The Study of CFRP Applied on the Restoration of Historical Wooden Components

• Main Authors: Do--Yi Wang, 王督宜
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/99742282757786377004

碩士 === 國立雲林科技大學 === 文化資產維護系碩士班 === 91 === The historical Chinese architectures were mostly built from wood. The wooden components would therefore come into biological or physical deterioration after worn and torn by the wind, sun, and rain; hence, restoration would be necessary. However, the wooden component restoration method that was critical to the structural safety of the architectures was at an infant stage. In this vein, this research studied the reinforcement method for restoration of wooden components while focusing on the mortise and tenon wood joint reinforcement, macromolecule material reinforcement, wood joint positions, and MOR tests. The experimental materials were tested for MOR against log and deflection rate after the reinforcement to search for the optimal log reinforcement method. This research also discussed the effects of different beam joint methods on the withdrawal and bending strength. The research findings were as follows: 1. The effects of mortise and tenon wood joint on log bending strength The largest MOR test log used adhesive Sika330, mortise and tenon--square tenon at 90°, loading at 90°, and the log MOR was 1/3 of the experimental log MOR. As mortise and tenon wood joint was not sufficient to substitute for the experimental log, macromolecule material should be used for reinforcement. 2. The improvement effect of macromolecule material on log bending strength When the carbon fiber board was inserted beneath the macromolecule material, the MOR was the largest when the carbon fiber cloth wrapped two layers, at 206% of the experimental log ; when the carbon fiber was inserted at the level, the MOR was the smallest, at 68% of the experimental log. 3. The effects of log joint positions on the bending strength Inserted carbon fiber boards had MOR larger than the experimental log at different joint position; yet the joint position showed little differences in the MOR, at about 138-151% of the experimental log. 4. The effects assembly methods on beam withdraw strength Withdraw strength was square tenon with adhesive, sheared tenon with adhesive, square tenon with anchorage＞sheared tenon without adhesive＞ square tenon without adhesive. The withdraw strength of square tenon with adhesive, sheared tenon with adhesive, and square tenon with anchorage were approximate, yet the withdraw strength of sheared tenon without adhesive was larger than that of square tenon without adhesive. 5. The effects of assembly methods on bending strength Materials of square tenon with adhesive, square tenon with anchorage bending strength＞sheared tenon with adhesive＞square tenon without adhesive, sheared tenon without adhesive.