钢空腹夹层板结构基本力学性能

Mechanical Performance of Steel Vierendeel Sandwich Plate Structure

钢空腹夹层板是一种新型楼盖结构,具有跨度大、重量轻、厚度薄等特点,它与一般井字梁结构不同之处在于空腹夹层板需考虑剪切变形对结构的影响。采用拟夹层板连续化分析建立结构上下肋的等效薄膜刚度方程和剪力键夹心层的折算剪切刚度方程,给出结构在四边简支条件下的解析解。针对同一算例,将连续化分析的结果与有限元分析以及简化计算进行对比研究,结果表明:3种方法得出的挠度误差在5%以内,下弦杆件轴力误差在15%以内;采用连续化分析进行钢空腹夹层板结构的静力计算,具有较高的精度,简化计算方法具有足够的安全储备,可应用于实际工程。

Steel vierendeel sandwich plate（SVSP） is a new kind of floor system, with the characteristics of long span, lightweight and thin thickness. The influence of shear deformation needs to be considered in SVSP structures, which is deferent from me-chanical performance of normal cross beams. Based on the principle of continuous analysis, the membrane stiffness of upper andlower surface layers and the equivalent shear stiffness of shear connecter interlayer are established, respectively. Then the analyticsolution is gotten under boundary condition simply supported on four sides. According to a calculation example, the results of contin-uous analysis are compared with those of FEM analysis and simplified calculation. The comparison results show that the deflectionerror in mid-span is less than 5% and the axial force error in lower chord is less than 15%. Obviously, the continuous analysis hasgood accuracy and the simplified calculation method has high safety and good feasibility used in actual engineering.