DEFLECTION AMPLIFICATION FACTORS FOR DUCTILE BRACED FRAMES
For most seismic braced frames, strength rather than stiffness governs design. Still, it is important for designers to understand braced frame drift and predict inelastic deformations under severe earthquakes. Often in practice, inelastic drifts are estimated by amplifying the elastic drifts that occur under an equivalent lateral force. In current U.S. provisions, displacement amplification factors are about half of the strength reduction factors. Results from time history analyses of 36 braced frames under a suite of 10 earthquakes are used to investigate the accuracy of current methods to estimate inelastic drifts. Buckling restrained braced frames (BRBFs), special concentric braced frames (SCBFs), and eccentrically braced frames (EBFs) are considered. An alternative method of estimating inelastic drifts is investigated where only the shear components of the elastic drift are amplified.
BRBF Cd DAF Drift EBF SCBF
Brandon K. Thompson Paul W. Richards
Dept. of Civil and Environmental Engineering , Brigham Young University,Provo, UT 84602, USA
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）