Panagis Papadopoulos - Academia.edu (original) (raw)

Panagis Papadopoulos

Retired Assistant Professor of Structural Engineering, Department of Civil Engineering, Aristotle University of Thessaloniki, Greece

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Papers by Panagis Papadopoulos

Research paper thumbnail of Simplified Step-by-Step Nonlinear Static Program Investigating Equilibrium Conditions of Electrons in Atom and Ionization Energies: Case Study on Argon

Open Journal of Physical Chemistry

Research paper thumbnail of Numerical study on the behavior of cables of cable-stayed bridges

Research paper thumbnail of Nonlinear seismic analysis of R/C frames by network models

Research paper thumbnail of Analysis of a portal steel frame subject to fire by use of a truss model

Research paper thumbnail of Comparison of Codes and Truss model requirements for Confinement

Research paper thumbnail of A simple program for the dynamic analysis of network models

Research paper thumbnail of A truss model with structural instability for the confinement of concrete columns

Research paper thumbnail of A truss model for the confinement of concrete columns

Research paper thumbnail of Comparison of a truss model for confinement with UBC and NZS requirements

Research paper thumbnail of Nonlinear analysis of infilled plane RC frames

Research paper thumbnail of Simple analysis of RC frames with soft first story

Research paper thumbnail of Amount of confinement preventing global instability of a RC column

Research paper thumbnail of A network model with substructures for seismic analysis of RC frames

Research paper thumbnail of Analysis of steel frame with pitched roof exposed to fire by a truss model

Research paper thumbnail of Recent Developments in Engineering Research Vol. 4

Research paper thumbnail of Simplified non-linear seismic analysis of infilled reinforced concrete frames

Earthquake Engineering & Structural Dynamics, 2004

Research paper thumbnail of Simple Nonlinear Static Analysis Using Truss Models for Modeling Snap-through of Thin Shallow Arches

Applied Mechanics and Materials, 2012

In this paper, a truss model is used for the geometrically nonlinear static analysis of a thin sh... more In this paper, a truss model is used for the geometrically nonlinear static analysis of a thin shallow arch subject to snap-through. Thanks to the very simple geometry of a truss, the equilibrium conditions can be easily written and the global stiffness matrix can be easily updated with respect to the deformed structure, within each step of the analysis. A very coarse discretization is applied. For the geometrically nonlinear static analysis, a short computer program has been developed by displacement control of a plane truss model of a structure. This very short, fully documented computer program is applied on the geometrically nonlinear static analysis of a specific thin shallow arch subject to snap-through.

Research paper thumbnail of Achievements of Truss Models for Reinforced Concrete Structures

Open Journal of Civil Engineering, 2012

Research paper thumbnail of Numerical Study On The Behavior Of Cables OfCable-stayed Bridges

A simple method is proposed for the nonlinear static analysis of cable-stayed bridges, with empha... more A simple method is proposed for the nonlinear static analysis of cable-stayed bridges, with emphasis on the analysis of cables. The bridge is simulated by a plane truss model. A short computer program, with less than 200 Fortran instructions, is used, for the nonlinear static analysis, by incremental loading, of the above truss model. Geometric nonlinearities are taken into account by writing the equilibrium conditions with respect to deformed structure, within each step of the algorithm. The sag effect of cables is considered by assuming them to be the axial structural members with the equivalent elasticity modulus of Ernst. The above method is applied on a typical cable-stayed bridge with a central span of about 200m. The results are found to be in satisfactory approximation with other published data. Seismic inertia loads, parallel to the bridge axis, are applied to all the nodes of the truss. These loads combined with dead loads only, cause, in the back-stay, a state near slacke...

