Experimental study on bending behavior of large-section #br#
glulam string curved beam and splicing joint
Cao Zhenggang1,2 Wan Zongshuai1, 2 Yang Han1,2 Wang Wei1,2 Bai Weidong3
1. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;
3. Daxinganling Shenzhou Arctic Wood Industry Co., Ltd., Mohe 165300, China
Abstract：Modern large-section glued-wood structures are beautiful with embedded double-steel joints and are relatively reasonable in configuration. However, due to the complicated technological process and few related studies, there are few applications. A full-scale specimen of large-section glued-wood splicing joint with double-steel pin connection was designed and manufactured. The failure mode and failure mechanism of the joint were studied through the destructive test of the flexural bearing capacity under static load. Furthermore, this joint was applied to a 30-meter long-span glulam beam, and a 1∶1 full-scale specimen was designed and loaded to study its working function, bearing capacity, and macro-and micro-structure response. The tests of splicing joints show that the joint does not exhibit steel pin slipping during pure bending loading, and the joint is eventually damaged because the wood at the pin hole in the tension zone reaches the compressive strength, indicating that such joints are reasonable in stress states. The tests on a 30-meter spanned string beam show that after the beam is pre-stressed, its vertical stiffness is significantly increased and its deformation is reduced; it works in the elastic range and exhibits good mechanical properties.
曹正罡 万宗帅 杨寒 王伟 白伟东. 大断面胶合木张弦曲梁及拼接节点静载受弯试验研究[J]. 土木工程学报, 2020, 53(7): 43-51.
Cao Zhenggang Wan Zongshuai Yang Han Wang Wei Bai Weidong. Experimental study on bending behavior of large-section #br#
glulam string curved beam and splicing joint. 土木工程学报, 2020, 53(7): 43-51.
