000012179 001__ 12179
000012179 005__ 20141205160027.0
000012179 04107 $$aeng
000012179 046__ $$k2008-10-12
000012179 100__ $$aYang, Dixiong
000012179 24500 $$aIntensity Measure Parameters and Characteristic Period of Near-Fault Strong Ground Motions

000012179 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000012179 260__ $$b
000012179 506__ $$arestricted
000012179 520__ $$2eng$$aThis paper focuses on the effects of velocity pulse of near-fault ground motions on the structural damage potential. Two sets of near-fault ground motion records from Chi-Chi, Taiwan earthquake and Northridge earthquake with and without velocity pulse are selected as the input, and correlation analysis between 30 intensity measure parameters and maximum inelastic displacements and energy responses (input energy and hysteretic energy) of bilinear single degree of freedom (SDOF) systems are conducted. Based on the frequency characteristic of near-fault ground motions with remarkable long-period components, two intensity indices are proposed, which are the improved effective peak acceleration (IEPA) and improved effective peak velocity (IEPV). And a new characteristic period of these ground motions is defined based on IEPA and IEPV. Numerical results illustrate that the intensity measure parameters related to ground acceleration present the best correlation with the seismic responses for the rigid systems; the velocity-related and displacement-related parameters are better for medium- frequency systems and flexible systems respectively. The correlation curves of near-fault ground motions with velocity pulse differ from those of ground motions without pulse. Moreover, the improved parameters IEPA and IEPV of near-fault impulsive ground motions enhance the performance of intensity measure of corresponding conventional parameters, i.e., EPA and EPV. The new characteristic period based on IEPA and IEPV can better reflect the frequency content of the near-fault ground motions.

000012179 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012179 653__ $$anear-fault ground motions, velocity pulse, intensity measure parameters, characteristic period, bilinear SDOF systems, correlation analysis

000012179 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000012179 720__ $$aYang, Dixiong$$iPan, Jianwei$$iLi, Gang
000012179 8560_ $$ffischerc@itam.cas.cz
000012179 8564_ $$s328947$$uhttps://invenio.itam.cas.cz/record/12179/files/S10-007.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S10-007.
000012179 962__ $$r9324
000012179 980__ $$aPAPER