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Ahmad, Haseeb,Fahad, Muhammad,Aslam, Muhammad Techno-Press 2022 Structural monitoring and maintenance Vol.9 No.1
The use of concrete filled steel tube (CFST) column is widely accepted due to its property of high axial load carrying capacity, more ductility and more resistant to earthquake specially using in bridges and high-rise buildings. The initial imperfection (δ) that produces during casting or fixing causes the reduction in load carrying capacity, this is the reason, experimental capacity is always less then theoretical one. In this research, the effect of δ on load carrying capacity and behavior of concrete filled steel tube (CFST) column have been investigated by numerically simulation of large number of models with different δ and other geometric parameters that include length (L), width (B), steel tube thickness (t), f'<sub>c</sub> and f<sub>y</sub>. Finite element analysis software ANSYS v18 is used to develop model of SCFST column to evaluate strength capacity, buckling and failure pattern of member which is applied during experimental study under cyclic axial loading. After validation of results, 42 models with different parameters are evaluated to develop empirical equation predicting axial load carrying capacity for different value of δ. Results indicate that empirical equation shows the 0 to 9% error for finite element analysis Forty-two models in comparison with ANSYS results, respectively. Empirical equation can be used for predicting the axial capacity of early estimating the axial capacity of SCFT column including 𝛿.
ON ALMOST r-PARACONTACT RIEMANNIAN MANIFOLD WITH A CERTAIN CONNECTION
Ahmad, Mobin,Haseeb, Abdul,Jun, Jae-Bok,Rahman, Shamsur Korean Mathematical Society 2010 대한수학회논문집 Vol.25 No.2
In a Riemannian manifold, the existence of a new connection is proved. In particular cases, this connection reduces to several symmetric, semi-symmetric and quarter symmetric connections, even some of them are not introduced so far. So, in this paper, we define a quarter symmetric semi-metric connection in an almost r-paracontact Riemannian manifold and consider invariant, non-invariant and anti-invariant hypersurfaces of an almost r-paracontact Riemannian manifold with that connection.
Ahmad, Mobin,Jun, Jae-Bok,Haseeb, Abdul 대한수학회 2009 대한수학회보 Vol.46 No.3
We define a quarter symmetric metric connection in an almost r-paracontact Riemannian manifold and we consider invariant, noninvariant and anti-invariant hypersurfaces of an almost r-paracontact Riemannian manifold endowed with a quarter symmetric metric connection.
Ahmad, Mobin,Haseeb, Abdul,Ozgur, Cihan Department of Mathematics 2009 Kyungpook mathematical journal Vol.49 No.3
We define a quarter symmetric non-metric connection in an almost r-paracontact Riemannian manifold and we consider invariant, non-invariant and anti-invariant hypersurfaces of an almost r-paracontact Riemannian manifold endowed with a quarter symmetric non-metric connection.
QUASI-CONCIRCULAR CURVATURE TENSOR ON A LORENTZIAN β-KENMOTSU MANIFOLD
Ahmad, Mobin,Haseeb, Abdul,Jun, Jae Bok Chungcheong Mathematical Society 2019 충청수학회지 Vol.32 No.3
In the present paper, we study quasi-concircular curvature tensor satisfying certain curvature conditions on a Lorentzian ${\beta}$-Kenmotsu manifold with respect to the semi-symmetric semi-metric connection.
Mobin Ahmad,Jae-Bok Jun,Abdul Haseeb 충청수학회 2011 충청수학회지 Vol.24 No.1
We dene a quarter-symmetric non-metric connection in an almost r-paracontact Riemannian manifold and we consider the submanifolds of an almost r-paracontact Riemannian manifold endowed with a quarter-symmetric non-metric connection. We also obtain the Gauss, Codazzi and Weingarten equations and the cur- vature tensor for the submanifolds of an almost r-paracontact Rie- mannian manifold endowed with a quarter-symmetric non-metric connection.
Semi-symmetric semi-metric connection in a Lorentzian β-Kenmotsu manifold
Abdul Haseeb,전재복,MOHD. DANISH SIDDIQI,Mobin Ahmad 장전수학회 2017 Advanced Studies in Contemporary Mathematics Vol.27 No.4
In the present paper, we consider a semi-symmetric semi-metric connection in a Lorentzian β-Kenmotsu manifold. We investigate the curvature tensor and the Ricci tensor of a Lorentzian β-Kenmotsu manifold with a semi-symmetric semi-metric connection. Moreover, we consider pseudo projectively flat, ξ-pseudo projectively flat and Φ-pseudo projectively semisymmetric Lorentzian β-Kenmotsu manifolds with a semi-symmetric semi-metric connection and obtain the scalar curvature r in each case.
Mobin Ahmad,전재복,Abdul Haseeb 대한수학회 2009 대한수학회보 Vol.46 No.3
We define a quarter symmetric metric connection in an almost r-paracontact Riemannian manifold and we consider invariant,non-invariant and anti-invariant hypersurfaces of an almost r-paracontact Riemannian manifold endowed with a quarter symmetric metric connection.
QUASI-CONCIRCULAR CURVATURE TENSOR ON A LORENTZIAN β-KENMOTSU MANIFOLD
Mobin Ahmad,Abdul Haseeb,Jae Bok Jun 충청수학회 2019 충청수학회지 Vol.32 No.3
In the present paper, we study quasi-concircular curvature tensor satisfying certain curvature conditions on a Lorentzian β-Kenmotsu manifold with respect to the semi-symmetric semi-metric connection.
Quasi-concircular curvature tensor on a Lorentzian $\beta$-Kenmotsu manifold
Mobin Ahmad,Abdul Haseeb,전재복 충청수학회 2019 충청수학회지 Vol.32 No.3
In the present paper, we study quasi-concircular curvature tensor satisfying certain curvature conditions on a Lorentzian $\beta$-Kenmotsu manifold with respect to the semi-symmetric semi-metric connection.