Research paper thumbnail of A simple method using a truss model for in-plane nonlinear static analysis of a cable-stayed bridge with a plate deck section

Engineering Structures, 2008

A beam element is simulated by a plane truss, which exhibits the same axial and flexural stiffnes... more A beam element is simulated by a plane truss, which exhibits the same axial and flexural stiffness. A short computer program has been developed for the nonlinear static analysis of a plane truss model of a beam structure, with incremental loading. The geometric nonlinearities, due to large displacements interacting with large axial forces, are taken into account by writing the

Research paper thumbnail of Simplified Step-by-Step Nonlinear Static Program Investigating Equilibrium Conditions of Electrons in Atom and Ionization Energies: Case Study on Argon

Open Journal of Physical Chemistry

Research paper thumbnail of Numerical study on the behavior of cables of cable-stayed bridges

Research paper thumbnail of Nonlinear seismic analysis of R/C frames by network models

Research paper thumbnail of Analysis of a portal steel frame subject to fire by use of a truss model

Research paper thumbnail of Comparison of Codes and Truss model requirements for Confinement

Research paper thumbnail of A simple program for the dynamic analysis of network models

Research paper thumbnail of A truss model with structural instability for the confinement of concrete columns

Research paper thumbnail of A truss model for the confinement of concrete columns

Research paper thumbnail of Comparison of a truss model for confinement with UBC and NZS requirements

Research paper thumbnail of Nonlinear analysis of infilled plane RC frames

Research paper thumbnail of Simple analysis of RC frames with soft first story

Research paper thumbnail of Amount of confinement preventing global instability of a RC column

Research paper thumbnail of A network model with substructures for seismic analysis of RC frames

Research paper thumbnail of Analysis of steel frame with pitched roof exposed to fire by a truss model

Research paper thumbnail of Recent Developments in Engineering Research Vol. 4

Research paper thumbnail of Simplified non-linear seismic analysis of infilled reinforced concrete frames

Earthquake Engineering & Structural Dynamics, 2004

Research paper thumbnail of Simple Nonlinear Static Analysis Using Truss Models for Modeling Snap-through of Thin Shallow Arches

Applied Mechanics and Materials, 2012

In this paper, a truss model is used for the geometrically nonlinear static analysis of a thin sh... more In this paper, a truss model is used for the geometrically nonlinear static analysis of a thin shallow arch subject to snap-through. Thanks to the very simple geometry of a truss, the equilibrium conditions can be easily written and the global stiffness matrix can be easily updated with respect to the deformed structure, within each step of the analysis. A very coarse discretization is applied. For the geometrically nonlinear static analysis, a short computer program has been developed by displacement control of a plane truss model of a structure. This very short, fully documented computer program is applied on the geometrically nonlinear static analysis of a specific thin shallow arch subject to snap-through.

Research paper thumbnail of Achievements of Truss Models for Reinforced Concrete Structures

Open Journal of Civil Engineering, 2012

Research paper thumbnail of Numerical Study On The Behavior Of Cables OfCable-stayed Bridges

A simple method is proposed for the nonlinear static analysis of cable-stayed bridges, with empha... more A simple method is proposed for the nonlinear static analysis of cable-stayed bridges, with emphasis on the analysis of cables. The bridge is simulated by a plane truss model. A short computer program, with less than 200 Fortran instructions, is used, for the nonlinear static analysis, by incremental loading, of the above truss model. Geometric nonlinearities are taken into account by writing the equilibrium conditions with respect to deformed structure, within each step of the algorithm. The sag effect of cables is considered by assuming them to be the axial structural members with the equivalent elasticity modulus of Ernst. The above method is applied on a typical cable-stayed bridge with a central span of about 200m. The results are found to be in satisfactory approximation with other published data. Seismic inertia loads, parallel to the bridge axis, are applied to all the nodes of the truss. These loads combined with dead loads only, cause, in the back-stay, a state near slacke...

Research paper thumbnail of A simple method using a truss model for in-plane nonlinear static analysis of a cable-stayed bridge with a plate deck section

Engineering Structures, 2008

A beam element is simulated by a plane truss, which exhibits the same axial and flexural stiffnes... more A beam element is simulated by a plane truss, which exhibits the same axial and flexural stiffness. A short computer program has been developed for the nonlinear static analysis of a plane truss model of a beam structure, with incremental loading. The geometric nonlinearities, due to large displacements interacting with large axial forces, are taken into account by writing the

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