胶合木-混凝土简支组合梁力学性能研究  

Study on Mechanical Properties of Glued Laminated Wood-Concrete Simply Supported Composite Beams

作　　者：刘一凡 王鹏[1] 王永慧 史世论 韩春秀[3] 彭俊源 Yifan Liu;Peng Wang;Yonghui Wang;Shilun Shi;Chunxiu Han;Junyuan Peng(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;City College,Kunming University of Science and Technology,Kunming 650500,China;School of Electrical and Information Technology,Yunnan Minzu University,Kunming 650504,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]昆明理工大学城市学院,昆明650500 [3]云南民族大学电气信息工程学院,昆明650504

出　　处：《钢结构（中英文）》2023年第7期1-11,共11页Steel Construction（Chinese & English）

基　　金：国家自然科学基金项目(51308269,52068068,51708486)。

摘　　要：胶合木-混凝土简支组合梁结合了胶合木与混凝土两种材料的结构力学特性,木梁通过剪力连接件与混凝土板形成一个整体,以此达到共同工作的作用。目前,在多高层建筑以及木结构建筑中得到了广泛的应用。另外,木结构符合绿色建筑的发展理念,发展木结构建筑可以降低建筑行业对环境的影响,具有十分重要的意义。为研究荷载形式和栓钉布置方式对胶合木-混凝土简支组合梁的滑移、挠度以及内力的影响,主要利用ANSYS软件进行建模分析,并与均匀情况布置下的栓钉进行对比分析,从而验证模型的正确性。基本假设为胶合木与混凝土为理想的线弹性材料,不考虑混凝土的开裂,基于此,讨论荷载形式、栓钉布置方式对滑移、挠度和内力的影响。建模思路:对于混凝土C30采用Solid 65单元进行建模,木梁则采用Solid 45单元,而栓钉则采用Conbine 39,栓钉本构采用Lukaszewska E中所拟合出的SST+S型号的连接件。同时进行参数化分析,输出组合梁的滑移、挠度和内力,并与胶合木-混凝土简支组合梁理论值做对比分析。结果表明:虽然木材是一种正交各向异性的材料,但是可以按材料力学的相关理论取与受力方向一致的弹性模量,通过钢-混组合梁的理论公式来推导胶合木-混凝土组合梁的公式,并且其滑移分布规律与钢-混组合梁分布规律一致,呈现出梁端大、中间小的分布规律,其有效刚度可以采用欧洲规范EN 1995-1-1中的“γ”进行计算,误差非常小;可以通过钢-混组合梁滑移理论的思路来推导胶合木-混凝土组合梁滑移理论公式,误差在7%左右;在剪力图面积大小相等时,对称集中荷载下组合梁的滑移及挠度最大,在工程中应尽量避免;在大多数荷载作用下,应根据滑移图合理分段布置栓钉,可以有效减少组合梁的滑移和挠度;ANSYS有限元软件可以正确模拟胶合木-混凝土简支组合梁,且具The Glued-laminated timber-concrete simply-supported composite beam combines the structural mechanical properties of both glued wood and concrete.The wood beam forms a whole with the concrete slab through shear connectors,thus achieving a common working effect,and is widely used in multi-story buildings as well as in wood-frame buildings.Secondly,wood structure is in line with the development concept of green building,and the development of wood structure building can reduce the impact of the construction industry on the environment,which is of great importance.To investigate the effects of load form and peg arrangement on the slip,deflection and internal forces of Glued-laminated timberconcrete simply-supported composite beam,the modeling analysis was mainly performed using Ansys software and compared with the pegs in a uniform case arrangement to verify the correctness of the model.The basic assumption is that glulam and concrete are ideal linear elastic materials and that cracking of concrete is not considered.Based on this,this paper discusses the effects of the form of loading and the way the pegs are arranged on slip,deflection and internal forces.The modeling methods are as follow:for concrete C30,solid 65 units were used for modeling,wood was modeled with solid 45 units,while pegs were modeled and analyzed with conbine 39,and the constitutive model of pegs was modeled with the SST+S type joint fitted in Lukaszewska E.And parametric analysis is performed,and the slip,deflection and internal force of the combined beam were output.And compare the analysis with the theoretical values of the glued laminated wood-concrete composite beam.The results show that although wood is an orthotropic anisotropic material,it is possible to derive the equation for the Gluedlaminated timber-concrete simply-supported composite beam by taking the modulus of elasticity in the same direction as the force according to the knowledge of mechanics of materials,and by using the theoretical equation for steel-composite combination bea

关 键 词：胶合木-混凝土组合梁 ANSYS有限元分析 界面滑移 挠度 组合内力 

分 类 号：TU398.9[建筑科学—结构工程]