Seismic collapse safety of reinforced concrete moment resisting frames with/without beam-column joint detailing
| العنوان: | Seismic collapse safety of reinforced concrete moment resisting frames with/without beam-column joint detailing |
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| المؤلفون: | Akhtar Naeem Khan, Muhammad Rizwan, Muhammad Ashraf, Naveed Ahmad, Qaisar Ali |
| المصدر: | Bulletin of the New Zealand Society for Earthquake Engineering. 54:1-20 |
| بيانات النشر: | New Zealand Society for Earthquake Engineering, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 021110 strategic, defence & security studies, business.industry, Frame (networking), 0211 other engineering and technologies, 020101 civil engineering, 02 engineering and technology, Structural engineering, Amplification factor, Geotechnical Engineering and Engineering Geology, Incremental Dynamic Analysis, Displacement (vector), 0201 civil engineering, Seismic analysis, Moment (mathematics), Deflection (engineering), business, Joint (geology), Geology, Civil and Structural Engineering |
| الوصف: | FEMA-P695 procedure was applied for seismic collapse safety evaluation of reinforced concrete moment resisting frames with/without beam-column joint detailing common in Pakistan. The deficient frame lacks shear reinforcement in joints and uses concrete of low compressive strength. Shake-table tests were performed on 1:3 reduced scale two-story models, to understand the progressive inelastic response of chosen frames and calibrate the inelastic finite-element based models. The seismic design factors i.e. response modification coefficient, overstrength, ductility, and displacement amplification factors (R, W0, Rμ, Cd) were quantified. Response modification factor R = 7.05 was obtained for the frame with beam-column joint detailing while R = 5.30 was obtained for the deficient frame. The corresponding deflection amplification factor Cd/R was found equal to 0.82 and 1.03, respectively. A suite of design spectrum compatible accelerograms was obtained from PEER strong ground motions for incremental dynamic analysis of numerical models. Collapse fragility functions were developed using a probabilistic nonlinear dynamic reliability-based method. The collapse margin ratio (CMR) was calculated as the ratio of seismic intensity corresponding to the 50th percentile collapse probability to the seismic intensity corresponding to the MCE level ground motions. It was critically compared with the acceptable CMR (i.e. the CMR computed with reference to a seismic intensity corresponding to the 10% collapse probability instead of MCE level ground motions). Frame with shear reinforcement in beam-column joints has achieved CMR 11% higher than the acceptable thus passing the criterion. However, the deficient frame achieved CMR 29% less than the conforming frame. This confirms the efficacy of beam-column joint detailing in reducing collapse risk. |
| تدمد: | 2324-1543 1174-9857 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::0346f44e5b81a96e01356e36059cdcd8 https://doi.org/10.5459/bnzsee.54.1.1-20 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........0346f44e5b81a96e01356e36059cdcd8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 23241543 11749857 |
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