摘要
设计了一种探究“管片–自密实混凝土(SCC)–钢管”叠合式衬砌结构横向力学行为与变形特性的大型足尺试验方法,初步揭示了叠合式衬砌结构在非均匀外载下的变形及力学响应规律;结合三维精细化有限元模型,探讨了栓钉布设、衬砌类型、侧压力系数等因素对结构承载机理的影响。结果表明:在非均匀外载作用下叠合式衬砌的环向应力相比分离式衬砌较小,变形呈现“横椭圆”模式,且随荷载非均匀性增加,其变形规律越显著;栓钉布设有效地增强了钢管–SCC的界面性能,但对结构环向应力影响甚微。
A full-scale mode test is proposed to study the transverse mechanical behaviors and deformation characteristics of segment-self compacted concrete(SCC)-steel superimposed linings.The deformation and mechanical response laws of composite lining structures under non-uniform external loads are revealed.Based on the 3D refined finite element model,the influences of studs,lining types and lateral pressure coefficient on the bearing capacity of the structures are discussed.The results show that the circumferential stress of the superimposed linings is lower than that of the separated ones under the action of non-uniform external loads,and the superimposed lining structures present a‘transverse ellipse’deformation,and the deformation laws are more clear with the increase of load amplitude and non-uniformity.The studs can effectively enhance the interface performance of steel-SCC,but they have few effects on the circumferential stress of the structures.
作者
李代茂
严振瑞
唐欣薇
莫键豪
黄鸿浩
刘庭金
LI Dai-mao;YAN Zhen-rui;TANG Xin-wei;MO Jian-hao;HUANG Hong-hao;LIU Ting-jin(Guangdong Yuehai Pearl River Delta Water Supply Co.,Ltd.,Guangzhou 511458,China;Guangdong Hydropower Planning and Design Institute,Guangzhou 510635,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2020年第12期2257-2263,共7页
Chinese Journal of Geotechnical Engineering
基金
广东省重点领域研发计划项目(2019B111108001)
珠江三角洲水资源配置工程课题研究(WW2018225)
中国水利水电科学研究院流域水循环模拟与调控国家重点试验室开放基金项目(IWHR-SKL-KF201818)。
关键词
输水隧洞
叠合式衬砌
足尺模型试验
横向性能
数值模拟
water-conveying tunnel
superimposed lining
full-scale model test
transverse performance
numerical simulation
