波纹钢半圆拱加固钢筋混凝土盖板涵数值分析  

Numerical Analysis on RC Slab Culvert Rehabilitated with Corrugated Steel Semi-circular Arch

作　　者：李百建 付文强 符锌砂[2] 贺玉婷 LI Bai-jian;FU Wen-qiang;FU Xin-sha;HE Yu-ting(Guangzhou Institute of Building Science Group Co.,Ltd.,Guangzhou,Guangdong 510440,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou,Guangdong 510641,China)

机构地区：[1]广州市建筑科学研究院集团有限公司,广东广州510440 [2]华南理工大学土木与交通学院,广东广州510641

出　　处：《公路交通科技》2024年第4期90-98,共9页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(52108142);中国博士后科学基金项目(2023M740826)。

摘　　要：为了探索波纹钢半圆拱加固钢筋混凝土盖板涵的力学性能,采用室内试验与数值分析相互验证的方法,提出了基于填充混凝土弹塑性等效的波纹钢加固盖板涵的数值分析方法并进行了验证,在此基础上分析了影响加固体系承载力的主要因素。研究表明:钢筋混凝土盖板涵在加固之后发生了体系转换,板件由加固前的受弯构件转变为加固后存在拱效应的复合构件,破坏形式由加固前的受弯破坏转变为加固之后的剪切破坏,加固体系的极限承载力取决于钢筋混凝土板、填充混凝土的抗剪承载力和波纹钢的抗弯承载力,钢筋混凝土板的抗弯承载力对加固体系的作用有限,主要发挥了它的抗剪承载力;加固体系的极限承载能力较未加固前的板件理论极限承载能力提升了13.23倍,加固效果明显;加固体系在室内试验和数值分析中的最大位移及极限承载力相对误差分别为16.27%,0.1917%,采用填充混凝土弹塑性等效方法建立的数值模型能很好地模拟加固体系在极限状态时的承载力和变形;盖板厚度、填充混凝土强度和波纹钢波形是影响加固体系承载能力的关键参数,其中填充混凝土强度对加固体系承载力的影响幅度最大,其次是盖板厚度,而波纹钢波形的选取则需要兼顾波纹钢抗弯承载力与填充混凝土抗剪承载力之间的平衡。In order to probe into the mechanical properties of the reinforced concrete(RC)slab culvert rehabilitated with corrugated steel semi-circular arch,the method for mutual verification between laboratory test and numerical analysis is adopted.On the basis of proposing and verifying the numerical analysis method for the RC slab culvert rehabilitated with corrugated steel semi-circular arch based on elasto-plastic equivalence of grout,the major factors affecting the bearing capacity of the reinforcement system are analyzed.The result shows that(1)The system transformation of reinforced concrete culvert takes place after reinforcement,the slabs change from flexural members before reinforcement to composite members with arch effect after reinforcement,and the failure mode shifts from the flexural failure before reinforcement to the shear failure after reinforcement.The ultimate bearing capacity of the reinforcement system depends on the shear capacity of the RC slab,the shear bearing capacity of the filled concrete and the bending capacity of the corrugated steel.The bending capacity of the RC slab,which has limited effect on the reinforcement system,mainly plays its shear bearing capacity.(2)The ultimate carrying capacity of the reinforcement system is 13.23 times higher than the theoretical ultimate carrying capacity of the slab before the reinforcement,presenting obvious reinforcement effect.(3)The maximum displacement and relative error of the reinforcement system are 16.27%and 0.1917%respectively,and it is favorable to adopt the elastoplastic equivalent method for the filled concrete to establish numerical model to simulate the bearing capacity and deformation of the reinforcement system in the ultimate state.(4)Meanwhile,the slab thickness,filled concrete strength and corrugated steel waveform are the key parameters affecting the reinforcement system bearing capacity,among which the filled concrete strength,followed by the slab thickness,has the greatest influence on the bearing capacity of the reinforcement syste

关 键 词：桥梁工程 波纹钢加固 数值分析 钢筋混凝土盖板涵 弹塑性等效 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]