预应力钢绞线增强胶合木抗弯性能研究  

RESEARCH ON FLEXURAL PERFORMANCE OF PRESTRESSED STEEL STRAND REINFORCED GLULAM

作　　者：陈暑冰 申士杰[2] 佟晓超 CHEN Shu-bing;SHEN Shi-jie;TONG Xiao-chao(China Academy of Building Research Co.,Ltd.,100013,Beijing,China;Beijing Forestry University,100083,Beijing,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]北京林业大学,北京100083

出　　处：《建筑技术》2021年第3期269-273,共5页Architecture Technology

基　　金：国家重点研发计划资助(2016YFC0701800)。

摘　　要：研究不同预应力钢绞线增强胶合木的抗弯性能,通过对钢绞线施加预应力增强胶合木可以显著提高胶合木的抗弯性能。预应力钢,线增强胶合木的抗弯强度与抗弯弹性模量随预应力增加而增大,当施加66%预应力时抗弯强度达到70.75 MPa,抗弯弹性模量达到16.03 GPa,较未增强胶合木分别增加了69.4%和34.1%。In this paper,the method of applying prestress to steel strands was used to strengthen the the structure glued laminated timber.By applying prestressing force to steel strands,the flexural perform ance of the structural laminated tim ber can be im proved significantly.The flexural strength and flexural modulus of the structural glued laminate timber reinforced with prestressed steel strands increased with the increase of prestress.When the prestress reached 66%,the flexural strength and modulus of flexural elasticity were 70.75 MPa and 16.03 GPa respectively,which were 69.4%and 34.1%higher than that of unreinforced glulam respectively.

关 键 词：预应力 钢绞线 胶合木 抗弯性能 

分 类 号：TU74[建筑科学—建筑技术科学]