Identification of incremental seismic damage development in RC structures excited with sequence-type ground motions

During earthquakes, out-of-phase vibrations in adjacent buildings with limited distance may cause pounding between them. In recent years, the use of seismic isolation has expanded considerably as an effective approach to reduce seismic damage. However, the isolated building experiences large displacements during earthquakes, and there is a possibility of collisions with adjacent structures. The research on earthquake-induced pounding of base-isolated buildings has been mainly focused on interactions between low structures. In this paper, the influence of structural pounding on the response of medium-to-high-rise base-isolated buildings is investigated under different ground motions. The analysis has been focused on collisions between two insufficiently separated five-story and eight-story base-isolated and fixed base buildings aligned in three different configurations. The results of the study indicate that structural pounding may significantly increase the response of medium-to-high-rise base-isolated buildings during earthquakes. Moreover, substantial dependence of the structural behavior on the gap size between structures has been observed. The general trend shows the reduction in the pounding-involved response with the increase in the gap size value. The results indicate that the increase in the response of the base-isolated building is larger when the height of the structure is bigger. They also show that larger amplifications of peak accelerations of the upper stories can be expected due to collisions. On the other hand, the amplifications of the story shears have not shown any specific trend for different stories of the analyzed base-isolated building.

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Impact of spatial correlation of ground motions on seismic damage for residential buildings in Bucharest, Romania

Natural Hazards ◽

10.1007/s11069-017-2814-6 ◽

2017 ◽

Vol 87 (2) ◽

pp. 1167-1187 ◽

Cited By ~ 5

Author(s):

Florin Pavel ◽

Radu Vacareanu ◽

Ileana Calotescu ◽

Ana-Maria Sandulescu ◽

Cristian Arion ◽

...

Keyword(s):

Spatial Correlation ◽

Residential Buildings ◽

Ground Motions ◽

Seismic Damage

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DAMAGE EVOLUTION SPECTRA FOR SEISMIC ANALYSIS OF HIGH-RISE BUILDINGS

Journal of Earthquake and Tsunami ◽

10.1142/s1793431112500212 ◽

2012 ◽

Vol 06 (03) ◽

pp. 1250021

Author(s):

Y. B. HO ◽

J. S. KUANG

Keyword(s):

Damage Evolution ◽

Seismic Analysis ◽

Ground Motions ◽

Time History ◽

Tall Buildings ◽

Response Spectra ◽

Seismic Damage ◽

Analysis And Design ◽

High Rise ◽

Earthquake Ground Motions

Seismic response spectra are amongst one of the most important tools for characterizing earthquake ground motions. In design practice, the response spectra are presented without including any load history, hence the nonlinear analysis of structures based solely on conventional earthquake response spectra is theoretically unsound, particularly for long-period or vertically irregular high-rise buildings. In this paper, a concept of seismic damage evolution is introduced and the method of analysis for characterizing the process of seismic damage to structures under earthquakes is presented. Seismic damage evolution spectra for analysis and design of high-rise buildings are then developed as an effective means of describing and simplifying earthquake ground motions. These spectra are shown to be very useful in selecting the ground motion-time history and, particularly, validating the equivalent static-load analysis and design of high-rise buildings under near-fault pulse-like ground motions. Case studies of the seismic inelastic performance of two vertically irregular, tall buildings are presented considering the seismic damage evolution spectra.

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Embankment seismic fragility assessment: A case study on Xi’an-Baoji expressway (China)

PLoS ONE ◽

10.1371/journal.pone.0246407 ◽

2021 ◽

Vol 16 (2) ◽

pp. e0246407

Author(s):

Fa Che ◽

Chao Yin ◽

Xingkui Zhao ◽

Zhinan Hu ◽

Lu Sheng ◽

...

