论文部分内容阅读
考虑板中剪力滞后效应和部分板-梁界面剪力的交互作用,提出用梁单元进行钢-混凝土组合板有限元分析。采用位移方法,根据Newmark模型,建立沿着梁轴方向的屈曲形状函数以及对横截面进行屈曲形状描述的密度函数,建立部分剪力连接的组合梁模型。时效性能通过混凝土的离散型粘弹性蠕动规律给予考虑。借助有限元方法和改进程序,获得数值解。考虑第二和第三阶哈密特多项式以保证与位移的内插值相协调,提出一个细化、固定为13个自由度的有限梁单元。长期负荷下,试验结果的收敛性以及与组合梁试验结果的比较验证了所提方法的精确性。进一步的实际应用也显示所提单元的精确性以及在描述桥组合板弹性和时效性方面的能力。
Considering the effect of shear lag in plate and the interaction of shear force at some plate-beam interfaces, finite element analysis of steel-concrete composite plate with beam element is proposed. According to the Newmark model, a buckling shape function along the beam axis and a density function describing the buckling shape of the cross section are established by using the displacement method, and a composite beam model with partial shear connection is established. Aging performance through concrete discrete viscoelastic law to give consideration. By means of finite element method and improved program, numerical solution is obtained. Considering the second and third order Hamiltonian polynomials to ensure coordination with the interpolated displacement, a finite beam element refined and fixed at 13 degrees of freedom is proposed. Under long-term load, the convergence of the test results and the comparison with the experimental results verify the accuracy of the proposed method. Further practical applications also show the accuracy of the units being submitted and their ability to describe the flexibility and timeliness of the bridge deck.