| Summary: | 碩士 === 立德管理學院 === 資源環境研究所 === 94 === Mechanical behaviors of Timber connections of Chuan-Dou Structures are the most popular and well-known construction strucyures.These were used for generally places, houses, and temples in the early edge.However, many buildings such as historical sites, old construction ornamental, have been damaged after 921 earthquakes.However, the researches on timber joints have attracted more attention recently in Taiwan; and Chuan-Dou connections, especailly, which are caupht people's uttention and have more researches on it. So this research is as drawing and trying the function and offering the mechanics characteristic of the other rigidity contact the framework to this kind of contact mainly, to carry on research and analys.
According to the researches in the past, the lintel, Liang and column, this kind of surface connections shown they are sluggishly returns to the circle, not to have the symmetry. Also, it has a direction to revolve stiffness which is small. Therefore according reference, we can analyse the Stepped Dove-tail and Go-Dou Connections under the function of shortcoming and destruction pattern of ultimate moment capacity and by experiment of size instead of the experiment of small size; then aims at these destruction patterns and the shortcoming preferment to improve. Also, based on the existing historical sites of preservation of international charter, using the epoxy resin to match the screw, peg, iron sheet, and so on, which invertible the labor laws at the contact to carry on making up strongly and then discuss these in the similar foundation to make up the strong measure, the effect and its to revolves the behavior influence.
After 18 tests of the reinforced experiment, we discovered two results as below: (1)Improvement of Positive rotational stiffness and ultimate moment. (2)The decrease Positive stiffness of Hysteretic loop more than decrease of Negative stiffness. (3)The change of destruction level. However, according to the whole reinforced effect, (1) Stepped Dove-Tail connections, produces take the wedge the compressive parallel to grain adds on peg makes up the strong design as to be best. (2) Go-Dou connections, makes up the strong design take two iron sheets as to best. Makes up by this two kinds strongly tries the body the mechanical properties and the destruction pattern looked that, the future following research will be allowed towards the lignin material natural deviancy, the metal to buckle the geometry condition the change and the artificial Shi Tso accuracy, will make the consideration design prediction models for rotational stiffness and ultimate moment capacity.
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