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RISS 인기검색어
- 검색키워드
- 저자 : Sandeep Shah (검색결과 3 건)
- 무료
- 기관 내 무료
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Feiliang Wang,Sandeep Shah,Xiaoping Wang,Xing-Er Wang,Wang-Xi Zhang,Bo Pang,Jian Yang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.4
The aim of this study is to investigate the effects of varying design variables on the structural behaviour of reinforced concrete (RC) sub-frames under progressive collapse. A finite element modelling approach is presented and validated against the experimental results concerning a 2D frame (3 columns and 2 beams) and a 3D frame (4 columns and 3 beams). The performance of the RC sub-frame is discussed by choosing the scenarios of the exterior, interior, and multiple column loss, respectively, and by increasing the number of stories and bays. Further studies are conducted based on the numerical method to reveal the effect of beam longitudinal reinforcement ratio (BLRR), beam section depth (BSD), and concrete compression strength (CCS). The results show that both BLRR, CCS and BSD have a significant influence on the compressive arch action (CAA) capacity of the structure under progressive collapse, and the load-carrying capacity of the RC sub-frame increases with an increasing number of stories.
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Rishendra Verma,Sandeep Kumar Singh,Devendra H.Shah 대한수의학회 2004 Journal of Veterinary Science Vol.5 No.4
Forty mycobacterial strains comprising clinical Indian isolates of Mycobacterium tuberculosis (28 field isolates + 1H37 Rv) and Mycobacterium bovis (10 field isolates + 1 AN5) were subjected to restriction fragment length polymorphism analysis (RFLP) using IS6110 and IS1081 probes. Most of these strains originated from dairy cattle herd and human patients from Indian Veterinary research Institute (IVRI) campus isolated from the period of 1986 to 2000. Our study showed presence of 8 copies of IS6110 in most of the M.tuberculosis (96.6%) strains irrespective of their origin with the exception of one M.tuberculosis strain with presence of an extra copy (3.4%). All M.bovis strains showed a single copy of IS6110 on the characteristic 1.9kb restriction fragment. RFLP analysis with IS1081 invariably showed the presence of 5 copies in all isolates of M.bovis and M.tuberculosis at the same chromosomal location. Similarity of IS6110 RFLP fingerprints of M.tuberculosis strains from animals and human suggested the possibility of dissemination of single M.tuberculosis strain among animals as well as human. It was not possible to discriminate within the isolates of either M.tuberculosis or M.bovis, when IS1081 was used as target sequence. The IS6110 RFLP is a valuable tool for disclosing transmission chain of M. tuberculosis and M. bovis among humans as well as animals.
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Feiliang Wang,Jian Yang,Sandeep Shah 대한토목학회 2020 KSCE Journal of Civil Engineering Vol.24 No.3
The aim of this study is to reveal the effect of horizontal restraints on the progressive collapse behaviour of precast concrete (PC) framed substructures. To this end, two one-thirds-scale 2-storey 2-span beam-column sub-frames with varying horizontal restraint conditions have been experimentally investigated. A nonlinear finite element (FE) model based on ABAQUS package was established and validated against failure modes and load-carrying capacity recorded in the test. Parametric studies were conducted using the FE simulation approach to investigate the effect of key design variables on the performance of the PC sub-frames. It was found that the failure of the PC beam-column assemblies was dominated by pull-out of anchorage bars on side joints and the load-carrying capacity of the PC sub-frames wereconsiderably affected by horizontal restraints.
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