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自从马鞍板结构产生以来,由于该构件具有良好的力学性能并便于工业化生产,因此得到了广泛应用。为了研究马鞍板结构的承载性能,本文选择适用于结构分析的八节点六面体Solid65单元模型对马鞍板结构进行ANSYS有限元分析,采用能反映混凝土开裂和压溃的非线性随动强化模型作为混凝土本构关系曲线。分析模型中的预应力钢绞线选择可以用来模拟缆索、连杆、弹簧等元件的Link8三维杆单元,采用预应力钢绞线与混凝土之间无相对滑移作为位移协调关系。计算结果表明:马鞍板结构承受载荷主要由纵向的薄膜力来承担且纵向弯矩作用很小,马鞍板在均布荷载作用下挠度较小,托座使马鞍板在纵向产生部分拉力。本文结论可以为马鞍板结构设计提供重要的参考依据。
Since the saddle plate structure has been produced, it has been widely used because of its good mechanical properties and ease of industrial production. In order to study the bearing capacity of the saddle plate structure, this paper chooses the Solid Hex element model of the eight-node hexahedron which is suitable for the structural analysis to carry on the ANSYS finite element analysis of the saddle plate structure and adopts the non-linear follow-up strengthening model which can reflect the concrete cracking and crushing as the concrete Structure relationship curve. The prestressing strand selection in the analysis model can be used to simulate the Link8 three-dimensional bar element of cables, links, springs and other components, using no relative slippage between the prestressing strand and concrete as a displacement coordination relationship. The calculation results show that the load of the saddle plate structure is mainly borne by the longitudinal film force and the longitudinal bending moment is small. The saddle plate has less deflection under the uniform load. The saddle plate causes the saddle plate to generate partial tension in the longitudinal direction. The conclusion of this paper can provide an important reference for the design of saddle plate structure.