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Showing 1 to 20 of 31 for “"braced frames"”.
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Seismic stability of buckling-restrained braced frames
Buckling Restrained Braced Frames (BRBFs) are widely used as a seismic force-resisting system due to their advantageous properties for ductility and energy dissipation. However, because of the modest overstrength and relatively low post-yielding stiffness, BRBFs subjected to seismic loading may be …
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Redundancy in Steel Braced Frames Under Seismic Excitations
… derived and determined for all of the calculated braced frames. The new redundancy factors are compared with the redundancy factors currently required by code. Fragility curves are also calculated for each building. Conclusions are drawn in order to contribute to future structural design.
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Seismic design and performance of multitiered ordinary concentrically braced frames
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Performance Evaluation of Cold -Formed Steel Braced Frames for Seismic Loads
A series of 2-, 4- and 6-story buildings were designed and evaluated using the proposed method. It was found that 4- and 6-story buildings design and configured based on current provisions using an R factor of 4 did not satisfy the design objective. This resulted mainly from excessive drift demands …
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Performance assessment of special concentrically-braced frames in moderate seismic regions
Steel concentrically-braced frames (CBFs) are widely used lateral force resisting systems with high strength, stiffness, and material efficiency. Special concentrically-braced frame (SCBF) systems are a type of CBF commonly used in high seismic regions because they are designed to permit large …
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Effect of Beam Splicing on Seismic Response of Buckling-Restrained Braced Frames
… capacity of typical buckling-restrained braced frames (BRBFs) is limited by the rotation capacity of connecting regions. The rotation capacity of the connection region is limited by fracture of the gusset welds and yielding in the beams and columns. A different connection detail with …
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Assessment of seismic design provisions for multi-tiered ordinary concentrically braced frames
Multi-tiered braced frames (MT-BFs) are commonly used as lateral force resisting systems in tall single-story buildings such as performing arts and sports centers, industrial warehouses, and airplane hangars. Horizontal members (struts) are used to divide the tall single-story into several bracing …
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Beam-column connection flexural behavior and seismic collapse performance of concentrically braced frames
… seismic collapse performance of concentrically braced frames. Previous experimental and field observations demonstrated that reserve lateral force-resisting capacity due to the flexural strength of connections outside the primary lateral force-resisting system of steel frames can maintain …
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Inelastic behavior and seismic collapse prevention performance of low-ductility steel braced frames
… instances nonexistent. Ordinary concentrically-braced frames (OCBFs) have requirements that are intended to provide a small level of ductility, and steel SFRSs designed with a response modification factor R = 3 have no specific seismic requirements. Rather than relying on ductility for …
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Seismic Rehabilitation of Steel Concentrically Braced Frames Vulnerable to Soft-Story Failure Through Implementation of Rocking Cores
… research reports that steel Concentrically Braced Frames (CBFs) (even the code-compliant ones) may be susceptible to soft-story failures during strong earthquakes. Such a failure mode causes catastrophic outcomes and should be definitely avoided in practice. This thesis focuses on …
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Evaluation of Strength Reduction Factor for Concentrically Braced Frames Based on Nonlinear Single Degree-of-Freedom Systems
… a FEM single degree-of-freedom Concentrically Braced Frame (CBF) under incremental dynamic analysis over a suite of ground motions. Parameters of the study include brace slenderness, fundamental frequency, increment resolution, FEM mesh refinement, effects of leaning columns, and effects of …
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Performance of Steel Braced Frame Reinforced with Shape Memory Alloy Wires
… on the research performed on concentrically braced steel frames reinforced with nickel-titanium (NiTi) shape memory alloy (SMA) wires for use as a seismic resistance force system. The main objective of this research was to design an innovative self-centring system that had the ability to …
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Performance-Based Analysis of a Reinforced Concrete Shear Wall Building
… similar studies which used steel special moment frames, special concentric braced frames, and buckling restrained braced frames for their primary lateral systems. The results showcase expected seismic performance levels for a commercial office building designed in a high seismicity region with …
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Cyclic lateral-torsional buckling of short I-beams
… to cyclically reversing loads. The eccentrically braced frame, used in the earthquake resistant design of building structures, provides an application in which lateral buckling of short I-beams under cyclic loading is relevant. Our main purpose is to establish some benchmarks with which to assess …
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The Seismic Behavior of Steel Structures with Semi-Rigid Diaphragms
… and (2) horizontal configurations of vertical braced frames were designed and their performance evaluated through both nonlinear static and dynamic analyses. Comparisons of the analytical results between the structures with and without rigid diaphragm constraints indicate that the in-plane …
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Improvement of inelastic performance for friction damped asymmetric buildings
… on the performance of friction damped braced frames, in an effort to improve the efficiency of friction damped braced frames in single and multi-storey buildings. Firstly, multi-storey models having stiffness ratio (brace stiffness to frame stiffness) of three and strength ratio (brace …
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Parametric analysis of progressive collapse in high-rise buildings
… commonly used for high-rise buildings: moment frames, braced frames and truss tube systems. A variety of 2D structural models are analysed for their performance under progressive collapse conditions with variable building parameters. The results of the investigation infer that taller buildings …
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Study of seismic control systems on the behaviour of industrial storage racks
… two different frame systems: moment resisting frames in down aisle direction and braced frames in cross aisle direction. The design of racks is different from typical buildings because they are made of slender thin walled members, hence, making them sensitive to global, local, and distortional …
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Evaluation of structural systems for mass timber buildings in low to moderate seismic regions
… conventional concrete cores with mass timber braced frames and steel-timber hybrid frames. The lateral resistance of prototype configurations is evaluated through numerical analyses to understand in more detail the characteristics of an efficient mass timber lateral system. Finding an optimal …
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Computational Investigation of Tunable Steel Plate Shear Walls for Improved Seismic Resistance
… inelastic deformation capacity as compared to braced frames. The principle behind current SPSW design is that the post-buckling tension field capacity of the thin web plate is proportioned to resist the full lateral load. The resulting web plate is typically quite thin, buckles at low loads, …
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