摘要
文章对桥梁工程转体施工中的球铰应力计算展开分析。对球铰进行设计时对半平面体受法向集中力进行分析,随后在此基础上计算启动力矩与转动力矩,获得相应数据以后,进行球铰有限元建模,其中包括弹性有限单元、接触理论计算、接触模型,最后进行转动系统局部受力分析。结果表明,将下球铰应力与下转盘进行对比,发现下球铰主应压力需大于纵向应力数值,整体上钢板应力表现为偏小,相应的混凝土整体应力呈现为偏大,整体上的应力机制表现为分布均匀。因此,应在明确边界条件的基础上计算接触面张力,获得相应的控制方程弱化式,与工程的实际情况相结合,配合计算结果构建一系列的常规模型、摩擦系数、不同情况下的球铰纵向应力。
This paper analyzes the calculation of spherical hinge stress in the rotation construction of bridge engineering. When the spherical hinge is designed, the normal concentrated force on the half-plane body is analyzed. On this basis, the starting torque and rotational torque are calculated. After obtaining the corresponding data, the finite element model of the spherical hinge is established, including the elastic finite element, the contact theoretical calculation,and the contact model. Finally, the local force analysis of the rotational system is carried out. The results show that by comparing the stress of the lower spherical hinge with the lower turntable, it is found that the main stress of the lower spherical hinge must be greater than the longitudinal stress value, and the overall stress of the steel plate is relatively small. The corresponding overall stress of the concrete is relatively large, and the overall stress mechanism is evenly distributed. Therefore, the contact surface tension should be calculated on the basis of clear boundary conditions to obtain the corresponding control equation weakening formula.Combined with the actual situation of the project, a series of conventional models, friction coefficient and longitudinal stress of spherical hinge under different conditions should be constructed with the calculation results.
作者
黄会锋
Huang Huifeng(Ganzhou Engineering Quality Management Service Center,Ganzhou,Jiangxi 341001)
出处
《工程技术研究》
2022年第8期109-112,共4页
Engineering and Technological Research
关键词
桥梁工程
转体施工
球铰应力
bridge engineering
rotation construction
spherical hinge stress
