Journal ArticleDOI
Experimental Evaluation of a Large-Scale Buckling-Restrained Braced Frame
Larry A. Fahnestock,Larry A. Fahnestock,James M. Ricles,James M. Ricles,Richard Sause,Richard Sause +5 more
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TLDR
In this article, a large-scale BRBF with improved connection details was tested at the ATLSS Center, Lehigh University, which demonstrated that a properly detailed BRBF can withstand severe seismic input and maintain its full load-carrying capacity.Abstract:
As buckling-restrained braced frames (BRBFs) have been used increasingly in the United States, the need for knowledge about BRBF behavior has grown. In particular, large-scale experimental evaluations of BRBFs are necessary to demonstrate the seismic performance of the system. Although tests of buckling-restrained braces (BRBs) have demonstrated their ability to withstand significant ductility demands, large-scale BRBF tests have exhibited poor performance at story drifts between 0.02 and 0.025 rad. These tests indicate that the large stiffness of the typical beam-column-brace connection detail leads to large flexural demands that cause undesirable failure modes. As part of a research program composed of numerical and experimental simulations, a large-scale BRBF with improved connection details was tested at the ATLSS Center, Lehigh University. During multiple earthquake simulations, which were conducted using a hybrid pseudodynamic testing method, the test frame sustained story drifts of close to 0.05 rad and BRB maximum ductility demands of over 25 with minimal damage and no stiffness or strength degradation. The testing program demonstrated that a properly detailed BRBF can withstand severe seismic input and maintain its full load-carrying capacity.read more
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Journal ArticleDOI
Development and experimental validation of a nickel–titanium shape memory alloy self-centering buckling-restrained brace
TL;DR: In this paper, a self-centering buckling-restrained brace (SC-BRB) is proposed to dissipate energy, minimize structural damage, and return to their initial position following an earthquake.
Journal ArticleDOI
Residual Drift Response of SMRFs and BRB Frames in Steel Buildings Designed according to ASCE 7-05
TL;DR: In this article, the authors investigated the residual drift response of special moment-resisting frames (SMRFs) and buckling-restrained braced (BRB) frames, which are designed according to ASCE 7-05 and investigated numerically.
Journal ArticleDOI
Shake table test and numerical study of self‐centering steel frame with SMA braces
TL;DR: In this paper, the authors presented experimental and numerical studies on a scaled self-centering steel frame with novel SMA braces (SMAB), which utilize superelastic Ni-Ti wires.
Journal ArticleDOI
Performance-based seismic design of self-centering steel frames with SMA-based braces
TL;DR: In this article, a performance-based seismic design (PBSD) method was proposed for steel braced frames with novel self-centering (SC) braces that utilize shape memory alloys (SMA) as a kernel component.
Journal ArticleDOI
A novel type of angle steel buckling‐restrained brace: Cyclic behavior and failure mechanism
TL;DR: In this paper, a buckling-restrained brace (ABRB) was developed for easier control on initial geometric imperfection in the core, more design flexibility in the buckling restraining mechanism and easier assembly work.
References
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BookDOI
Minimum Design Loads for Buildings and Other Structures
TL;DR: Minimum Design Loads for Buildings and Other Structures as mentioned in this paper gives the latest consensus requirements for dead, live, soil, flood, wind, snow, rain, ice, and earthquake loads.
Journal ArticleDOI
The 1997 NEHRP Recommended Provisions for Seismic Regulations for New Buildings and Other Structures
TL;DR: In this article, the NEHRP Recommended Provisions for Seismic Regulations for New Buildings and Other Structures from the development of ATC 3-06 to the 1997 edition of the docum...
Journal ArticleDOI
Pseudodynamic Method for Seismic Testing
TL;DR: The pseudodynamic method as discussed by the authors is a relatively new experimental technique for evaluating the seismic performance of structural models in a laboratory by means of on-line computer controlled testing, during such a test, the displacement response of a structure to a specified dynamic excitation is numerically computed and quasi-statically imposed on the structure, based on analytically prescribed inertia and viscous damping characteristics for the structure and the experimentally measured structural restoring forces.