15-王利民——CFRP修复钢筋混凝土梁的加载实验分析.pdfVIP

CFRP 修复钢筋混凝土梁的加载实验分析 1，2 2 2 1 2 2 2 王利民 ，刘顶平 ，张众 ，王东旭 ，张东焕 ，刘建平 ，李勇 （1. 青岛理工大学 理学院，山东青岛266033；2山东理工大学 交通与建工学院， 山东淄博 255049） 摘要：先进纤维强化板复合在混凝土结构上，会不同程度的提高其抗载荷和变形能力。实验用原结构长度 宽度高度尺寸为 1800mm×120mm×200mm 的钢筋混凝土梁。加载破坏后，用碳纤维布粘贴在该弯曲梁受拉 伸的底面和靠近端部的侧面上，形成 CFRP 加固的复合梁。将修复梁安装在实验机上再次加载，同时在该 梁的底面与侧面布上应变片，以测试梁局部随加载过程的变形。实验表明 CFRP 加固梁比未加固梁的承载 能力有显著提高，加固梁的抗变形能力也提高明显。较高的配钢筋箍率混凝土结构，其 FRP 修复的加固效 果也比较好。 关键词：钢筋混凝土梁；FRP 加固结构；弯曲梁加载实验；失效机理 Analysis on the loading experiment of reinforced concrete composite beam with CFRP 1，2 2 2 1 2 2 2 Wang Limin ， Liu D P , Zhang Z , Wang D , Zhang D ， Liu J ， Li Y (1. Science school of Qingdao Technological University， QingDao Shandong 266033，P R China； 2. School of Traffic and Constructional Engineering of Shandong University of Technology, Zibo Shandong 255049, China ） ABSTRACT ：In order to investigate the strengthening effect of advanced fiber composite plate on concrete structure, reinforced concrete beams had been loaded to the load of its failure, and their original structure sizes are respectively for 1800 mm x 120 mm x 200 mm. Carbon fiber cloth were pasted on the bottom of beam subject to tension and on the position being close to the beam sides, so composite beams are formed in this way. The repaired concrete beams, with Carbon Fiber Reinforced Plate, were installed in experiment equipment for loading again, while some strain gages were pasted on the bottoms and sides of beams at the same time, in order to measure the deformation of CFRP composite beam. Experimental result shows that the bearing capacity of beams reinforced with CFRP have increased more than that of beams without CFRP from dozens to several hundreds perc