Shape Optimization and Seismic Design of Concrete-Filled Square Tubular Column and Reduced Beam Section with Cut Web

According to anti-seismic design principle of strong column and weak beam, and of strong joint and weak member, reduced beam section(RBS) is often used to shift away plastic hinge from end of beam to weaken region of the beam. Reduced beam section with cut web are analyzed by non-linear finite element method(FEM) in this paper. Two kinds of effective suggested joints of reduced beam section(circled hole and long-circled hole) are put forward by comparing the results of mechanical behavior of reduced beam section with which of traditional RBS, including of ultimate load-carrying capacity, Von-mises stress distribution and the place of largest stress of beam end of the beam-column joints. A proposed seismic design method is put forward according to related chinese codes.

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The seismic response of inelastic structures

Bulletin of the New Zealand Society for Earthquake Engineering ◽

10.5459/bnzsee.8.3.192-203 ◽

1975 ◽

Vol 8 (3) ◽

pp. 192-203

Author(s):

R. D. Sharpe ◽

A. J. Carr

Keyword(s):

Seismic Design ◽

Design Method ◽

Plastic Hinge ◽

Degree Of Freedom ◽

Axial Loads ◽

Earthquake Excitation ◽

Inelastic Structures ◽

Dynamic Analyses ◽

Non Linear ◽

Seismic Design Method

A thirteen storey, two bay, reinforced concrete framed structure is subjected to a series of non-linear, dynamic analyses in an attempt to find some correlation between the damaging potential of various digitised earthquakes and their relative strengths which have been computed in a variety of ways. Much of the previous work in this field has been with respect to simple one degree of freedom systems and these do not appear to give any indication of the correlation that could be expected for a non-linear multi-degree of freedom structure. The results show the effects of the different scalings of the various earthquakes and compare these with those obtained for the familiar North-South component of the May 18, 1940 El Centro earthquake. These results highlight the difficulty of trying to relate the use of such a dynamic earthquake analysis to the present pseudo-static code requirements. Further, the results of the analyses show also the great difference between the present assumption of the plastic hinge distributions, used in the ultimate seismic design method, and those observed during the earthquake excitation with the consequences on the lower-floor column axial loads.

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Seismic Performance of Concrete-Filled Square Tubular Column and Reduced Steel Beam Joints

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.4257 ◽

2010 ◽

Vol 163-167 ◽

pp. 4257-4264

Author(s):

Yan Li Guo ◽

Xing You Yao

Keyword(s):

Carrying Capacity ◽

Ultimate Load ◽

Plastic Hinge ◽

Steel Beam ◽

Load Carrying Capacity ◽

Reduced Beam Section ◽

Load Carrying ◽

Beam Section ◽

Ultimate Load Carrying Capacity ◽

Material Nonlinear

According to anti-seismic design principle of strong column and weak beam, and of strong joint and weak member, reduced beam section (RSB) is often used to shift away plastic hinge from end of beam to the weaken region of the beam. The non-linear finite element models are established for concrete-filled steel square tubular column and reduced steel beam with holes in flange or in flange and web, considering geometric large deformation and material nonlinear. Comparison is made on load-displacement curves, the stress distribution of reduced beams, the ultimate load-carrying capacity, the ductility, and the energy-dissipating ability between analysis results of different RBS joints and experimental results. It shows that the stiffness and ultimate load-carrying capacity of new RBS joints are close to traditional RBS joint, the plastic hinge in the new joints with reduced beam section can be moved to the reduced region, and the new joints display good ductility, energy-dissipating ability and seismic behavior.

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EVALUATION OF PERFORMANCE OF BEAM COLUMN JOINT WITH REDUCED BEAM SECTION

June-2020 - International Journal of Engineering Sciences & Research Technology ◽

10.29121/ijesrt.v9.i7.2020.1 ◽

2020 ◽

Vol 9 (7) ◽

pp. 1-10

Keyword(s):

Cross Section ◽

Progressive Collapse ◽

Plastic Hinge ◽

Beam Theory ◽

Steel Structures ◽

Element Analysis ◽

Modeling And Analysis ◽

Reduced Beam Section ◽

Weak Beam ◽

Beam Section

This study reviews mainly holistic design of PEB structure and comparison of behavior of reduced beam section at beam column sub assemblage. Commercial software based on finite element analysis is used for carrying out mathematical modeling and analysis. In recent construction work it is observed that during conditions like earthquake or cyclone connections fails resulting in to progressive collapse. Also it damages column resulting in failure of strong column weak beam theory. In present work after identifying problem structure is fused at connection by reducing beam cross section at location of connection. This is done by reducing cross section of beam in plan expected to result in shifting of plastic hinge from face of column. Reduced beam sections capacity is calculated by simple calculations and verifying them with moment curvature relationships at desired locations. This will concentrate on failure of fuse and not of connection during load application. Motivation of this study is to improve connection by fulfilling strong column and weak beam theory. This will motivate construction industry to utilize steel structures more often assuring repairing of structure as element failure will be dominant over failure of entire structure

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Seismic Design Method for Hybrid Viaduct in Japanese Railways

IABSE Congress Report ◽

10.2749/222137900796298751 ◽

2000 ◽

Vol 16 (20) ◽

pp. 338-346

Author(s):

Kiyomitsu MURATA ◽

Masato YAMADA ◽

Tomohiro TAKAYAMA ◽

Masanori KINOSHITA

Keyword(s):

Seismic Design ◽

Design Method ◽

Seismic Design Method

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Research Situation on the Performance-Based Seismic Design Method for Reinforced Concrete Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.1757 ◽

2010 ◽

Vol 163-167 ◽

pp. 1757-1761

Author(s):

Yong Le Qi ◽

Xiao Lei Han ◽

Xue Ping Peng ◽

Yu Zhou ◽

Sheng Yi Lin

Keyword(s):

Reinforced Concrete ◽

Seismic Design ◽

Design Method ◽

Concrete Structures ◽

Reinforced Concrete Structures ◽

Seismic Evaluation ◽

Seismic Codes ◽

Performance Based Seismic Design ◽

Capacity Calculation ◽

Seismic Design Method

Various analytical approaches to performance-based seismic design are in development. Based on the current Chinese seismic codes，elastic capacity calculation under frequent earthquake and ductile details of seismic design shall be performed for whether seismic design of new buildings or seismic evaluation of existing buildings to satisfy the seismic fortification criterion “no damage under frequent earthquake, repairable under fortification earthquake, no collapse under severe earthquake”. However, for some special buildings which dissatisfy with the requirements of current building codes, elastic capacity calculation under frequent earthquake is obviously not enough. In this paper, the advanced performance-based seismic theory is introduced to solve the problems of seismic evaluation and strengthening for existing reinforced concrete structures, in which story drift ratio and deformation of components are used as performance targets. By combining the features of Chinese seismic codes, a set of performance-based seismic design method is established for reinforced concrete structures. Different calculation methods relevant to different seismic fortification criterions are adopted in the proposed method, which solve the problems of seismic evaluation for reinforced concrete structures.

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