纤维编织网增强混凝土侧面加固偏压短柱试验研究  

EXPERIMENTAL STUDY ON ECCENTRIC COMPRESSION SHORT COLUMNS STRENGTHENED BY TEXTILE-REINFORCED CONCRETE ON SIDE

作　　者：薛亚东[1,2] 刘德军[1,2] 黄宏伟[1,2] 王明卓[1,2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《工程力学》2014年第3期228-236,共9页Engineering Mechanics

基　　金：国家重点基础研究发展规划(973)项目(2011CB013800);长江学者和创新团队发展计划项目(IRT1029);国家自然科学基金项目(41072206);贵州省交通厅科技项目(2010-122-010;2010-122-019)

摘　　要：纤维编织网增强混凝土具有耐腐蚀、耐高温、限裂效果好、施工便捷、几乎不增加结构尺寸等突出性能而逐渐成为近期研究的热点。开展TRC侧面加固偏压短柱试验,探讨偏心距、前期受力历史和纤维编织网用量对加固效果的影响。试验结果表明:TRC侧面加固方法适合于大偏心受压结构,偏心距越大,增强效果越明显;结构前期受力历史对加固效果影响非常明显,随着前期历史载荷的增大,加固效果明显减弱;提高纤维编织网用量在一定程度上可以增强加固效果,但增强幅度随用量的增加呈现出减弱趋势。在室内试验与相关研究成果的基础上,提出了纤维编织增强混凝土侧面加固偏压短柱极限承载力计算方法,计算值与试验值吻合较好。Textile-reinforced concrete has gained increasing popularity due to its favourable properties, namely corrosion resistance, anti-high temperature, better ability in anti-crack, ease and speed application and minimal change in geometry. The eccentric compression experiments of short columns strengthened by TRC on side were conducted under mainly different parameters, specifically in eccentricity, the load history and numbers of fibre sheet layers. The experimental results show that： the method strengthened by TRC on side is suitable for the big eccentricity column and the strengthen effect shows increasingly powerful with eccentricity; load history is harmful to strengthen effect, and the strengthen effect decreases while the load history increases; It is useful to increase strengthen effect by adding fibre sheet layers in some extend, but it shows decreasing trend. Finally, based on the related existing study and test data, the formula of calculating ultimate bearing capacity is proposed, and it shows a satisfactory a^reement between the calculated and the experimental results.

关 键 词：纤维编织网增强混凝土(TRC) 偏心距 前期受力历史 纤维编织网层数 极限承载力 

分 类 号：TU375.1[建筑科学—结构工程] TU528.572