铰接型装配式锚杆框架梁受力变形特性研究  

Stress-induced deformation characteristics of a hinged prefabricated anchor frame beam

作　　者：张军辉 周书胤 张石平 黎峰[2] ZHANG Junhui;ZHOU Shuyin;ZHANG Shiping;LI Feng(Key Laboratory of Highway Engineering,Ministry of Education,Changsha University of Science&Technology Changsha 410114,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]长沙理工大学公路工程教育部重点实验室,湖南长沙410114 [2]华东交通大学土木建筑学院,江西南昌330013

出　　处：《长沙理工大学学报(自然科学版)》2025年第1期1-14,共14页Journal of Changsha University of Science & Technology:Natural Science

基　　金：国家杰出青年科学基金项目(52025085);科技部国家重点研发计划项目(2021YFB2600903);国家自然科学基金重点项目(52338009)。

摘　　要：【目的】提出一种铰接型装配式锚杆框架梁的内力计算方法,为铰接型框架梁的设计提供理论基础。【方法】首先,将框架梁的受力模型简化为铰接点连接的多段Winkler弹性地基梁;然后,结合梁的边界及连续性条件推导求解,得到梁的内力解析解,并依托数值算例分析了铰接型框架梁结构与现有现浇框架梁结构的受力变形特性,以及在不同锚固力、地基反力系数、截面尺寸、悬臂长度、铰接位置条件下的铰接型框架梁结构的受力变形特性;最后,将现场实际监测数据与本文理论计算结果进行对比,验证本文计算结果的准确性。【结果】通过所得解与已有解的退化对比验证了所得内力解析解的合理性;当其他参数相同时,锚固力越大、悬臂长度越大、铰接位置与锚固点之间的距离越大,则铰接结构的最大弯矩值越大;地基反力系数和截面尺寸对框架梁结构的梁底位移和转角影响显著,当地基反力系数和截面尺寸增大时,梁底位移和转角减小,而弯矩和剪力则基本不变。通过分析现场监测数据发现,现场实测结果与本文内力计算结果的变化趋势吻合。【结论】铰接型框架梁的内力解析解的结果合理,其受力变形特性规律可为铰接型框架梁的设计提供参考。[Purposes]An internal force calculation method for hinged prefabricated anchor frame beams was proposed,providing a theoretical basis for the design of a hinged frame beam.[Methods]Firstly,the stress model of the frame beam was simplified into a multi-stage Winkler elastic foundation beam connected by hinged points.Then,based on the boundary and continuity conditions of the beam,the analytical solution of the internal force of the beam was obtained.The stress and deformation characteristics of the hinged frame beam structure and the existing cast-insitu frame beam structure were analyzed by numerical examples,as well as the stress-induced deformation characteristics of the hinged frame beam structure under different anchorage forces,foundation reaction coefficient,section size,cantilever length and hinged position.Finally,the accuracy of the calculation results in this paper was verified by comparing the actual monitoring data with the theoretical calculation results in this paper.[Findings]The rationality of the internal force analytical solution is verified by comparing the degradation of the obtained solution with the existing one.When other parameters are the same,a larger anchorage force means a larger cantilever length and larger distance from the hinged position to the anchorage point,resulting in a larger maximum bending moment value of the hinged structure.The foundation reaction coefficient and section size have a significant effect on the bottom displacement and rotation angle of the frame beam structure.As the foundation reaction coefficient and section size increase,the bottom displacement and rotation angle decrease,while the bending moment and shear force are basically unchanged.Through the analysis of field monitoring data,the field measurement results are consistent with the trend of internal force calculation results in this paper.[Conclusions]The analytical results of the internal force of hinged frame beams are reasonable,and the law of stressinduced deformation can provide a reference for the

关 键 词：铰接型装配式锚杆框架梁 Winkler弹性地基梁 内力计算 受力变形特性 结构设计 

分 类 号：U417.2[交通运输工程—道路与铁道工程] TU416.14[建筑科学—岩土工程]