预应力胶合木-混凝土组合梁受弯性能的试验研究  

Experimental Research on Bending Performance of Prestressed Glulam-Concrete Composite Beams

作　　者：陈溪 许清风 张富文 冷予冰 王明谦 陈玲珠 CHEN Xi;XU Qingfeng;ZHANG Fuwen;LENG Yubing;WANG Mingqian;CHEN Lingzhu(Shanghai Key Laboratory of Engineering Structure Safety,Shanghai Research Institute of Building Sciences Co.,Ltd.,Shanghai 200032,China;Shanghai Jianke Prestressed Engineering Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]上海市建筑科学研究院有限公司,上海市工程结构安全重点实验室,上海200032 [2]上海建科预应力技术工程有限公司,上海200032

出　　处：《工业建筑》2024年第10期70-76,共7页Industrial Construction

基　　金：上海市优秀技术带头人项目(22XD1432100);上海市自然科学基金(23ZR1454400)。

摘　　要：进行了4组12个预应力胶合木-混凝土组合梁试件的受弯试验,试验参数为抗剪连接型式,包括凹槽连接、凹槽加螺钉连接、多种组合连接。结果表明:预应力胶合木-混凝土组合梁试件的主要破坏模式为木材的受弯破坏;对于同样采用凹槽加螺钉连接的组合梁试件,施加预应力后的平均受弯承载力提高了20.3%、破坏刚度提高了10.1%。组合梁试件破坏时,剪力连接处发生明显的滑移;采用凹槽加螺钉连接的组合梁试件在破坏时整体性和受弯承载力均优于其余两组组合梁试件,连接效果较好。Four sets of 12 bending tests of prestressed glued laminated timber(glulam)-concrete composite beams with different shear connections were tested.The test parameter is the shear connection form,including notch connections,notch plus screw connections,and the combination of multi connections.The results of the bending test showed that the main failure mode of the composite beams was the bending failure of the timber.For beams with the same notch plus screw connection,applying prestress increased the average bending bearing capacity by 20.3%,the average collapse bending stiffness by 10.1%.At failure,obvious slip occurred at the shear connection.The beam with notch plus screw connection showed better integrity and flexural capacity when it failed compared to the other two sets of composite beams,which meant that the notch plus screw connection presented a better connection effect.

关 键 词：预应力 胶合木-混凝土组合梁 剪力连接 受弯试验 

分 类 号：TU398.9[建筑科学—结构工程]