华侨大学叶勇--中文主页-- Flexural behavior of stone beams reinforced with prestressed NSM CFRP bars

叶勇(土木工程系副主任/创新团队党支部书记)

学位：工学博士学位
职称：教授

博士生导师

硕士生导师

学位：工学博士学位
办公地点：土木学科实验大楼505办公室
电子邮箱：
职务：土木工程系副主任/创新团队党支部书记

学科：结构工程

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Flexural behavior of stone beams reinforced with prestressed NSM CFRP bars

点击次数：

发表刊物：

Construction and Building Materials

摘要：

This paper is devoted to experimentally evaluate the efficiency of prestressed near surface mounted (NSM) carbon fiber reinforced polymer (CFRP) bars for reinforcing stone beams to improve their flexural performance. A total of nine stone beams, classified into three test sets (Set A, Set B, and Set C) according to the beam span and the cross-sectional dimensions, were reinforced with prestressed NSM CFRP bars and tested under monotonic loading. In each test set, one bare stone beam was also tested for comparison. In Set C, the reinforced stone beams were strengthened with CFRP-strip wrapping in the shear span to increase the shear capacity. The test parameters included the amount of NSM CFRP reinforcements and the prestressing force. It was found from the test results that the use of prestressed NSM CFRP bars shifted the failure of stone beams from abrupt fracture to a more ductile mode and the load capacity was significantly increased. Failure of the reinforced stone beams in Set A and Set B occurred either by slip of the CFRP reinforcement or CFRP debonding or flexural–shear failure. The reinforced stone beams with CFRP-strip wrapping in Set C failed in the flexural–shear mode accompanied by rupture of the CFRP strips. The load–deflection responses of the reinforced stone beams exhibited a three-stage behavior which was similar to that of the reinforced concrete (RC) beams. The CFRP-strip wrapping effectively enhanced the shear capacity of the reinforced stone beams and avoided the abrupt failure when the first crack occurred in the shear span. For the stone beams reinforced with a same amount of NSM CFRP reinforcements, the increase in the prestressing force resulted in an increase in the load capacity accompanied by a reduction in the deformation capacity when the failure was governed by CFRP debonding.

论文类型：

期刊论文

页面范围：

2014,54:466-476

是否译文：

否

收录刊物：

SCI

第一作者：

叶勇

合写作者：

刘阳,王兰

通讯作者：

郭子雄

附件：

Ye et al (2014)-Flexural behavior of stone beams reinforced with prestressed NSM CFRP bars.pdf

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个人简介

叶勇，博士，教授，博士生导师，入选福建省“闽江教育领军人才”闽江学者、华侨大学承志学者。现任华侨大学土木工程学院土木工程系副主任、现代组合结构和抗震防灾创新团队党支部(全国党建工作样板支部)书记。获评华侨大学“学生最喜爱的教师”。

从事结构工程方向的教学与研究工作。主持国家自然科学基金项目2项、福建省自然科学基金面上项目2项、中国博士后科学基金项目1项、福建省高校青年自然基金重点项目1项等科研项目；获福建省科技进步二等奖、泉州市自然科学三等奖、厦门市科技进步三等奖等；在国内外主流学术期刊及会议上发表论文100余篇，其中SCI、EI收录近60篇，1篇论文获英国土木工程师协会(ICE)年度出版奖。