Nonlinear inelastic analysis of steel frameworks with non-prismatic members and semi-rigid connections
Abstract eng: This paper presents a new computer method for nonlinear inelastic analysis of steel frames with non-prismatic members and semi-rigid connections. The behavior model accounts for material inelasticity (concentrated plasticity) due to combined bending and axial force, geometrical nonlinear effects in conjunction with initial geometric imperfections using only one element per physical member. The method ensures also that the plastic bending moment is nowhere exceeded once a full plastified section develops. The proposed formulation combines the power series approach with the Maxwell-Mohr method to compute the flexibility coefficients of the Euler-Bernoulli beamcolumn element in the presence of initial geometric imperfections, lateral loads acting along the member length and axial load. The second-order elasto-plastic tangent stiffness matrix and equivalent nodal loads vector of non-prismatic 2D beam-column element with semi-rigid connections is developed and the proposed nonlinear analysis formulation has been implemented in a computer program. In order to verify the efficiency and accuracy of the proposed approach, several examples analyzed by other researchers have been carried out and the results prove the performance of the proposed method.
Contributors:
Publisher:
Taylor and Francis Group, London, UK
Conference Title:
Conference Title:
Sixth International Conference on Structural Engineering, Mechanics and Computation
Conference Venue:
Cape Town, South Africa
Conference Dates:
2016-09-05 / 2016-09-07
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-09-20, last modified 2016-09-20
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