Composite behavior in RC buildings retrofitted using buckling-restrained braces with elastic steel frames

Saingam, Panumas; Sütçü, Fatih; Terazawa, Yuki; Fujishita, Kazuhiro; Lin, Po-Chuan; Celik, Oguz C.; Takeuchi, Tōru

doi:10.1016/j.engstruct.2020.110896

Cited by 30 publications

(14 citation statements)

References 41 publications

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“…Saberi et al (2020) studied the cooperation of steel and concrete in composite columns. Saingam et al (2020) dealt with a seismically retrofitting Reinforced Concrete (RC) building with a combination of Buckling-Restrained Braces (BRBs) and elastic steel frames that provided additional lateral stiffness and energy dissipation capacity. Terazawa et al (2020) dealt with a grid-purlin system composed of RHS members known to be effective to prevent buckling of the welded beams.…”

Section: Review Of the Literaturementioning

confidence: 99%

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Murawski¹

2021

International Journal of Structural Glass and Advanced Material

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The paper presents the comparison of experimental results obtained from tests on semi-slender columns with pinned ends made of steel R35 to simplifications and hypotheses of loss of stability by lateral buckling in elastic-plastic states of columns axially compressed by force. The Tetmajer-Jasiński's and Johnson-Ostenfeld's simplifications, as well as the hypotheses given by Engesser and Kármán and Shanley, Ylinen, Březina, Pearson and Bleich and Vol'mir and the author's one approximated, are analyzed. The graphs of surface functions of critical compressive stress cr(A, L*t) depending on a cross-section area and length times thickness product are presented as the theoretical examples of thin-walled cylindrical and square columns made of steel R35. In order to compare the experimental results with other simplifications and hypotheses are shown in the adequate ranges for elastic-plastic states as the graphs of the functions of critical compressive stress depending on slenderness ratio cr().

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Section: Review Of the Literaturementioning

confidence: 99%

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Murawski¹

2021

International Journal of Structural Glass and Advanced Material

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“…Saberi et al (2020) studied the cooperation of steel and concrete in composite columns. Saingam et al (2020) dealt with composite behavior in buildings retrofitted using buckling-restrained braces with elastic steel frames. Zucco et al (2020) tested a 750×640×240 mm variable-stiffness unitized integrated-stiffener out-ofautoclave thermoplastic composite wing-box for a combined shear-bending-torsion induced buckling load.…”

Section: Literature Reviewmentioning

confidence: 99%

Stability, Stress and Strain Analysis of Very Slender Pinned Thin-Walled Box Columns according to FEM, Euler and TSTh

Murawski¹,

Wahrhaftig²

2021

American Journal of Engineering and Applied Sciences

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In this study, a Finite Element Method (FEM) analysis is presented for the loss of stability in elastic states of very slender pinned without friction box-section thin-walled column axially compressed. From the FEM buckling linear stress analyses are determined the compressing critical forces for 36 cases, presented in tables and as the surface functions in dependence on the slenderness ratio and cross-section. Also are presented graphs obtained from the FEM post-buckling linear stress analysis for the elastic central line, slope, deflection and states of the stresses and strains of the box-section column 202812500 mm made of steel, by the assumption that a maximal deflection equals the half of a side dimension. The obtained from the FEM computing function and surface graphs are compared and then discussed with graphs corresponding to Euler's and Technical Stability Theory (TSTh) results. Finally are compared graphs of the stresses and strains of box-section thin-walled column 202812500 obtained from FEM and TSTh, but under compressing critical force determined according to TSTh.

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“…For example, the Federal Emergency Management Agency (FEMA) provides guidelines for retrofitting structures by adding additional bracing in the existing structures [43]. Furthermore, curved dampers (CDs) and fluid viscous dampers (FVDs) are installed in building structures to enhance initial stiffness (Figure 1a,b) [44,45]. In addition, some specially made braces such as the buckling-restrained brace (BRB) allow the structural system to have a better seismic-bearing ability (Figure 1c), as stiffness is improved [46].…”

Section: Introductionmentioning

confidence: 99%

Stiffness Modification-Based Bayesian Finite Element Model Updating to Solve Coupling Effect of Structural Parameters: Formulations

Zeng

Kim

2021

Applied Sciences

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The Bayesian model updating approach (BMUA) benefits from identifying the most probable values of structural parameters and providing uncertainty quantification. However, the traditional BMUA is often used to update stiffness only with the assumption of well-known mass, which allows unidentifiable cases induced by the coupling effect of mass and stiffness to be circumvented and may not be optimal for structures experiencing damages in both mass and stiffness. In this paper, the new BMUA tailored to estimating both mass and stiffness is presented by using two measurement states (original and modified systems). A new eigenequation with a stiffness-modified system is formulated to address the coupling effect of mass and stiffness. The posterior function is treated using an asymptotic approximation method, giving the new objective functions with stiffness modification. Analytical formulations of modal parameters and structural parameters are then derived by a linear optimization method. In addition, the covariance matrix of uncertain parameters is determined by the inverse of the Hessian matrix of the objective function. The performance of the proposed BMUA is evaluated through two numerical examples in this study; a probabilistic damage estimation is also implemented. The results show the proposed BMUA is superior to the traditional one in mass and stiffness updating.

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Composite behavior in RC buildings retrofitted using buckling-restrained braces with elastic steel frames

Cited by 30 publications

References 41 publications

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Experimental Comparison of the Known Hypotheses of the Lateral Buckling for Semi-Slender Pinned Columns

Stability, Stress and Strain Analysis of Very Slender Pinned Thin-Walled Box Columns according to FEM, Euler and TSTh

Stiffness Modification-Based Bayesian Finite Element Model Updating to Solve Coupling Effect of Structural Parameters: Formulations

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