Erratum for “Experimental and Numerical Evaluation of Older Chevron Concentrically Braced Frames with Hollow and Concrete-Filled Braces” by Barbara G. Simpson and Stephen A. Mahin

Simpson, Barbara; Mahin, Stephen A.

doi:10.1061/(asce)st.1943-541x.0002525

Cited by 2 publications

(9 citation statements)

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“…As mentioned earlier, the type of the nonlinear analysis could affect the force redistribution and, consequently, changes the type and location of the damage modes. [ 47 ] Therefore, to fully investigate the effect of nonlinear analysis type on the damage mode, both static and dynamic nonlinear analyses were included in this study. In this regard, the drift ratio of each story of the 15‐story frames for both static and dynamic nonlinear analyses was determined as shown in Figure 11.…”

Section: Numerical Simulation and Resultsmentioning

confidence: 99%

Enhancing the seismic performance of building structures equipped with composite braces in mega bracing configuration

Atashfaraz

Jangara

Katebi

2022

Structural Design Tall Build

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Summary In this research, a new passive vibration control system for building structures is presented. The proposed system improves the seismic performance of non‐moment steel structures using the ultra‐high‐performance concrete‐filled steel tube (UHPCFT) braces. In this system, pre‐tensioned tendons are considered to equalize the tensile and compressive capacity of the brace members which are installed as large scale concentrically braced frames (CBFs) (i.e., mega bracing frames [MBFs]) in order to minimize the induced forces in the other structural elements (i.e., beams, columns and slabs). To investigate the feasibility of the proposed system, three 8‐, 12‐, and 15‐story structures are considered. Also, buckling restrained braced frames (BRBFs) and normal concrete filled steel tube (NCFT) braces are considered for the comparison purposes. Furthermore, the effectiveness of the proposed technique is evaluated considering the performance point values and fragility assessment results calculated using a near‐field pulse‐like earthquake record set. Comparison of the simulation results demonstrates that, for all the considered earthquake records, the proposed system remarkably attenuates the structural demand value and collapse probability for all the considered structures. Also, it has demonstrated that type of the nonlinear analysis affects the damage mode.

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Section: Numerical Simulation and Resultsmentioning

confidence: 99%

Enhancing the seismic performance of building structures equipped with composite braces in mega bracing configuration

Atashfaraz

Jangara

Katebi

2022

Structural Design Tall Build

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“…It should be noted that in the tests oriented in the horizontal direction, applying gravity loads to columns is difficult. Additionally, Simpson and Mahin [ 22 ] and Lia and Mahin [ 20 ] experimentally investigated full‐scale two‐story, one‐bay braced frames oriented in the vertical direction. In their studies, no gravity loads were applied to the columns.…”

Section: Experimental Programmentioning

confidence: 99%

“…In their studies, no gravity loads were applied to the columns. Simpson and Mahin [ 22 ] and Lia and Mahin [ 20 ] indicated that the gravity loads contribute as minor in the total axial load applied to the columns, and thus, the gravity loads can be ignored in the experimental studies. Therefore, no gravity loads were considered in this research.…”

Section: Experimental Programmentioning

confidence: 99%

“…In their study, local buckling and plastic hinge were observed at the column bases. Simpson and Mahin [ 22 ] experimentally investigated the behavior of two‐story one‐bay chevron‐configuration SCBFs with square‐HSS and square‐CFT braces. In their study, beam–column shear tab connections were used.…”

Section: Experimental Observationsmentioning

confidence: 99%

“…In addition, decreasing the local buckling severity, changing the local buckling mode, and improving the ductility and energy dissipation capacity resulted from the presence of concrete infill. Simpson and Mahin [ 22 ] carried out a series of experimental and numerical studies to investigate the cyclic behavior of a nearly full‐scale older chevron concentrically braced frame with square‐HSS braces designed in accordance with AISC 1978. [ 23 ] In order to investigate the effect of concrete infill presence in HSS braces, HSS braces were filled with concrete and then retested.…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of composite and non‐composite columns and braces in special concentrically braced frames

Ebrahimi

Mirghaderi

Zahrai

2022

Structural Design Tall Build

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Hollow structural section (HSS) and concrete-filled tube (CFT) cross-sections have been widely employed in the columns and braces of special concentrically braced frames (SCBFs). Square-HSS cross-section widely used in multistory frames is filled with concrete and converted to square-CFT cross-section to enhance the behavior of this cross-section. However, some investigations indicated that circular-HSS cross-section filled with concrete (circular-CFT) showed better behavior in comparison with square-CFT cross-section due to more uniform and larger concrete confinement in circular-CFT cross-section. The current study was experimentally undertaken to evaluate (1) the seismic performance and the global and local hysteresis responses of HSS and CFT members with various cross-section shapes from initial elastic range to collapse in the system level of multistory SCBFs, (2) the behavioral differences between square cross-section and circular cross-section, and (3) the behavioral differences between HSS cross-sections and CFT cross-sections employed in the columns and braces of SCBFs. Four full-scale one-bay, two-story SCBFs with four various cross-sections, namely, square-HSS, circular-HSS, square-CFT, and circular-CFT, for columns and braces were subjected to cyclic lateral loading. Evaluating base shearroof drift hysteretic loops of SCBF specimens demonstrated that SCBF specimens with CFT columns and braces (CFT-SCBFs) experienced respectively around 107%, 58%, 28%, and 152% higher stiffness, post-yielding and post-buckling strengths, ductility, and energy dissipation capacity than SCBF specimens with HSS columns and braces (HSS-SCBF). In addition, the experimental observations indicated that CFT braces experienced local buckling initiation, crack initiation, and fracture at respectively 2.22, 2.35, and 2.32 times of roof drifts of those exhibited by HSS braces.Moreover, assessing braces with various cross-sections indicated that CFT braces showed an increase in compression strength, post-buckling strength, compression axial deformation, and out-of-plane buckling approximately by 83%, 152%, 127%, and 100%, respectively, in comparison with HSS braces. Finally, square-HSS/CFT braces sustained rupture propagation better than circular-HSS/CFT braces.

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Erratum for “Experimental and Numerical Evaluation of Older Chevron Concentrically Braced Frames with Hollow and Concrete-Filled Braces” by Barbara G. Simpson and Stephen A. Mahin

Cited by 2 publications

References 0 publications

Enhancing the seismic performance of building structures equipped with composite braces in mega bracing configuration

Enhancing the seismic performance of building structures equipped with composite braces in mega bracing configuration

Experimental evaluation of composite and non‐composite columns and braces in special concentrically braced frames

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