Yuan Jian, Luo Liang, Zheng Yuzhou, Yu Suhui, Shi Jun, Wang Jianan, Shen Jiyang
Academy of Combat Support, Rocket Force University of Engineering, Xi'an 710025, China.
Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China.
Materials (Basel). 2022 Aug 5;15(15):5414. doi: 10.3390/ma15155414.
Based on numerical shape functions and the structural stressing state theory, the mechanical properties of the curved prestressed concrete box girder (CPCBG) bridge model under different loading cases are presented. First, the generalized strain energy density () obtained from the measured strain data is used to represent the stressing state pattern of the structure; then, the stressing state of the concrete section is analyzed by plotting the strain and stress fields of the bridge model. The stressing state pattern and strain fields of the CPCBG are shown to reveal its mechanical properties. In addition, the measured concrete strain data are interpolated by the non-sample point interpolation (NPI) method. The strain and stress fields of the bridge model have been plotted to analyze the stressing state of the concrete cross-section. The internal forces in the concrete sections are calculated by using interpolated strains. Finally, the torsional effects are simulated by measuring the displacements to show the torsional behavior of the cross-section. The analysis and comparison of the internal force and strain fields reveal the common and different mechanical properties of the bridge model. The results of the analysis of the curved bridge model provide a reference for the future rational design of bridge projects.
基于数值形状函数和结构应力状态理论，给出了不同荷载工况下曲线预应力混凝土箱梁（CPCBG）桥模型的力学性能。首先，利用从实测应变数据中获得的广义应变能密度（）来表示结构的应力状态模式；然后，通过绘制桥梁模型的应变和应力场来分析混凝土截面的应力状态。展示了CPCBG的应力状态模式和应变场，以揭示其力学性能。此外，采用非采样点插值（NPI）方法对实测混凝土应变数据进行插值。绘制了桥梁模型的应变和应力场，以分析混凝土截面的应力状态。利用插值应变计算混凝土截面的内力。最后，通过测量位移来模拟扭转效应，以展示截面的扭转行为。内力和应变场的分析与比较揭示了桥梁模型的共同和不同力学性能。曲线桥模型的分析结果为今后桥梁工程的合理设计提供了参考。
