Seismic behavior of irregular reinforced-concrete structures under multiple earthquake excitations

Oyguç, Reşat; TOROS, Çağatay; Abdelnaby, Adel E.

doi:10.1016/j.soildyn.2017.10.002

Cited by 63 publications

(22 citation statements)

References 28 publications

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“…Vertical irregularity in 2-and 3-story buildings can exist due to vertical setbacks, short column effect, and soft story effect on the ground floor. Due to adverse effects of vertical irregularity on seismic performance of buildings [47,48], its corresponding score modifier for all types of buildings is negative. This modifier due to its significant adverse effect has assigned the highest negative score modifier in the calculation of the final structural score.…”

Section: Vertical Irregularitymentioning

confidence: 99%

Seismic vulnerability assessment of building stock of Malakand (Pakistan) using FEMA P-154 method

et al. 2019

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Earthquakes have caused huge infrastructural damages along with loss of lives in the recent past. Continuous subduction of the Indian plate beneath the Eurasian plate has made Pakistan a seismically active region in the world. Malakand, located in the Khyber Pakhtunkhwa Province of Pakistan, is declared at high earthquake risk by the National Disaster Management Authority of Pakistan, warranting a seismic vulnerability assessment study for its existing building stock. Vulnerability assessment of a representative sample of different building use-types was carried out using the rapid visual screening (RVS) procedure of FEMA P-154. The sample size was calculated based on Yamane formula. RVS sheets are used to calculate structural scores, and likely seismogenic damage is depicted as a function of damage grades of European Macro Seismic Scale. Of the building stock inspected, it was observed that almost half of the buildings fall in damage grade 4 and 5, implying a strong probability of heavy structural and non-structural damages in the case of future earthquake occurrence. Government school buildings were found to be less vulnerable than private counterparts. Most of the commercial buildings were not constructed according to building code, making them highly susceptible to damage. Based on the results of vulnerability assessment of building structures, the article recommends implementation of building codes which can lead to a decrease in infrastructural damages and economic losses in the wake of a future seismic event.

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Section: Vertical Irregularitymentioning

confidence: 99%

Seismic vulnerability assessment of building stock of Malakand (Pakistan) using FEMA P-154 method

et al. 2019

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“…Various damage models for component have been proposed by researchers (Colombo and Negro, 2005;Oyguc et al, 2017;Park and Ang, 1985;Powell and Allahabadi, 1988), and most of them are related to the deformation, stiffness degradation, and the energy parameters. In this article, the section damage index of structural component is defined as follows The seismic failure modes are classified according to the characteristics of the inter-story drift ratio distribution, and the average damage index of end sections under the lth seismic failure mode is defined as…”

Section: Damage Indexmentioning

confidence: 99%

Seismic failure mode identification and multi-objective optimization for steel frame structure

Xiao

et al. 2018

Advances in Structural Engineering

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In this study, a combined performance-based seismic failure mode identification and multi-objective optimization method is proposed, in which the failure probability function is introduced to identify the primary structural failure mode with a certain probability level, and the structural damage and hysteretic energy are taken as indices in the objective function to improve the structure's seismic performance. Taking a 20-story steel frame structure as an example, seismic failure modes are identified and optimized using this method. Results indicate that global damage to the optimized structure is reduced under 62% earthquake excitations, while the hysteretic energy dissipation capacity of the optimized structure is improved under 48.3% earthquake excitations. Furthermore, the distribution of the optimized structure's inter-story drift ratio is more uniform than in the original structure, leading to a significant improvement of the structural seismic performance.

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“…However, an irregular structure is likely to experience strong ground motions during its useful life, causing damage. [31][32][33] In this case, the robustness of the control algorithm against any changes in the structural parameters due to damages must be investigated. In recent years, the use of structural health monitoring (SHM) strategy in order to enhance the control performance of structures has received much attention, resulting in the development of smart building structures.…”

Section: Introductionmentioning

confidence: 99%

Torsional control of asymmetric buildings using online 3‐D damage detection and adaptive stiffness devices

Karami

Ahmadi

2021

Struct Control Health Monit

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Developing a smart civil structure, in which the structure instantaneously identifies damages during vibration and makes decisions to compensate or reduce them, is one of the new issues in the seismic control of structures. One of the most important challenges in asymmetric buildings is the torsion due to the damage occurrence in the structure during severe excitation. The aim of this study is to try to reduce the torsional effects and dynamic responses of the structure by combining two strategies, including real time structural health monitoring (SHM) and semi-active control. Hence, a new damage detection method based on identified Markov parameters of the system is proposed to identify the damage in 3-D shear model structures. Also, in order to create a smart structure, a new controller is designed to regulate mechanical characteristics of the installed adaptive stiffness devices based on the detected damages and eccentricity variations in the structure. The performance of the proposed

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Seismic behavior of irregular reinforced-concrete structures under multiple earthquake excitations

Cited by 63 publications

References 28 publications

Seismic vulnerability assessment of building stock of Malakand (Pakistan) using FEMA P-154 method

Seismic vulnerability assessment of building stock of Malakand (Pakistan) using FEMA P-154 method

Seismic failure mode identification and multi-objective optimization for steel frame structure

Torsional control of asymmetric buildings using online 3‐D damage detection and adaptive stiffness devices

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