考虑滑移效应的钢板-混凝土组合板刚度分析  

Stiffness Analysis of Steel Plate-concrete Composite Slab Considering Slip Effect

作　　者：吴丽丽[1] 琚祥凯 吕步凡 肖圣超 WU Lili;JU Xiangkai;LU Bufan;XIANO Shengchao(School of Mechanics and Civil Engineering,China University of Mining and Technology( Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《湖南大学学报（自然科学版）》2019年第3期59-65,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51678564)~~

摘　　要：采用折减刚度法分析了钢板-混凝土组合板在受弯状态下交界面的滑移情况,建立了界面剪力关于剪跨段长度的函数,进而推导了跨中一点加载和两点加载情况下组合板跨中挠度的计算式.此外,将钢板-混凝土组合板看作是底部纵向受拉钢筋锚固在底面的混凝土结构,基于钢筋混凝土梁的抗弯刚度计算式,并采用修正的折减钢板宽度系数法近似考虑钢板与混凝土滑移的影响,得到了组合板抗弯刚度计算式,进而利用材料力学公式进一步计算组合板跨中挠度.将这2种方法的计算结果与4组共9块简支组合板的试验结果进行对比,发现计算结果与试验结果吻合良好,2种方法均可用于计算钢板-混凝土组合板跨中挠度,且第2种方法具有一定的安全储备,方便实际工程的设计应用.The interface slip of simply-supported steel plate-concrete composite slabs under bending moment was analyzed by using the reduced stiffness method, the function of the interface shear with shear span was estab-lished, and then the calculation formula of deflection under single-point loading and two-point loading was deduced.Meanwhile,assuming the steel plate-concrete composite slab as a type of reinforced concrete with the steel bars an-chored at the bottom,based on the stiffness formula of the reinforced concrete beams, the design method of flexural stiffness of composite slabs. was obtained and the mid-span deflection of the composite slab was derived by the ma-terial mechanic formula. The slip effect between the steel plate and concrete was considered by using the method of the modified width reduction of steel plate. These two methods were compared with the experimental results of 9 sim-ply-supported composite slabs, which were in good agreement. Both the two methods can be used to calculate the deflection of composite slabs, the second method has some safety reservation, and the second method is convenient to the design and application of the practice engineering.

关 键 词：钢板-混凝土组合板 折减刚度法 滑移效应 挠度 

分 类 号：TU317.2[建筑科学—结构工程] TU392.4