Local buckling check according to Eurocode-3 for plastic-hinge analysis of 3-D steel frames

2008 ◽  
Vol 30 (11) ◽  
pp. 3105-3113 ◽  
Author(s):  
Hoang Van Long ◽  
Nguyen Dang Hung
Keyword(s):  
Plastic Hinge ◽  
Steel Frames ◽  
Local Buckling ◽  
Eurocode 3

Analysis Methods Investigation of Steel Frames Accounting for Local Buckling

2011 ◽  
Vol 243-249 ◽  
pp. 1391-1395 ◽  
Author(s):  
Lian Kun Wang
Keyword(s):  
Flexural Strength ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Local Buckling ◽  
Shell Elements ◽  
Design Specifications ◽  
Inelastic Analysis ◽  
Analysis Methods ◽  
Eurocode 3 ◽  
Nonlinear Shell

Second-order inelastic analysis should be directly performed in order to overcome the difficulties of the conventional approach, but most of these analyses assume the section to be compact, and do not account for the degradation of the flexural strength caused by local buckling. Since the sections of real structures are not always compact, the analysis should be improved to consider local buckling. The objective of this paper is to investigate the plastic-zone and plastic hinge analysis methods of steel frames accounting for local buckling with nonlinear shell elements and design specifications as AICS-LRFD and Eurocode 3, which may be used as reference for the further study.

Experimental Research and Finite Element Analysis on Behavior of Steel Frame with Semi-Rigid Connections

2010 ◽  
Vol 168-170 ◽  
pp. 553-558
Author(s):  
Feng Xia Li ◽  
Bu Xin
Keyword(s):  
Architectural Design ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Seismic Energy ◽  
Internal Force ◽  
Steel Frame ◽  
Frame Structure ◽  
Element Analysis ◽  
Rigid Deformation ◽  
Steel Frame Structure

Most steel beam-column connections actually show semi-rigid deformation behavior that can contribute substantially to overall displacements of the structure and to the distribution of member forces. Steel frame structure with semi-rigid connections are becoming more and more popular due to their many advantages such as the better satisfaction with the flexible architectural design, low inclusive cost and environmental protect as well. So it is very necessary that studying the behavior of those steel frame under cyclic reversal loading. On the basics of connections experiments the experiment research on the lateral resistance system of steel frame structure has been completed. Two one-second scale, one-bay, two-story steel frames with semi-rigid connections under cyclic reversal loading. The seismic behavior of the steel frames with semi-rigid connections, including the failure pattern, occurrence order of plastic hinge, hysteretic property and energy dissipation, etc, was investigated in this paper. Some conclusions were obtained that by employing top-mounted and two web angles connections, the higher distortion occurred in the frames, and the internal force distributing of beams and columns was changed, and the ductility and the absorbs seismic energy capability of steel frames can be improved effectively.

scholarly journals An overview of the plastic-hinge analysis of 3D steel frames

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Van-Long Hoang ◽  
Hung Nguyen Dang ◽  
Jean-Pierre Jaspart ◽  
Jean-François Demonceau
Keyword(s):  
Plastic Hinge ◽  
Steel Frames

scholarly journals A Distributed Plasticity Approach for Steel Frames Analysis Including Strain Hardening Effects

2019 ◽  
Author(s):  
Andrius Grigusevičius ◽  
Gediminas Blaževičius
Keyword(s):  
Finite Elements ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Physical Models ◽  
3D Fem ◽  
Stress Strain ◽  
Numerical Application ◽  
Element Analysis ◽  
Plastic Deformations ◽  
Elastic Plastic

This paper focuses on the creation and numerical application of physically nonlinear plane steel frames analysis problems. The frames are analysed using finite elements with axial and bending deformations taken into account. Two nonlinear physical models are used and compared – linear hardening and ideal elastic-plastic. In the first model, distributions of plastic deformations along the elements and across the sections are taken into account. The proposed method allows for an exact determination of the stress-strain state of a rectangular section subjected to an arbitrary combination of bending moment and axial force. Development of plastic deformations in time and distribution along the length of elements are determined by dividing the structure (and loading) into the parts (increments) and determining the reduced modulus of elasticity for every part. The plastic hinge concept is used for the analysis based on the ideal elastic-plastic model. The created calculation algorithms have been fully implemented in a computer program. The numerical results of the two problems are presented in detail. Besides the stress-strain analysis, the described examples demonstrate how the accuracy of the results depends on the number of finite elements, on the number of load increments and on the physical material model. COMSOL finite element analysis software was used to compare the presented 1D FEM methodology to the 3D FEM mesh model analysis.

Second-order plastic-hinge analysis of space semi-rigid steel frames

2012 ◽  
Vol 60 ◽  
pp. 98-104 ◽  
Author(s):  
Cuong Ngo-Huu ◽  
Phu-Cuong Nguyen ◽  
Seung-Eock Kim
Keyword(s):  
Plastic Hinge ◽  
Steel Frames ◽  
Second Order

A Novel Incremental Iterative Force Recovery Method for Second-Order Beam-Column Elements in Plastic Hinge Analysis of Steel Frames

2021 ◽  
Author(s):  
Yi-Qun Tang ◽  
He Zhu ◽  
Er-Feng Du
Keyword(s):  
Plastic Hinge ◽  
Steel Frames ◽  
Direct Analysis ◽  
High Accuracy ◽  
Second Order ◽  
Single Element ◽  
Recovery Method ◽  
Inelastic Analysis ◽  
Force Recovery ◽  
Plastic Hinge Method

This paper is concerned with an incremental iterative force recovery method in the second-order plastic hinge analysis of steel frames mainly modelled by a single element per member. Second-order beam-column elements are preferred in the direct analysis of steel frames due to their high accuracy and efficiency. However, formulations of these elements are complicated, and therefore they may have a problem of getting element force recovery in inelastic analysis. To overcome this difficulty, a novel incremental iterative force recovery method for second-order beam-column elements is proposed to perform plastic hinge analysis. The proposed method is derived more strictly and has good performance. Also, the section assemblage approach and the refined plastic hinge method are adopted in this study to consider the gradual degradation of section stiffness in the plastic hinge analysis. To verify the accuracy, efficiency and robustness of the proposed method, several benchmark examples are analyzed by the proposed method and compared with solutions reported by early researchers.

The Plastic Hinge

2015 ◽  
pp. 172-230
Keyword(s):  
Reinforced Concrete ◽  
Structural Analysis ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Plastic Hinges

The plastic hinge is a key concept of the theory of frames that differentiates this theory from the remaining models for structural analysis. This chapter is exclusively dedicated to define this concept and describe the different models of plastic hinges. It also discusses the differences of implementation between plastic hinges in steel frames (Sections 6.1-6.4) and those in reinforced concrete structures (Sections 6.5-6.6). This chapter is based on the ideas presented in Chapter 5 and it allows formulating the models for elasto-plastic frames that are introduced in the next chapter.

scholarly journals Refined second-order plastic-hinge dynamic analysis for planar steel frames

2019 ◽  
Vol 1425 ◽  
pp. 012047
Author(s):  
Văn Tú Nguyễn ◽  
Thanh Bìrnh Phạm ◽  
Xuân Bàng Nguyễn
Keyword(s):  
Dynamic Analysis ◽  
Plastic Hinge ◽  
Steel Frames ◽  
Second Order
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