摘要
为研究胶合木-混凝土组合楼板受弯性能,采用ABAQUS有限元软件建立9个组合楼板模型,其中楼板部分采用实体单元,钢筋采用桁架单元。有限元分析采用三分点加载方式,研究组合楼板模型纯弯段混凝土强度、连接方式、混凝土层厚度以及胶合木厚度等因素对组合楼板抗弯强度的影响,并探究组合楼板纯弯段的破坏形态。结果表明:采用胶结加抗剪连接件连接的组合楼板其受弯极限承载力比采用胶结连接的组合楼板提高了11.35%,比采用抗剪连接件的组合楼板提高了32.64%。混凝土强度、胶合木层厚度及混凝土层厚度的增加均能提高组合楼板的极限承载力。胶合木-混凝土组合楼板表现出良好的抗弯性能,且能减少混凝土用量,发挥木材的优势,值得在实际工程中推广应用。
In order to study the flexural behavior of the glulam-concrete composite floor slabs,9 composite floor models were established with ABAQUS finite element software.The floor part adopted solid elements,and the reinforcement adopted truss elements.Simulate the interaction between composite floor slabs through binding and cohesive methods.The three-point loading method was used to evaluate the influence of the concrete strength,connection method,concrete layer thickness and glulam thickness of the composite floor model on the bending strength of the composite floor model pure bending section,and explore the failure modes of pure bends.The results showed that the flexural ultimate bearing capacity of the composite floor slab connected by adhesive and shear connectors was 11.35%higher than that of the composite floor slab connected by adhesive,and 32.64%higher than that of the composite floor using shear connectors.The increase in concrete strength,glulam layer thickness,and concrete layer thickness can all increase the ultimate bearing capacity of the composite floor.Glulam-concrete composite floor slabs showed good bending resistance,reducing the amount of concrete,and giving full play to the advantages of wood.It was worthy of popularization and application in practical projects.
作者
杨海旭
董彦博
张茂花
王海飙
YANG Hai-xu;DONG Yan-bo;ZHANG Mao-hua;WANG Hai-biao(School of Civil Engineering,Northeast Forestry University,Harbin 150040,Heilongjiang,P.R.China)
出处
《林产工业》
北大核心
2022年第8期34-39,57,共7页
China Forest Products Industry
基金
中国地震局建筑物破坏机理与防御重点实验室开放基金资助项目(FZ211105、FZ201105)
国家自然科学基金面上项目(51878130)。
关键词
胶合木-混凝土组合楼板
受弯性能
有限元分析
三分点加载
抗剪连接
Glulam-concrete composite floor slabs
Flexural behavior
Finite element analysis
The three-point loading method
Shear connection
