CORRELATION OF DEFORMATION DEMANDS WITH GROUND MOTION INTENSITY IN NEAR-FIELD MOTIONS
A comprehensive study has been carried out to demonstrate the correlation between maximum interstory drift demand of the frame structures and a number of widely used near-field motion records (NFR). Nonlinear time-history analyses of 6 reinforced concrete (RC) frames are operated under a set of 117 NFR. These frames should be selected to represent features of typical low-; middle- and highwise RC frame structures. The NFR are different from the others inherently. The effects such as forward-rupture; fling step and etc,are paid special attention when the structural demands are being evaluated. The records contained in the ground motion database are complied with the intention of representing a wide range of seismic forces that would excite various elastic modes and the inelastic response of the frames. The maximum interstory drift ratios computed are compared with the ground motion intensity parameters employed and correlations between them are investigated through coefficients of correlation and determination. The results reveal that spectrum intensity parameters,having the strongest correlation,are superior to other parameters such as peak ground velocity,peak ground acceleration,and spectral acceleration,which we propose would be more suitable for predicting seismic demands of the frames when it dealt with the records derived from nearfield ground motions.
Near-field motions Maximum interstory drift ratio Ground motion intensity parameter Correlation analyses Nonlinear analyses Frame structures
Wei-Jian Yi Hai-Ming Zhang
Civil & Environment Engineering Depart.,Hunan University,Changsha 410082,P.R.China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
228-233
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）