摘要
为解决当前边坡反力结构存在的结构自重大和节点局压性能差的问题,设计一种内置核心筒的预制边坡反力结构,采用室内轴向局部压缩实验和有限元数值仿真分析对其破坏模式和承载能力进行研究.结果表明,结构裂隙先由局压区对角线向倒角处发育,再从倒角处从上至下斜向发育至梁端底部,为典型“楔劈”破坏模式.径厚比由36.7%下降至26.7%,结构极限承载力提升了2.3%.随着径厚比减小,结构承载能力略有提升.跨长1000 mm的结构局压面积比由2.151增至3.361,结构极限承载力降低31.5%.跨长600 mm的结构局压面积比由1.138增至1.778,结构极限承载力降低28.9%.结构承载能力随着局压面积比的增大而降低.
In order to solve the problems of heavy structural weight and poor local compression performance of joints in the current slope reaction structure,a prefabricated slope reaction structure with a built-in core tube is designed,the failure mode and bearing capacity were studied by indoor axial local compression test and finite element numerical simulation analysis.The results show that the structural cracks first develop from the diagonal of the local compression zone to the chamfer,and then develop obliquely from the chamfer to the bottom of the beam end,which is a typical“Wedge split-ting”failure mode.The diameter-thickness ratio decreases from 36.7% to 26.7%,the ultimate bearing capacity of the structure increases by 2.3%.With the decrease of the diameter-thickness ratio,the bearing capacity of the structure increases slightly.The local compression area ratio of the structure with a span of 1 m increases from 2.151 to 3.361,and the ultimate bearing capacity of the structure decreases by 31.5%.The local compression area ratio of the structure with 0.6 m span increases from 1.138 to 1.778,and the ultimate bearing capacity of the structure decreases by 28.9%.The bearing capacity of the structure decreases with the increase of the local compression area ratio.
作者
吴家盛
王浩
张景权
吴志刚
蔡晖
e tubeWU Jiasheng;WANG Hao;ZHANG Jingquan;WU Zhigang;CAI Hui(Zijin School of Geology and Mining,Fuzhou University,Fuzhou,Fujian 350108,China;Fujian Expressway Maintenance Engineering Co.,Ltd.,Fuzhou,Fujian 350109,China)
出处
《福州大学学报(自然科学版)》
北大核心
2026年第2期186-194,共9页
Journal of Fuzhou University(Natural Science Edition)
基金
福建省科技厅高校产学合作基金资助项目(2022Y4002)
福建省交通运输科技资助项目(202202)。
关键词
边坡反力结构
内置核心筒
预制
结构设计
承载性能
slope reaction structure
built-in core tube
prefabricated
structural design
bearing capacity
