection procedure for nonlinear response time history analysis of dual wall-frame structures

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