時(shí)間：2015年11月30日 上午10:00
地點(diǎn)：地坤樓409
報(bào)告人：Thomas Kang
主持人：肖巖 教授
題目：Development, Verification and Application of a New Unbonded Post-Tensioned Anchor for the In-situ Building Structures
Thomas Kang,，國立首爾大學(xué)(Seoul National University)建筑與建筑工程學(xué)院副教授。博士畢業(yè)于加利福尼亞大學(xué)洛杉磯分校，并獲得韓國國立首爾大學(xué)與美國密歇根州立大學(xué)(Michigan State University)碩士學(xué)位。曾任美國俄克拉荷馬大學(xué)(University of Oklahoma)土木工程助理教授。已發(fā)表論文著作70余篇，為American Concrete Institute(ACI)和Post-Tensioning Institute(PTI)協(xié)會(huì)會(huì)員。曾獲ACI最有價(jià)值的論文獎(jiǎng)和PTI最有價(jià)值技術(shù)論文獎(jiǎng)。
報(bào)告內(nèi)容簡介：An unbonded post-tensioned (PT) anchor for a 15.2 mm diameter 7-wire strand was developed by Prof. Kang’s research team at Seoul National University based on finite element analysis and experimental verification. As part of the experimental verification of structural performance, static load tests and load transfer tests were conducted following the Korean Specifications, KCI-PS101. The static load tests and additional strand tensile tests confirmed that the developed anchor had a capacity more than nominal tensile strength of a 7-wire strand without any damage or deterioration. According to the result of load transfer tests, specimens with no additional reinforcing bars sustained at least 1.6 times the nominal tensile strength of the strand. This seminar will present such a performance verification process conducted through static load and load transfers tests, as well as the development process. The developed anchors were then used as fixed end anchorage in monolithically cast beam-column joints of special moment frames. Both roof level and inter-story level PT connection subassemblies were tested under reversed cyclic deformations. The test results showed that seismic performance of the connections with developed anchors was excellent in terms of every measurable seismic indicators.