Effects of Ground Motion Duration on the Seismic Performance of a Two-Storey Balloon-Type CLT Building

Jafari, Maral; Pan, Yuxin; Shahnewaz, Md; Tannert, Thomas

doi:10.3390/buildings12071022

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…In this way, insights can be obtained into the relative impact of ground motion duration. Many researchers have utilized this approach to gauge duration effects using single degree of freedom (SDOF) modeling [4][5][6][7] on the seismic performance of different structural systems, including bridges [8], reinforced concrete structures [9][10][11], and light-frame wood constructions [12][13][14][15]. In terms of steel moment frames, the focus of the current study, Liapopoulou et al [7], Chandramohan et al [16], and Hwang et al [17] found that long-duration ground motions resulted in a relatively 20%, 29%, and 43% reduction in median collapse capacity (i.e., median spectral acceleration of collapse at the fundamental period of buildings), respectively.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Ground Motion Duration on Losses in Typical Modern Steel Moment Frames

Safiey,

Majdalaweyh,

Pang

2024

Buildings

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This research was undertaken to study the duration effects on the seismic economic risk of steel moment frame (SMF) buildings, a prominent class of buildings in commercial stock. Firstly, a modified version of FEMA P-695 ground motion scaling, tailored for seismic loss estimation purposes and incorporating two sets of spectrally matched bi-directional short- and long-duration ground motions, is proposed to study code-compliant plan-symmetrical SMFs with different heights (i.e., two to 20 stories). It is shown that long-duration ground motions increase the collapse risk of SMFs, on average, by 28.0% at the MCE level. Next, a component-based loss estimation methodology was adopted for evaluating the seismic losses under each set of ground motions. These losses are studied separately for building components (i.e., structural and nonstructural) and contents. Moreover, we propose an approach for calculating average annualized loss (AAL) as a prominent risk meter that segregates contributions of short- and long-duration ground motions to attain hazard consistency. Loss analyses showed the minimal impact of building height on the contribution of these two types of earthquakes. The seismic risk analysis of buildings also revealed that collapse risk is influenced mainly by duration effects followed by building and content losses.

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Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Ground Motion Duration on Losses in Typical Modern Steel Moment Frames

Safiey,

Majdalaweyh,

Pang

2024

Buildings

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“…In the performance-based design process, the structural safety assessment targets should be quantified according to the damage index [1][2][3]. A reasonable damage index not only reflects the damage caused by the three elements of the earthquake (amplitude, frequency spectrum, and earthquake duration) [4][5][6][7], but also establishes a corresponding relationship with the construction member parameters to improve the mechanical properties of the structure [8]. The existing damage index can be classified into three aspects: (a) degradation-based damage index; (b) deformation-based damage index; and (c) energy-based damage index.…”

Section: Introductionmentioning

confidence: 99%

Research on Damage Mechanism and Performance-Based Design Process of Reinforced Concrete Column Members

et al. 2023

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In order to understand the seismic damage assessment of reinforced concrete column members, the coupling relationship between the capacity degradation and the accumulated hysteretic energy and the displacement history was considered. The energy-based damage index under the random variable amplitude loading history was proposed. On the basis of preliminary research, the corresponding relationship between the damage index and the construction member parameters and seismic parameters was established, the damage mechanism was analyzed according to the damage index, and then the performance-based design process was proposed. It was found that increase in the stirrup ratio can slow down the damage, and the slowing effect was initially fast and then slows. When the reinforcement ratio is doubled, the damage index decreased by 0.063. The longer the earthquake duration was, the more serious the damage was, and this phenomenon was more obvious when the ductility coefficient was larger. With the increase in the ductility coefficient, the damage continuously increased. Therefore, it is an effective way to decrease the damage by controlling the ductility coefficient. Among all the influencing factors, the fundamental period and seismic intensity contributed more significantly to the damage indicators. When the damage index (performance objective) was determined, the target stirrup ratio can be obtained according to the proposed performance design process, that is, this design process can be used in the performance-based design. The design method based on damage index can make up for the deficiency that the design method based on the ductility coefficient does not consider the earthquake duration.

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“…Ground motion duration is a key parameter that considerably influences the seismic response of various types of structures [13][14][15][16][17][18][19][20][21]. In addition, ground motion duration is a key parameter for simulating ground motion recordings (used for nonlinear time history analyses of structures in areas with few available recordings) for various tectonic regimes and source-site distances.…”

Section: Introductionmentioning

confidence: 99%

Ground Motion Duration Patterns for Vrancea (Romania) Intermediate-Depth Earthquakes

Pavel,

Nica

2023

Geosciences

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This study is focused on evaluating ground motion durations of Vrancea intermediate-depth earthquakes in Romania, in the context of future updates to the Romanian seismic design code P100-1/2013. The ground motion database compiled for this study consists of about 200 ground motions recorded during five moderate and large Vrancea intermediate-depth earthquakes that occurred in the period of 1977–2004 and had moment magnitudes of MW ≥ 6.0. Two empirical models were derived in this study for the significant ground motion duration considering two time intervals (5–75% and 5–95%) for the accumulation of the Arias Intensity IA. An analysis of the data shows that the mean ratio between D5-95 and D5-75 is about 2.8. Moreover, the regression also shows that the largest share of variability is due to the within-event component (site term). Among the regression coefficients, the hypocentral distance and the soil conditions appear to have a larger impact on the ground motion duration compared to the earthquake magnitude. It was also observed that the median ground motion durations predicted using the empirical model proposed in this study were much smaller than the ones from the proposed Eurocode 8 draft for the same magnitude range. Finally, geographic trends related to the distribution of residuals were also evaluated using the data from the three earthquakes with the largest number of available ground motion recordings.

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Effects of Ground Motion Duration on the Seismic Performance of a Two-Storey Balloon-Type CLT Building

Cited by 4 publications

References 30 publications

Assessing the Impact of Ground Motion Duration on Losses in Typical Modern Steel Moment Frames

Assessing the Impact of Ground Motion Duration on Losses in Typical Modern Steel Moment Frames

Research on Damage Mechanism and Performance-Based Design Process of Reinforced Concrete Column Members

Ground Motion Duration Patterns for Vrancea (Romania) Intermediate-Depth Earthquakes

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