摘要
文章基于非零应矩理论对弯曲梁的下挠变形进行分析,建立了挠度微分方程,并与应力理论下的挠曲线微分方程进行对比分析,得出非零应矩理论计算的抵抗弯矩为经典材料力学理论的抵抗弯矩0.77~0.83倍;在外界荷载作用下,非零应矩理论挠度较应力理论的计算挠度大1.20~1.30倍,给出了应力理论挠度与实际挠度的存在挠度长期效应系数的解释。最后结合连续刚构桥下挠病害的特点,运用非零应矩变形分析其主要影响因素。
In this paper,the deflection differential equation is established based on the non-zero point force moment elasticity theory to analyze the flexural deformation of the bending beam,and compared with the deflection line differential equation under the stress theory,it is concluded that the resistance moment calculated by the non-zero point force moment elasticity theory is 0.77~0.83 times of the classical material mechanics theory.Under the action of external load,the theoretical deflection of non-zero point force moment elasticity theory is 1.20~1.30 times larger than the calculated deflection of stress theory.The long-term effect coefficient of deflection between theoretical deflection and actual deflection is explained.Finally,according to the characteristics of downtorsion of continuous rigid frame bridge,the main influencing factors are analyzed by using non-zero strain deformation.
作者
车野
梁军林
刘德龙
叶明珠
CHE Ye;LIANG Jun-lin;LIU De-long;YE Ming-zhu(Guangxi Vocational and Technical College of Communications,Nanning 530023,China;Guangxi University,Nanning 530004,China;China Railway 18th Bureau Group Second Engineering Co.,Ltd.,Tangshan 063000,China)
出处
《价值工程》
2023年第22期150-152,共3页
Value Engineering
基金
广西壮族自治区教育厅2022年广西高校中青年教师科研基础能力提升项目(自然科学类)“基于截面刚度的大跨径连续刚构桥跨中下挠防治研究”(编号:2022KY1131)。
关键词
非零应矩理论
挠度方程
连续刚构桥
影响因素
non-zero point force moment elasticity theory
deflection equation
continuous rigid frame bridge
influencing factors
