000019095 001__ 19095
000019095 005__ 20170118182259.0
000019095 04107 $$aeng
000019095 046__ $$k2017-01-09
000019095 100__ $$aBuckle, Ian
000019095 24500 $$aReinforced Concrete Bridge Columns Tested Under Long and Short Duration Ground Motions

000019095 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019095 260__ $$b
000019095 506__ $$arestricted
000019095 520__ $$2eng$$aRecent earthquakes in Indonesia (2004), Chile (2010), and Japan (2011) are reminders of the possible occurrence of a longduration, large-magnitude earthquake in the Cascadia subduction zone along the Pacific Northwest Coast of the United States. The importance of studying the effect of ground motion duration on structural performance has been highlighted by these earthquakes. Current seismic design specifications do not consider this effect. Conclusions from previous research with regard to duration have been conflicting. This paper describes a comprehensive experimental study to investigate the effect of duration on reinforced concrete (RC) bridge columns. The results of shake table tests of three identical large-scale RC bridge columns are discussed. The columns were tested using spectrally equivalent long and short-duration ground motions. A cumulative damage metric is used to define columns damage states. This metric was correlated against damage states obtained from published data on more than 25 bridge columns that had been tested to failure. The results showed that the columns subjected to long-duration motions were more highly damaged than those with short-duration motions. The reinforcing steel in the columns subjected to longer motions had a significantly larger number of plastic strain cycles, which caused the bars to fracture at lower displacements compared to the columns subjected to short-duration motions; i.e. ground motion duration affected the collapse capacity of these columns. Therefore, it is recommended that duration effects be considered in the seismic design of bridges, especially in regions where long-duration earthquakes may occur.

000019095 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019095 653__ $$aground motion duration; shake table experiments; bridge columns; reinforced concrete

000019095 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019095 720__ $$aBuckle, Ian$$iSanders, David$$iMohammed, Mohammed
000019095 8560_ $$ffischerc@itam.cas.cz
000019095 8564_ $$s1062535$$uhttps://invenio.itam.cas.cz/record/19095/files/2831.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2831.
000019095 962__ $$r16048
000019095 980__ $$aPAPER