Exact stiffness matrix for nonlocal bars embedded in elastic foundation media: the virtual-force approach

2014 ◽  
Vol 89 (1) ◽  
pp. 163-176 ◽  
Author(s):  
Suchart Limkatanyu ◽  
Woraphot Prachasaree ◽  
Nattapong Damrongwiriyanupap ◽  
Minho Kwon
Keyword(s):  
Elastic Foundation ◽  
Stiffness Matrix ◽  
Virtual Force ◽  
Exact Stiffness Matrix

Exact stiffness matrix for beams on elastic foundation

1985 ◽  
Vol 21 (6) ◽  
pp. 1355-1359 ◽  
Author(s):  
Moshe Eisenberger ◽  
David Z. Yankelevsky
Keyword(s):  
Elastic Foundation ◽  
Stiffness Matrix ◽  
Beams On Elastic Foundation ◽  
Exact Stiffness Matrix

scholarly journals Frame on Elastic Foundation / Rám Na Pružnom Podloží

2012 ◽  
Vol 12 (2) ◽  
pp. 216-224
Author(s):  
Katarína Tvrdá
Keyword(s):  
Elastic Foundation ◽  
Stiffness Matrix ◽  
Beam Element ◽  
Winkler Foundation ◽  
Displacement Method ◽  
Exact Stiffness Matrix

Abstract This article deals with calculation of the beam and frame rested on elastic foundation using matrix displacement method. An exact stiffness matrix of a beam element on elastic foundation is formulated. The beam is rested on elastic Winkler foundation. At the end off paper, same results of frame on elastic foundation are presented.

An Exact Three-Dimensional Beam Element With Nonuniform Cross Section

2010 ◽  
Vol 77 (6) ◽  
Author(s):  
M. Jafari ◽  
M. J. Mahjoob
Keyword(s):  
Cross Section ◽  
Stiffness Matrix ◽  
Degrees Of Freedom ◽  
Direct Method ◽  
Three Dimensional ◽  
Curved Beams ◽  
Element Analysis ◽  
Shear Loads ◽  
Line Passing ◽  
Exact Stiffness Matrix

In this paper, the exact stiffness matrix of curved beams with nonuniform cross section is derived using direct method. The considered element has two nodes and 12 degrees of freedom, with three forces and three moments applied at each node. The noncoincidence effect of shear center and center of area is also considered in this element. The deformations of the beam are due to bending, torsion, tensile, and shear loads. The line passing through center of area is a general three-dimensional curve and the cross section properties may change arbitrarily along it. The method is extended to deal with distributed loads on the curved beams. The stiffness matrix of some selected types of beams is determined by this method. The results are compared (where possible) with previously published results, simple beam finite element analysis and analytic solution. It is shown that the determined stiffness matrix is exact and that any type of beam can be analyzed by this method.

BUCKLING OF COLUMNS WITH INTERNAL SLIDE RELEASE

2002 ◽  
Vol 02 (04) ◽  
pp. 593-598 ◽  
Author(s):  
M. EISENBERGER ◽  
H. AMBARSUMIAN
Keyword(s):  
Stiffness Matrix ◽  
Buckling Load ◽  
Buckling Loads ◽  
Simply Supported ◽  
Axial Forces ◽  
Exact Stiffness Matrix

The exact buckling loads of columns with internal slide release are found using the exact stiffness matrix of the column including the effect of the axial forces. Two types of columns are considered: clamped–clamped and clamped-simply supported with internal slide release at variable locations along the member. It is found that for both the clamped–clamped and the clamped-simply supported columns the buckling load is constant and does not depend on the location of the slide discontinuity.

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