000018906 001__ 18906
000018906 005__ 20170118182247.0
000018906 04107 $$aeng
000018906 046__ $$k2017-01-09
000018906 100__ $$aLi, Dongsheng
000018906 24500 $$aNew Method To Obtain Ground Velocity and Displacement From Strong Motion Accelerogram Based on Zero Initial Condition

000018906 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018906 260__ $$b
000018906 506__ $$arestricted
000018906 520__ $$2eng$$a The displacement and velocity at certain points of a structure is very important in the field of earthquake engineering, structural vibration control and structural health monitoring. However, acceleration is much easily measured than displacement and velocity in experiments. It is, therefore, necessary to integrate acceleration to get velocity and displacement. However, the absence of initial conditions often renders the integration process affected by significant “drift” errors. To attack this problem, a novel integration method is proposed, by which the zero points of velocity and displacement during steady state vibration are sought for and determined by the rule of the conservation of energy. Furthermore, the “drift” caused by the error of sampling spacing and stochastic vibration is removed by detrending the integrated displacement. The proposed method is applied to two recent seismic motion records. The integrated velocity and displacement are compared with known ones, and it shows that the maximum relative error at extremes are less than 2%, which powerfully demonstrates that the proposed integration method is accurate and practical.

000018906 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018906 653__ $$aacceleration integration; reconstruction of velocity; reconstruction of displacement; time-domain integration; zero initial integration

000018906 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018906 720__ $$aLi, Dongsheng
000018906 8560_ $$ffischerc@itam.cas.cz
000018906 8564_ $$s461126$$uhttps://invenio.itam.cas.cz/record/18906/files/245.pdf$$yOriginal version of the author's contribution as presented on USB, paper 245.
000018906 962__ $$r16048
000018906 980__ $$aPAPER