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《中国工程科学》 >> 2008年 第10卷 第8期

预应力FRP加固工程结构技术研究进展

武汉大学土木建筑工程学院,武汉430072

资助项目 :国家自然科学基金项目(50678136),湖北省青年杰出人才基金(2004ABB014) 收稿日期: 2006-10-17 发布日期: 2008-08-12 09:13:37.000

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摘要

围绕国内外预应力FRP加固技术的研究现状以及最新进展,从预应力FRP加固混凝土结构、预应力FRP加固钢结构、预应力FRP加固中关键技术的研究等方面进行了综述。试验研究表明:预应力FRP加固混凝土能显著提高构件的开裂荷载、屈服荷载和极限荷载,改善受弯构件在长期荷载的力学性能,提高构件的疲劳寿命;预应力CFRP加固钢梁后,其屈服荷载和极限荷载相对于对比梁都有明显的提高,其提高的程度随着预应力CFRP的用量和预应力水平的提高而增大;预应力CFRP加固对钢梁的刚度提高作用也比较明显,对低强度的钢材,提高效果更明显;采用预应力FRP加固工程结构的关键问题在于预应力的施加体系、预应力控制值、预应力损失和端部的锚固。

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