ผลกระทบของจุดเชื่อมต่อกับการรับแรงของโครงข้อหมุนไม้ไผ่

Abstract

This research was to study the load capability in joint connection of bamboo truss by chooses “Phaileang” ( Common name : Hedge bamboo ) to make  the structure as “Howe Truss”. The bamboo truss were the  point load by hydrualic jack and compared to structure theory. The five types of joints are Double plywood plate and bamboo stick joint , Double plywood plate and bolts joint, Single plywood plate and bolts joint, Single plywood plate and bolts with nonshrink joint and a Steel sheet plate and bolt joint. The results were found that the double plywood plate and bolts joint is the maximum load with 1,912 kg., but the best connection joint is the steel sheet plate and bolt joint, becauses the member of truss has failure. In the type of joints was found that the joints which used double plywood plate were 68% more load bearing than single plywood plate. As the pin joint, the pin joint with bolts has greater load capacity than the pin with bamboo sticks over 141%. And nonshrink reinforcement compared to un nonshrink reinforcement has insignificant. Because the nonshrink cross-section of bamboo is not fully. The goal of the experiment compate with the structural theory, it was found that the connection joints were still unable to connect the member as they should be. The merging and transmission of forces are barely. In the experimental deflection distance are greater than the theory of deflection over 4 times.