文献类型：期刊文献

英文题名：Estimation of reinforcing effects of FRP-PCM method on degraded tunnel linings

作者：Jiang, Yujing[1,3,4];Wang, Xiaoshan[1,2];Li, Bo[5];Higashi, Yukihiro[6];Taniguchi, Kenshi[7];Ishida, Kosei[8]

机构：[1]Nagasaki Univ, Grad Sch Engn, Nagasaki 8528521, Japan;[2]Qingdao Univ Technol, Qingdao 266033, Peoples R China;[3]Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China;[4]Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China;[5]Shaoxing Univ, Rock Mech & Geohazards Ctr, Shaoxing 312000, Peoples R China;[6]Geosci Res Lab Co, Kanagawa, Japan;[7]Nippon Steel & Sumikin Mat Co, Tokyo, Japan;[8]Reliable Mat & Technol, Kyoto, Japan

年份：2017

卷号：57

期号：3

起止页码：327

外文期刊名：SOILS AND FOUNDATIONS

收录：SCI-EXPANDED(收录号：WOS:000405183200002)、、EI(收录号：20172203719676)、Scopus(收录号：2-s2.0-85019700682)、WOS

基金：This study was supported by the Research Society of FRP Grid Construction, Eight-Japan Engineering Consultants Inc. and Grant-in-Aid for Challenging Exploratory Research, Japan (No. 26630205), the Ministry of Education, Culture, Sports, and Science & Technology in Japan, National Natural Science Foundation of China, China (No. 51379117), and National Youth Foundation of China, China (No. 51609136). Their support is gratefully acknowledged.

语种：英文

外文关键词：Degraded tunnel lining; FRP-PCM method; Direct shear test; Bending test; Numerical simulation

外文摘要：Fiber-reinforced plastic (FRP) is a practical alternative construction material that has been extensively adopted in the reinforcement of concrete structures. The reinforcing effect of FRP grids needs to be quantitatively estimated when the grids are applied to degraded tunnel linings to assist with the maintenance design. In the present study, the reinforcing effect of FRP grids embedded in Polymer Cement Mortar (PCM) shotcrete (the FRP-PCM method) on degraded tunnels was estimated. Laboratory direct shear tests and bending tests were carried out on specimens reinforced with various grades of FRP grids to obtain the mechanical properties of the bonding surfaces between the PCM and the concrete reinforced by FRP grids. The bending test results showed that the bearing capacity of beams reinforced by FRP grids subjected to bending loads improved by around 40%. A numerical modeling of the reinforced tunnels by the FRP-PCM method was performed using the properties obtained from these laboratory tests to investigate the reinforcing performance of the FRP-PCM method on degraded tunnel linings. Numerical models with different loosening pressures acting on the tunnel lining, ground classes, degrees of lining deterioration, and degrees of tunnel health were considered, and the suitable conditions under which the application of the FRP-PCM method could effectively reinforce tunnel linings were proposed. (C) 2017 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY-NC-ND license.