Cyclic Loading Test and Finite ElementAnalysis of Chemically Adhesive Anchors

• Main Authors: Chung-shen Wei, 魏常勝
• Other Authors: Chi-ping Wang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/57241214592788743409

碩士 === 逢甲大學 === 土木工程所 === 95 === Chemically adhesive anchors are widely used in all kinds of construction for their convenience and high performance. Since earthquakes occur frequently in Taiwan, and the post-earthquake capacity of anchors is not well-discussed by engineers and researchers, the major objectives of this research are to determine the post-earthquake capacity of adhesive anchors and to estimate that how many cycles of load an anchor could endure before it fails. Both experimental tests and finite element analysis are performed to obtain the tensile capacity of adhesive anchors and to investigate the influence of seismic loadings on the anchors. It is found from the experimental results that an anchor can resist more than 70 thousands load cycles of cyclic load of 19.4 kN (about 88% of ultimate capacity of that anchor) before failure. And the residual tensile capacity of an anchor already sustained 3 millions cycles of smaller load level (14.5 kN) can still reach its ultimate tensile capacity. The finite element analysis results show that concrete in an anchor system starts to crack at the very early stage of the seismic loading, but the area of crack is confined within a small region and never expand during the rest loading cycles. Besides, the residual tensile capacity of an adhesive anchor is not different than the ultimate tensile capacity if one, two, or three complete cycles of seismic loading are applied to the anchor. This phenomenon indicates that the anchor capacity is not influenced by only few seismic cycles.