EFFECT OF MOMENTS DUE TO LATERAL DEFORMATION IN GRAVITY COLUMNS
In steel buildings, all columns of a story experience similar drifts under seismic loads when floor diaphragms are rigid. Columns in lateral-force-resisting frames are designed with these deformations in mind, but gravity columns often are not. When gravity columns are continuous, moments develop when interstory drifts occur. Using nonlinear dynamic analysis software, moments due to lateral deformation from seismic forces were obtained for lateral-force-resisting columns within 3- and 9-story buckling-restrained-brace frames (BRBFs). Moments in gravity columns were then determined. Gravity columns were evaluated with interaction equations to determine whether load demands exceeded column capacity. For most gravity columns, column capacity was exceeded. Recommendations for improved gravity column design are given.
Gravity column design lateral deformation moment demand BRBF
Dane E. Huggard Paul W. Richards
Dept. of Civil and Environmental Engineering , Brigham Young University, Utah, 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）