Low-Cycle Fatigue Testing of Shear Links and Calibration of a Damage Law

Bozkurt, Mehmet Baklr
Kazemzadeh Azad, Sina
Topkaya, Cem
This paper experimentally studies the low-cycle fatigue (LCF) behavior of shear links in eccentrically braced frames (EBFs) with the aim of calibrating a convenient damage law for estimating the exhausted as well as remaining life of these members under any loading history. A total of 14 specimens are tested using a nearly full-scale EBF setup under constant-amplitude cycles as well as proportional and arbitrary loading histories. A generalized damage law is subsequently calibrated using results of the present study as well as a comprehensive data compilation of previous experiments for predicting the occurrence of link fracture under earthquake-induced loading histories. The approach forms a basis for the development of acceptance criteria based on cumulative measures which can be incorporated into the current performance-based design and evaluation procedures. For further validation, the procedure is applied to the case of EBF links fractured during the Christchurch earthquakes. Finally, the current standards for EBF shear links are discussed based on the findings of the LCF tests.
Journal of Structural Engineering (United States)


Efficient energy dissipating steel-braced frame to resist seismic loads
Dicleli, Murat (American Society of Civil Engineers (ASCE), 2007-07-01)
In this research, the seismic performance of a proposed efficient energy dissipating steel-braced frame (EEDBF) in relation to that of a moment-resisting frame (MRF) and chevron braced frame (CBF) is studied. The frame is intended to combine the advantages of MRF and CBF and eliminate most of the disadvantages pertinent to these frames. Nonlinear static pushover, time history, and damage analyses of the three frames are conducted to assess the performance of the EEDBF compared to that of MRF and CBE The ana...
Performance Examination of Two Seismic Strengthening Procedures by Pseudodynamic Testing
Kurt, Efe Gokce; Kurç, Özgür; Binici, Barış; Canbay, Erdem; Ozcebe, Guney (American Society of Civil Engineers (ASCE), 2012-01-01)
Pseudodynamic testing was employed to observe the seismic performance of two retrofit methods on two-story, three-bay frame structures. The test frames had hollow clay tile (HCT) infill in the central bay and incorporated the seismic deficiencies of Turkish construction practice, such as use of plain reinforcing bars, low-strength concrete, and insufficient confining steel. Two noninvasive and occupant-friendly retrofit schemes suggested in the Turkish Earthquake Code, namely, use of fiber-reinforced polyme...
Correlation of Deformation Demands with Ground Motion Intensity
Yakut, Ahmet (American Society of Civil Engineers (ASCE), 2008-12-01)
A comprehensive study has been carried out to investigate the correlation between maximum interstory drift demand of frame structures and a number of widely used ground motion intensity parameters. Nonlinear time-history analyses of 16 reinforced concrete frames were performed under a set of 80 ground motion records. The frames were selected to represent features of typical low- to mid-rise reinforced concrete structures. The records contained in the ground motion database were compiled from recorded ground...
Mechanical behavior of CFRP confined low strength concretes subjected to simultaneous heating-cooling cycles and sustained loading
Erdil, B.; Akyüz, Uğurhan; Yaman, İsmail Özgür (Springer Science and Business Media LLC, 2012-01-01)
This study aims to present the mechanical behavior of carbon fiber reinforced polymers (CFRP) reinforced low strength cylindrical and prism concrete specimens under both heating-cooling cycles and sustained loading. Heating-cooling cycles range from -10 to 50A degrees C and the applied sustained load level is 40% of the ultimate strength of concrete. After 200 heating-cooling cycles and/or sustained load testing, specimens were tested to determine the mechanical behavior under uniaxial compression. The expe...
Parameters influencing performance of elastomeric bearings at low temperatures
Yakut, Ahmet (American Society of Civil Engineers (ASCE), 2002-08-01)
Experimental research was conducted to investigate the performance of elastomeric bridge bearings at low temperatures. Full-size natural rubber and neoprene bearings were tested by specially designed test setups inside a walk-in-type environmental chamber. Steel laminated bearings were ordered with two specified shear modulus, 0.69 and 1.08 MPa. Tests were conducted at 23, -10, -20, and -30degreesC for a period of 21 days. The effect of cyclic compression, cyclic shear, rate of loading, type of elastomer co...
Citation Formats
M. B. Bozkurt, S. Kazemzadeh Azad, and C. Topkaya, “Low-Cycle Fatigue Testing of Shear Links and Calibration of a Damage Law,” Journal of Structural Engineering (United States), pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36031.