000018579 001__ 18579
000018579 005__ 20170118182229.0
000018579 04107 $$aeng
000018579 046__ $$k2017-01-09
000018579 100__ $$aHao, Hong
000018579 24500 $$aCyclic Tests of Precast Segmental Concrete Columns With Unbonded Post-Tensioned Tendons

000018579 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018579 260__ $$b
000018579 506__ $$arestricted
000018579 520__ $$2eng$$aPrecast segmental concrete column has been used in building and bridge constructions due to its numerous advantages, including accelerated construction speed, less construction site disruption, better construction quality control and less environmental impacts. Its applications are, however, still limited because knowledge about its performance under seismic loading is not enough. Many tests have been reported, but usually on different designs. Also, previous studies focused on testing cantilever-type precast segmental columns, i.e., with only the bottom end of the column fixed. This paper presents a comparative study through testing one monolithic RC column used as the reference, and four segmental columns with different designs to systematically study the influences of 1) placement of energy dissipation (ED) bars; 2) shear keys; and 3) number of segments, on the performance of the segmental columns subjected to cyclic loadings. To be different from the boundary condition of previous studies, rotational freedom of the top end of the columns is restrained in this study. The performance of each design with respect to the reference monolithic RC column in terms of the lateral strength capacity, hysteretic behavior and energy absorption capacity is examined. It was found that adding ED bars could increase the energy dissipation of the segmental column, but lead to larger residual deformation. Concrete shear keys were able to prevent the slip between the segments, but severe damage could occur due to stress concentration surrounding the shear keys. The number of segments had insignificant influence on the performance of segmental column. Further study will be carried out to improve the identified shortcomings so as to derive better performing segmental columns for practical applications in constructions in seismic regions.

000018579 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018579 653__ $$aprecast segmental column; cyclic test; seismic performance; tendons

000018579 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018579 720__ $$aHao, Hong$$iZhang, Xihong$$iLi, Chao
000018579 8560_ $$ffischerc@itam.cas.cz
000018579 8564_ $$s527511$$uhttps://invenio.itam.cas.cz/record/18579/files/1747.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1747.
000018579 962__ $$r16048
000018579 980__ $$aPAPER