Keyword(s):

Fragility Curves ◽

Retaining Wall ◽

Seismic Damage ◽

Damage Parameter ◽

Seismic Fragility ◽

Response Analysis ◽

Rc Structures ◽

Fill Soil ◽

Soil Foundation ◽

Wall System

Although embankment seismic damages are very complex, there has been little seismic fragility research yet. Researches on seismic fragility of bridges, dams and reinforced concrete (RC) structures have achieved fruitful results, which can provide references for embankment seismic fragility assessment. Meanwhile, the influencing degrees of retaining structures, such as retaining walls on the embankment seismic performances are still unclear. The K1025+470 embankment of the Xi’an-Baoji expressway was selected as the research object, and the finite difference models of the embankment fill-soil foundation system and embankment fill-soil foundation-retaining wall system were established. The ground-motion records for Incremental Dynamic Analysis (IDA) were selected and the dynamic response analysis were conducted. Probabilistic Seismic Demand Analysis (PSDA) was used to deal with the IDA results and the seismic fragility curves were generated. Based on the assessment results, the influences of the retaining wall on the embankment seismic fragility were further verified. The research results show that regardless of which seismic damage parameter is considered or the presence or absence of the retaining wall, larger PGAs always correspond to higher probabilities of each seismic damage grade. Seismic damages to the embankment fill-soil foundation-retaining wall system are always lower than those of the embankment fill-soil foundation system under the same PGA actions, thus, the retaining wall can decrease the embankment seismic fragility significantly.

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A computational approach for the seismic damage response under multiple earthquakes excitations of adjacent RC structures strengthened by ties

Computers & Mathematics with Applications ◽

10.1016/j.camwa.2015.08.012 ◽

2015 ◽

Vol 70 (11) ◽

pp. 2742-2751 ◽

Cited By ~ 2

Author(s):

Angelos Liolios ◽

Athanasios Karabinis ◽

Asterios Liolios ◽

Stefan Radev ◽

Krassimir Georgiev ◽

...

Keyword(s):

Seismic Damage ◽

Computational Approach ◽

Rc Structures ◽

Damage Response ◽

Multiple Earthquakes

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Damage-based yield point spectra for sequence-type ground motions

Bulletin of Earthquake Engineering ◽

10.1007/s10518-020-00874-4 ◽

2020 ◽

Vol 18 (10) ◽

pp. 4705-4724

Author(s):

Yongqun Zhang ◽

Jiaxu Shen ◽

Jun Chen

Keyword(s):

Yield Point ◽

Ground Motions ◽

Sequence Type

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Experimental Study on Seismic Damage Model of the SRHSHPC Composite Frame Columns

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.145 ◽

2008 ◽

Vol 385-387 ◽

pp. 145-148

Author(s):

Shan Suo Zheng ◽

Liang Zhang ◽

Lei Li ◽

Bin Wang ◽

Ming Xie

Keyword(s):

Concrete Strength ◽

Damage Model ◽

Damage Index ◽

Seismic Damage ◽

Damage Development ◽

Damage Models ◽

Composite Frame ◽

History Of ◽

Reversed Loading ◽

Seismic Behaviors

Based on experimental investigation under low cyclic reversed loading, the seismic behaviors and seismic damage model for steel reinforced high strength and high performance concrete (SRHSHPC) composite frame columns are studied. Several existing seismic damage models are firstly presented and their characteristics are comparatively analyzed. From the test results of low cyclic reversed loading, the variation history of cumulative dissipated hysteretic energy of the SRHSHPC composite frame columns under different loading cycle levels is figured out, and the influence of axial compression ratio, shear span ratio, stirrup ratio and concrete strength on the cumulative dissipated hysteretic energy is also discussed. The damage index of the SRHSHPC composite frame columns is compared according to the existing seismic damage models, and the seismic damage model adapted for the SRHSHPC composite frame columns is established. According to the variation history of the damage index under different loading cycle levels, the rule of damage development for the SRHSHPC composite frame columns is proposed. The influence of axial compression ratio, shear span ratio, stirrup ratio and concrete strength on the damage development is also discussed. The results indicate that the seismic behaviors of the SRHSHPC composite frame column are outstanding, and the seismic damage model could give a quantitative description for damaging process of the samples, which is reference for establishing more rational damage criteria for the SRHSHPC earthquake-resistant composite structure.

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