Thermal and structural response of two-storey two-bay composite steel frames under furnace loading

2009 ◽  
Vol 44 (4) ◽  
pp. 439-450 ◽  
Author(s):  
Y.L. Dong ◽  
E.C. Zhu ◽  
K. Prasad
Keyword(s):  
Steel Frames ◽  
Structural Response ◽  
Composite Steel

Force-displacement relationship modelling of masonry infilled walls with openings in hinged steel frames

2021 ◽  
Author(s):  
Haoran Zuo ◽  
Weiping Zhang ◽  
Baotong Wang ◽  
Xianglin Gu
Keyword(s):  
Three Dimensional ◽  
Steel Frames ◽  
Structural Response ◽  
Displacement Curve ◽  
Initial Stiffness ◽  
Seismic Behaviour ◽  
Infilled Frames ◽  
Aspect Ratios ◽  
Three Dimensional Finite Element ◽  
Force Displacement

Abstract Seismic behaviour of masonry infilled frames has attracted extensive attentions from researchers, and it was found that infills normally experienced a diagonal compression under lateral loading. Infill was therefore assumed as an equivalent diagonal strut in structural response estimations of infilled frames, and a force-displacement curve was adopted to describe the mechanical properties of the strut. However, the influences of infill aspect ratio, vertical load acting on the surrounding frames, and opening were not systematically addressed in establishing the force-displacement relationship of infills. To investigate the effects of these influential parameters on the lateral responses of infilled walls including initial stiffness and strength, detailed three-dimensional finite element (FE) models of masonry infilled hinged steel frames are developed in ABAQUS in the present study, and a wide parametric study with respect to various aspect ratios, vertical loads, and opening sizes and locations is performed. A generalized force-displacement relationship model of infilled walls is proposed based on regression analyses of numerical results. The efficacy of the proposed model is examined by using the existing experimental test results, and it shows that the model can accurately predict the lateral stiffness and load carrying capacity of infilled walls and thus has great potential applications in structural designs and analyses for masonry infilled steel frames.

Structural response and resilience of posttensioned steel frames under column loss

2019 ◽  
Vol 158 ◽  
pp. 107-119 ◽  
Author(s):  
Yan Fei Zhu ◽  
Chang Hong Chen ◽  
Leon M. Keer ◽  
Ying Huang ◽  
Yao Yao
Keyword(s):  
Steel Frames ◽  
Structural Response

scholarly journals Evaluation of structural response of composite steel-concrete eccentrically buckling-restrained braced frames

2020 ◽  
Vol 18 (4) ◽  
pp. 591-600
Author(s):  
Alireza Bahrami ◽  
Mahmood Heidari
Keyword(s):  
Structural Response ◽  
Shear Capacity ◽  
Braced Frames ◽  
Base Shear ◽  
Fe Modelling ◽  
Shear Link ◽  
Earthquake Records ◽  
Modelling Method ◽  
Buckling Restrained Braced Frames ◽  
Composite Steel

The main purpose of this paper is to evaluate the structural response of composite steel-concrete eccentrically buckling-restrained braced frames (BRBFs). The finite element (FE) software ABAQUS is employed to nonlinearly analyse the BRBFs. Comparing the modelling and experimental test results validates the FE modelling method of the BRBF. Three different strong earthquake records of Tabas, Northridge, and Chi-Chi are selected for the nonlinear dynamic analyses. A BRBF is then designed having a shear link. Afterwards, the designed BRBF is analysed under the selected earthquake records using the validated modelling method. The lateral displacements, base shears, and energy dissipations of the frame and shear link rotations are achieved from the analyses of the BRBF. The results are compared and discussed. The obtained BRBF results are also compared with their corresponding steel eccentrically braced frame (EBF) results. It is concluded that the BRBF can generally accomplish the improved structural response compared with the EBF under the earthquake records. Meanwhile, the BRBF has larger base shear capacity than the EBF. Moreover, the BRBF dissipates more energy than the EBF.

scholarly journals Steel Frames Exposed to Severe Ground Motions: Use of Viscous Dampers and Buckling Restrained Braces to Dissipate Earthquake Induced Energy

2021 ◽  
Author(s):  
Osman Hansu ◽  
Esra Mete Guneyisi
Keyword(s):  
Steel Frames ◽  
Structural Response ◽  
Time History ◽  
Base Shear ◽  
Viscous Dampers ◽  
Finite Element Program ◽  
Buckling Restrained Braces ◽  
Interstorey Drift ◽  
Element Program ◽  
Nonlinear Time History

This study addresses an alternative use of viscous dampers (VDs) associated with buckling restrained braces (BRBs) as the innovative seismic protection devices. For this, 4, 8 and 12 storey steel frames were designed with 6.5 m equal span length and 4 m storey height. Thereafter, the VDs and BRBs were placed over the height of each frame considering three different configurations. The structures were modeled using SAP2000 finite element program and evaluated by the nonlinear time history analyses subjected to the six natural accelerograms (1976 Gazlı, 1978 Tabas, 1987 Superstition Hills, 1992 Cape Mendocino, 1994 Northridge and 1999 Chi-Chi). The structural response of the structures with and without VDs and BRBs were studied in terms of variation in the displacement, interstorey drift, absolute acceleration, maximum base shear, time history of roof displacement. The results clearly indicated that the application of VDs and BRBs had remarkable improvement in the earthquake performance of the case study frames by reducing the local/global deformations in the main structural systems and satisfied the serviceability.

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