000009694 001__ 9694
000009694 005__ 20141205153145.0
000009694 04107 $$aeng
000009694 046__ $$k2008-10-12
000009694 100__ $$aChen, Houqun
000009694 24500 $$aRecent Progresses in Seismic Study on High Arch Dam in China

000009694 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009694 260__ $$b
000009694 506__ $$arestricted
000009694 520__ $$2eng$$aIn this paper some recent research progresses achieved by the team supported by Chinese National Science Foundation including seismic input, structural responses and dynamic resistance as the mutually coordinated factors necessary for seismic safety assessment for high arch dams are briefly introduced. For seismic input, a new method of generating artificial accelerogram non-stationary both in amplitude and frequency and a more reasonable “finite fault method” to assess the Maximum Credible Earthquake (MCE) deterministically for dam site near the causative fault are stressed. For structural responses, an improved analysis of arch dams simultaneously considering all the factors such as: dynamic interaction of dam-foundation-reservoir, radiation damping of energy dispersion in far-field foundation, topography features and geological disturbances including all potential sliding blocks of arch dam abutments at both banks within the near-field foundation adjacent to dam, opening and slipping of contraction joints within dam and along the abutment sliding surfaces and dam base periphery during strong earthquake, and spatial variation of seismic input along dam foundation is developed. Also, a new conception from the break point of displacement responses of the integral dam-foundation-reservoir system under seismic action as the quantitative criterion for evaluating arch dam breach is suggested. For dynamic resistance of dam concrete, the effects of static preloads on the dynamic behavior of fully-graded dam concrete are investigated by testing, and the results are explained by the three-dimensional meso-mechanics analysis of the concrete specimen with real mix proportion. The dynamic failure mechanism revealed by the analysis was also observed by the X-ray computed topography (CT) technique. Finally, the high-performance parallel computation technique was successfully used in all these analyses.

000009694 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009694 653__ $$ahigh arch dam, seismic input, response analysis, dynamic behavior of dam concrete, parallel computation

000009694 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009694 720__ $$aChen, Houqun$$iMa, Huaifa$$iZhang, Cuiran$$iWu, Shengxing$$iDang, Faning$$iDing, Weihua
000009694 8560_ $$ffischerc@itam.cas.cz
000009694 8564_ $$s366977$$uhttps://invenio.itam.cas.cz/record/9694/files/S13-002.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S13-002.
000009694 962__ $$r9324
000009694 980__ $$aPAPER