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首页> 外文会议>6th International conference on advanced composite materials in bridges and structures 2012 >EFFECTIVENESS AND FEASIBILITY OF SFRP VERSUS CFRP SHEETS TO CONFINE CONCRETE CYLINDERS
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EFFECTIVENESS AND FEASIBILITY OF SFRP VERSUS CFRP SHEETS TO CONFINE CONCRETE CYLINDERS

机译：SFRP与CFRP板对约束混凝土圆筒的有效性和可行性

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摘要

A new type of Fibre Reinforced Polymer (FRP) sheet has been introduced in concrete strengthening applications, which consists of Steel FRP (SFRP) as the reinforcing material. Thus, it is important to examine the behaviour of SFRP sheets for confining concrete columns and compare the performance to commonly used Carbon FRP (CFRP) sheet. In this study, plain concrete cylinders (150x300mm) were wrapped with CFRP and SFRP sheets. The experimental program included nine cylinders divided into three groups. The first group consisted of three control unwrapped cylinders, the second group consisted of three cylinders wrapped with CFRP sheets and the third group consisted of three cylinders wrapped with SFRP sheets. Two types of instrumentation were used, conventional foil strain gauges and Digital Image Correlation Technique (DICT). The DICT is a new method to measure strains from the surface of FRP confined concrete. Thus, DICT was implemented to present the hoop strain variations across the height of FRP wrapped concrete cylinders in order to provide a better understanding of the FRP confined concrete behaviour. This paper also presented the enhancement in terms of the stress-strain behaviour, axial strength, axial strain, hoop strain, dilation, and strain efficiency of CFRP and SFRP wrapped concrete cylinders. The results showed that the overall performance of the concrete cylinders wrapped with SFRP sheet were superior to the cylinders wrapped with the conventionally used CFRP sheet.
机译：一种新型的纤维增强聚合物（FRP）薄板已被引入到混凝土加固应用中，其中包括钢FRP（SFRP）作为增强材料。因此，重要的是检查用于限制混凝土柱的SFRP板的性能，并将其性能与常用的碳FRP（CFRP）板进行比较。在这项研究中，普通混凝土圆柱体（150x300mm）用CFRP和SFRP板包裹。实验程序包括九个气缸，分为三个组。第一组由三个控制展开的滚筒组成，第二组由三个包裹有CFRP薄片的滚筒组成，第三组由三个包裹有SFRP薄片的滚筒组成。使用了两种类型的仪器，传统的箔片应变仪和数字图像相关技术（DICT）。 DICT是一种测量FRP约束混凝土表面应变的新方法。因此，采用DICT来表示在FRP包裹的混凝土圆柱体的整个高度上的环向应变变化，以便更好地了解FRP约束的混凝土行为。本文还介绍了CFRP和SFRP包裹混凝土圆筒在应力应变特性，轴向强度，轴向应变，环向应变，膨胀和应变效率方面的增强。结果表明，用SFRP板包裹的混凝土圆筒的整体性能优于常规用CFRP板包裹的圆筒。

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