Experimental and numerical studies of hysteretic response of triple-truss-confined buckling-restrained braces

Guo, Yan‐Lin; Zhou, Peng; Wang, Meng-Zheng; Pi, Yong‐Lin; Bradford, Mark A.; Tong, Jing-Zhong

doi:10.1016/j.engstruct.2017.06.058

Cited by 27 publications

(6 citation statements)

References 18 publications

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“…To fulfill the requirement of bulk-size braces required for long-span spatial structures and mega-frame structures, Guo et al [129,130] introduced a triple-truss-confined all-steel BRB. As shown in Figure 18, this novel triple-truss-confined all-steel BRB was fabricated by adding a series of rigid trusses around a conventional all-steel BRB to enhance the overall load-bearing capacity and flexural stiffness of the exterior restraining unit.…”

Section: All-steel Brbsmentioning

confidence: 99%

Advancements and Future Prospects of Buckling Restrained Braces for Corrosive-Environments: A Comprehensive Literature Review

Hussain,

Kim

2023

Buildings

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The seismic design of structures is crucial for preventing structural collapse and safeguarding human lives. Buckling-restrained braces (BRBs) have emerged as effective seismic protection devices due to their high stiffness, strength, and exceptional energy absorption capabilities. Typically, a conventional BRB consists of a steel core surrounded by concrete-filled steel tubes, with a separation mechanism ensuring axial-only deformation of the core. However, researchers have been increasingly focusing on developing innovative BRB designs with enhanced performance, incorporating different materials and configurations. This paper presents a comprehensive analysis of the development of novel BRBs introduced in the past 15 years. A systematic review approach is adopted, and the selected articles are categorized based on the shapes, materials, and compositions of the BRB components. Although carbon steel has been widely used in numerous studies, its susceptibility to corrosion and its potential impact on the hysteretic behavior of BRBs remain unexplored. Consequently, future research prospects are identified, highlighting the significance of employing anti-corrosive materials in fabricating BRBs to ensure their stable seismic performance under harsh environmental conditions. Investigating novel materials and configurations can lead to the creation of more robust and corrosion-resistant BRBs, thus enhancing the safety and longevity of structures in earthquake-prone areas.

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Section: All-steel Brbsmentioning

confidence: 99%

Advancements and Future Prospects of Buckling Restrained Braces for Corrosive-Environments: A Comprehensive Literature Review

Hussain,

Kim

2023

Buildings

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“…The vertical eccentricity E2 is proportional to the angle ϕ, being equivalent to the correction distance d. Figure 8 shows that the measurement of d2 is equal to 5t1 of the pipe wall thickness (flange) Several other collapses in 3D trusses have been observed in the world. However, the ranges of space truss structures have been reevaluated and some have been strengthened in recent years [61][62][63][64][65][66][67][68][69][70], thanks to increasingly robust computer systems and commercial Finite Element Method (FEM) programs and complex nonlinear analyses [10,30,56,[71][72][73][74][75][76][77][78][79][80][81][82].…”

Section: Correction Of Eccentricity In Typical Connectionsmentioning

confidence: 99%

Experimental Analysis of Space Trusses Using Spacers of Concrete with Steel Fiber and Sisal Fiber

Silva

Bezerra

et al. 2020

Materials

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Space trusses are structural systems, generally made of tubes, used worldwide because of their advantages in covering long-span roofs. In addition to having a low cost, the truss weight is relatively reduced. The load capacity of these structures depends also on the strength of their node connection. Connections made with the superposition of flattened tube ends trespassed by one bolt are, generally, known as typical nodes. They are inexpensive but present eccentricities that reduce significantly the strength of such space trusses. To increase the truss load capacity, this research presents the results of an experimental program to reduce the eccentricities of the typical nodes. This reduction is done with a new type of spacer made of encapsulated concrete with steel fiber or sisal fiber. The experimental tests showed that the trusses with typical nodes collapsed under reduced load by local failure due to high distortions at the nodes. The trusses with encapsulated concrete spacer showed good results, with an increase in collapse load of 36% and failure by buckling bars.

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“…The effect of the restraining ratio on the cyclic behavior and failure mechanism was discussed with reference to numerical and experimental studies. 17 In this paper, an evolutionary TC-BRB is proposed to achieve a more robust buckling restraining mechanism and a more attractive architectural appearance for engineering applications involving long-span spatial structures. As shown in Figure 2, the truss confining system can be applied to a mortar-or concrete-filled casing to efficiently prevent possible local buckling failure.…”

Section: Introductionmentioning

confidence: 99%

“…Design implication in mitigating the stress concentration at the end regions of the proposed BRB to prevent unexpected premature failure was provided accordingly. The effect of the restraining ratio on the cyclic behavior and failure mechanism was discussed with reference to numerical and experimental studies 17 …”

Section: Introductionmentioning

confidence: 99%

Experimental behavior of truss‐confined buckling‐restrained braces

Tsai

Chen

et al. 2022

Earthq Engng Struct Dyn

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Buckling‐restrained braces (BRBs) can effectively improve the stiffness, strength, and energy dissipation capacity of building structures. The key feature of the proposed truss‐confined BRB (TC‐BRB) is an additional truss confining system attached outside the central steel casing. The truss system is composed of several steel open‐web truss frames, thereby providing the required restraining rigidity and reducing the central casing section size and infilled mortar. The overall self‐weight is decreased compared with a conventional BRB, especially in cases of long‐span and large force capacity BRB applications. This research program was conducted to investigate the hysteresis behavior of the TC‐BRBs in terms of truss member response, buckling resisting ability, and cumulative deformation capacity. Six one‐third‐scale TC‐BRB specimens, each 6.3 m long and with different yield capacities, truss frame shapes and sizes, were tested using cyclically increasing loads with or without an out‐of‐plane end drift. The six specimens eventually failed either from global flexural buckling of the entire restraining system or a tensile fracture of the steel core at a very large axial strain. The experimental results demonstrated that the TC‐BRBs can be designed and fabricated to have a very stable and highly repeatable hysteretic response, meeting the American Institute of Steel Construction acceptance criteria. It provides a valuable database to support the further development of design guidelines for the engineering application of the proposed TC‐BRBs.

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Experimental and numerical studies of hysteretic response of triple-truss-confined buckling-restrained braces

Cited by 27 publications

References 18 publications

Advancements and Future Prospects of Buckling Restrained Braces for Corrosive-Environments: A Comprehensive Literature Review

Advancements and Future Prospects of Buckling Restrained Braces for Corrosive-Environments: A Comprehensive Literature Review

Experimental Analysis of Space Trusses Using Spacers of Concrete with Steel Fiber and Sisal Fiber

Experimental behavior of truss‐confined buckling‐restrained braces

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