TRC加固RC梁在静载下的受弯性能  

Flexural Behavior of RC Beams Strengthened with TRC Under Static Loading

作　　者：尹世平[1,2] 盛杰[2] 吕恒林[1,2] 贾申[2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116

出　　处：《中国公路学报》2015年第1期45-53,共9页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(51478458;51108451);江苏省自然科学基金项目(BK2011220);中央高校基本科研业务费专项资金项目(2014QNA79);中国博士后科学基金项目(2014T70559;2012M511337);江苏省博士后基金项目(1102082C)

摘　　要：为进一步完善TRC加固受弯梁研究,考虑了加固方式、配筋率及损伤程度等因素对TRC材料加固RC梁的弯曲性能影响,采用四点弯曲加载的方式,对加固梁进行分级加载;分析了上述因素对加固梁的破坏模式、裂缝分布、承载力等方面的影响,并将TRC单面加固与CFRP加固效果进行了比较。结果表明:采用单面加固或U形加固,TRC加固都可以提高RC梁的承载力和改善裂缝形式,但单面加固对承载力的提高优于U形加固,而U形加固对梁总体性能的提高优于单面加固;配网率对低配筋率梁的极限承载力影响幅度高于配筋率较高的梁,TRC对不同损伤程度梁的承载力提高基本一致;TRC与CFRP加固的RC梁相比,TRC的荷载提高能力稍逊于CFRP,但延性和裂缝控制能力优于CFRP。To further improve the study of flexural beams strengthened with TRC, the influences of strengthening forms, reinforcement ratio, damage degree on the flexural behaviors of beams reinforced with textile-reinforced concrete （TRC） were considered. The four-point bend loading mode was adopted for the step loading procedure. The influences of these factors on failure mode, cracks distribution and hearing capacity were analyzed. Besides, the results of beams reinforced with TRC and those reinforced with CFRP were compared. The results show that TRC can improve the bearing capacity and cracks pattern of the RC beams for both kinds of strengthening forms, however the beams reinforced on bottom side have a better bearing capacity than those reinforced with U-shaped way, but the improvement of whole performance of beam reinforced with U-shaped is better. Moreover, the textile reinforcement ratio has a better enhance for beams with low reinforcement ratio than for the beams with high reinforcement ratio on the bearingcapacity. All the damaged beams have a similar bearing capacity improvement with TRC. In addition, for comparison of beams reinforced with TRC and CFRP, CFRP has a little better performance than TRC on bearing capacity, but TRC shows a better ductility capacity and crack control.

关 键 词：桥梁工程 RC梁 试验研究 TRC 破坏模式 裂缝 承载力 

分 类 号：U441[建筑科学—桥梁与隧道工程]