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Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aluminum alloy surface was treated through three different processes. The bonding strength of GFRP-aluminum under hygrothermal environment with different surface treatments was tested and was arranged with the order of anodizing > silane coupling agent > sand blasting. The effects of hygrothermal environment and surface treatment on repair effects were also studied by tensile tests of GFRP and GFRP reinforced aluminum. The results show that the tensile strength, elastic modulus and break elongation of GFRP decrease after wet and heat treatments. After different surface treatments, the initial loads of repaired specimens increase with the order of anodizing > silane coupling agent > sand blasting. The bearing capacities of the specimens repaired by different surface treatments are reduced to different degrees under hygrothermal environment. For sand blasting specimen, the declining of bonding strength of the resin-aluminum is the main cause of the declining of bearing capacity, and damage mainly occurs in the interface. For the silane coupling agent and anodic specimen, damage occurs mainly in the resin-GFRP interface, the mechanical property of resin-aluminum interface is better than that of resin-GFRP.

The heat transfer performance of square tube reinforced GFRP sandwich roof panel in hot-summer and cold-winter area was investigated. Based on the structural characteristics and the equivalent heat transfer theory of sandwich panel, the calculation formula of heat transfer coefficient was proposed for the sandwich panel. The thermal properties of four kinds of square tube reinforced sandwich panels of unfilled material, glass wool, extruded polystyrene board and polyurethane were investigated by steady-state heat transfer protection hot box test. The results show that the theoretical calculation results of heat transfer coefficient of the square tube reinforced sandwich panels are close to the experimental results and can be used for the calculation of heat transfer coefficient of similar structures in engineering. The heat transfer coefficients of the square tube reinforced GFRP sandwich panels filled with three kinds of filler materials of glass cotton, extruded polystyrene board and polyurethane foam board are respective 0.553, 0.471 and 0.377 W·m-2·K-1, and which can meet the requirements of design standard for energy efficiency of public buildings（GB 50189—2015）for thermal performance of roof panel in hot-summer and cold-winter area. The thermal bridge effect of square tube reinforced GFRP sandwich panels filled with polyurethane foam board is the least, which is more suitable for building roof panels. [ABSTRACT FROM AUTHOR]

Copyright of Ordnance Industry Automation is the property of Editorial Board for Ordnance Industry Automation and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aiming at the technical problem of insufficient horizontal bearing capacity of pipe pile, compositely reinforced with GFRP prestressed concrete pipe pile (hereinafter referred to as PRC-G pile) was developed . The flexural properties of innovatively developed compositely reinforced with GFRP prestressed concrete pipe pile were studied through a comprehensive field test program. The results show that GFRP can evidently improve the flexural properties. The cracking bending moment and the ultimate bending moment of PRC-G piles are all increased to different extent. Cracking is of shorter distribution, less number and short in length. Furthermore, the strain of mid-span cross section is in accordance with the hypothesis of planar section until the concrete cracks. Concrete compression zone is broken in PRC-G piles and tendons of PRC piles are pulled off at failure. The shearing test results show that GFRP can improve the shear properties and the cracking shear force can be improved significantly. Two types of pipe piles failure process are similar, cracking from bearing and extending to the loading point of vertical surface in approximately 30 degrees direction, finally forming through surface of pipe piles. The experimental results show that glass fiber reinforced bar and PRC-G can improve the flexural and shear properties in different degrees, and it can effectively solve the technical problem of ordinary pipe pile's horizontal bearing capacity shortage. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)