Evaluating the Bond-Loss of Reinforcing Bar in New Concrete Member Subjected to Earthquake Using the Impact-Echo Method

• Main Authors: Keng-Chang Hsu, 許耿蒼
• Other Authors: Chia-Chi Chen
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/vaxxhf

碩士 === 朝陽科技大學 === 營建工程系碩士班 === 90 === The relation between the steel-amplitude in the simulated transfer function and the bar diameter-to-depth-ratio was introduced first in order to predict the average steel amplitude for steel bars in good-bonded condition for arbitrary steel arrangement in structures. The lower-valued steel amplitudes were found by the impact-echo tests on the specimens vibrated at early age, so were the lower local bound stress by the pullout tests. The relations of loss of steel amplitude and local bound loss were constructed for the specimens failed by pullout mode and split mode. These relations can be applied for evaluating the bond loss of multiple bars contained in the structural member.