玻璃纤维网格作为历史砖石结构的可持续增强材料

Fiberglass Grids as Sustainable Reinforcement of Historic Masonry.

作者信息

Righetti Luca, Edmondson Vikki, Corradi Marco, Borri Antonio

机构信息

Department of Mechanical and Construction Engineering, Northumbria University, 209 Wynne-Jones Building, Newcastle upon Tyne NE1 8ST, UK.

Department of Engineering, University of Perugia, 92 Via Duranti, Perugia 06125, Italy.

出版信息

Materials (Basel). 2016 Jul 21;9(7):603. doi: 10.3390/ma9070603.

DOI:10.3390/ma9070603

PMID:28773725

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5456868/

Abstract

Fiber-reinforced composite (FRP) materials have gained an increasing success, mostly for strengthening, retrofitting and repair of existing historic masonry structures and may cause a significant enhancement of the mechanical properties of the reinforced members. This article summarizes the results of previous experimental activities aimed at investigating the effectiveness of GFRP (Glass Fiber Reinforced Polymers) grids embedded into an inorganic mortar to reinforce historic masonry. The paper also presents innovative results on the relationship between the durability and the governing material properties of GFRP grids. Measurements of the tensile strength were made using specimens cut off from GFRP grids before and after ageing in aqueous solution. The tensile strength of a commercially available GFRP grid has been tested after up 450 days of storage in deionized water and NaCl solution. A degradation in tensile strength and Young's modulus up to 30.2% and 13.2% was recorded, respectively. This degradation indicated that extended storage in a wet environment may cause a decrease in the mechanical properties.

摘要

纤维增强复合材料（FRP）已越来越成功，主要用于既有历史砖石结构的加固、改造和修复，并且可能显著提高被加固构件的力学性能。本文总结了先前试验活动的结果，这些活动旨在研究嵌入无机砂浆中的玻璃纤维增强聚合物（GFRP）网格对历史砖石结构进行加固的有效性。本文还展示了关于GFRP网格耐久性与主要材料性能之间关系的创新性成果。在水溶液中老化前后，从GFRP网格上切割下来的试样用于测量拉伸强度。一种市售GFRP网格在去离子水和氯化钠溶液中储存长达450天后，对其拉伸强度进行了测试。结果分别记录到拉伸强度和杨氏模量下降了30.2%和13.2%。这种降解表明在潮湿环境中的长时间储存可能会导致力学性能下降。