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題名 | Evaluation of the Moment Splicing Performance of Beam-to-Beam-Connected Structural Glulam Using Japanese Cedar=柳杉集成材梁梁接合之抗彎矩性能評估 |
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作者 | 葉民權; 林玉麗; 張延信; | 書刊名 | 臺灣林業科學 |
卷期 | 29:1 2014.03[民103.03] |
頁次 | 頁1-15 |
分類號 | 436.51 |
關鍵詞 | 接合; 集成材; 抗彎強度; 柳杉; Connection; Glulam; Bending strength; Japanese cedar; |
語文 | 英文(English) |
中文摘要 | 本研究利用30~40年生柳杉造林木製造對稱異等級結構用集成材,並以尺寸為140×304×3000mm之集成材以縱向端接組成6000mm長之梁構材。在梁接合處以所設計之兩種金屬連結件配合不同數量之扣件進行彎矩補強,所組成之梁-梁構材以6階段反覆載重及單向載重進行4點抗彎試驗。結果顯示,以U型連結件組合之集成材梁構材的彎曲破壞強度及彈性模數分別較以T型連結件組合之梁構材高出14及22%。在以T型連結件利用6或8支扣件組合之梁構材,其彎曲破壞強度比以4支扣件組合者改善23%,而在以U型連結件組合條件,則可以改善43%。依柳杉結構用集成材指定等級之強度容量而言,分別以T型及U型連結件組合之梁-梁接合集成材構材其彎曲破壞強度可以達到56~71及57~87%。在彎曲彈性模數方面,以T型連結件組合時可達71~84%,以U型連結件組合時可達89~98%。由穩定包封曲線顯示,T型連結件利用4支扣件組合之集成材梁構材,其彎曲載重容量較其他扣件數量或是連結件型式低35%,在剛性方面低37%。 |
英文摘要 | A symmetrical mixed-grade composition glulam was fabricated using 30~40-yr-old Japanese cedar plantation timber in this study. Each glulam with size of 140×304×3000 mm was connected end-to-end longitudinally to form a 6000-mm beam member. Two types of metal connectors were designed for moment splicing at the beam connection with various numbers of fasteners. The beam-to-beam-connected member was subjected to a 4-point flexural test with 6 stages of repeated loading and a monotonic loading application. Results indicated that glulam beams joined with U-type connectors had 14 and 22% higher modulus of rupture (MOR) and modulus of elasticity (MOE), respectively, than those with T-type connectors. The MOR of beam-to-beam-connected glulam members assembled with both 6 and 8 fasteners using the T-type connector increased by 23% compared to that with 4 fasteners, and 43% when using the U-type connector. MOR values of beam-to-beam-connected glulam members with T- and U-type connectors reached 56~71 and 57~87%, respectively, of the given strength capacity for an assigned glulam grade. In the case of the MOE, values were 71~84% for T-type connection groups and 89~98% for U-type connection groups compared to the given MOE of the assigned grade for Japanese cedar. Stable envelop curves indicated that glulam beams connected with the T-type connector and 4 fasteners had a 35% lower bending load capacity and 37% lower stiffness among different connector types and various numbers of fasteners. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。