結構用集成材柱梁結構以埋入式金屬連結件接合之彎矩抵抗性能評估

本研究採用國產柳杉造林木製造質大尺寸之結構用柱梁集成材，梁構材斷面為140 × 304 mm，集成元經打音分等及配置後其等級為E95-F270，柱構材斷面140 × 152 mm，等級為E75-F240。集成材以埋入式金屬連結件配合插銷及螺栓扣件組成梁柱結構，進行懸臂反覆彎矩試驗探討其接合強度特性。結果顯示，以直徑20及16 mm插銷組合條件之接合最大彎矩承載能力分別較直徑13 mm插銷組合者高23.4及14.0%。以5支扣件接合者之最大彎矩承載能力較3支扣件者高18.0%，同時也有較佳之彎矩旋轉係數。柳杉集成材以T型金屬連結件埋入組合之接合效率均介於7.8～10.1%，依CNS標定等級計算之剛性效率則介於0.053～0.106，與等效剛性效率相近且高於外觀剛性效率8.5%。在反覆載重過程中以5支20 mm直徑插銷扣件所組成之接合具有較佳之剛性及承載能力。

關鍵字

結構用集成材；接合強度；插銷扣件；柳衫；埋入式金屬連結件

並列摘要

Full sizes of structural glulams were manufactured using domestic Japanese cedar plantation timbers with a grade of E95-F270 of 140 × 304 mm beam members and E75-F240 of 140 × 152 mm column members in the study. The joint strength characteristics of the beam column structure assembled with an inserted metal connector and pins were investigated with a cyclic cantilever load protocol. The results indicated that the maximum bending moment capacity of the joints assembled with 20- and 16-mm pins were 23.4 and 14.0%, respectivwely, higher than that with 13-mm pin. The beam-column joint assembled with 5 fasteners showed 18.0% higher in maximum bending moment capacity than that with 3 fasteners and also had better bending moment-rotation coefficient. The joint efficiency of Japanese cedar glulam members jointed with an inserted metal connector were among 7.8~10.1 %. And, the stiffness efficiency estimated based on CNS nominal grades as among 0.053~0.106, which was similar to the equivalent stiffness efficiency and 8.5% higher than appearance stiffness efficiency. Further, the joint assembled with 5 20-mm pins showed better stiffness and bending moment resistance during the cyclic loading process.

並列關鍵字

Structural glulam ； joint strength ； pin fastener ； Japanese cedar ； metal insert connector

國際替代計量

結構用集成材柱梁結構以埋入式金屬連結件接合之彎矩抵抗性能評估

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