Concrete confinement with a cement based high strength composite material
Concrete confinement with a cement based high strength composite material
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DOI：
10.1016/j.compstruct.2013.10.037
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发表时间：
2014-03
影响因子：
6.3
通讯作者：
L. Ombres
中科院分区：
文献类型：
--
作者：
L. Ombres
本文从理论和试验两方面分析了PBO纤维网包裹无机稳定水泥基材料(纤维增强水泥砂浆)的素混凝土构件的性能。本文的目的是(I)评价PBO-FRCM系统加固混凝土的约束效果，以及(Ii)定义能够表征PBO-FRCM约束混凝土的应力-应变响应的解析关系。然后，利用试验结果将试验结果与为分析约束混凝土构件而提出的一些准则和理论模型的预测结果进行比较。提出了一个简单的半经验模型来预测PBO-FRCM约束混凝土的轴向峰值强度和相应的轴向应变。
The performances of plain concrete elements wrapped with PBO (short of Polypara-phenylene-benzo-bisthiazole) fiber meshes embedded into an inorganic stabilized cementitious matrix (Fiber Reinforced Cementitious Mortar, FRCM) are analyzed, both theoretically and experimentally, in the paper. The aims of the paper are (i) to evaluate the effectiveness of the confinement of the concrete strengthened with the PBO-FRCM system, and, (ii) to define analytical relationships able to characterize the stress–strain response of the PBO-FRCM confined concrete.An experimental investigation, carried out on cylindrical specimens confined with the PBO-FRCM system, varying the fibers reinforcement ratio, the fibers orientation and the compressive concrete strength, is described. Results of tests are, then, utilized to compare experimental results against predictions both of some guidelines and theoretical models proposed for the analysis of confined concrete elements. Results of the comparison were presented and discussed in the paper.A simple semi-empirical model to predict axial peak strength and associated axial strain in PBO-FRCM confined concrete is also proposed.