高韧性树脂钢丝网混凝土侧面加固RC偏压柱试验研究
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摘要
为探究超强高韧性树脂钢丝网混凝土(HTRCS)加固技术对拱桥拱肋的加固效果,设计制作6根钢筋混凝土柱试件进行偏心受压试验,研究加固前、后钢筋混凝土柱在偏心压力作用下的裂缝发展、破坏形式、开裂荷载和承载力、荷载～侧向挠度曲线等,并分析加固层作用机理。结果表明:HTRCS加固不会改变钢筋混凝土偏心受压柱的破坏形态,但能有效地改善大偏心受压柱的裂缝发展形态;HTRCS加固能显著提高偏心受压柱的极限承载力和大偏心受压柱的抗裂性能,对于远轴侧加固的大偏心受压柱和近轴侧加固的小偏心受压柱,HTRCS加固效果最优;HTRCS加固能够提高偏心受压柱的刚度。
In order to study the reinforcement effect of high toughness resin concrete with steel mesh(HTRCS) on arch rib of arch bridge,we designed 6 reinforced concrete column specimens for eccentric compression tests.Meanwhile,we studied the crack development,failure mode,cracking load,bearing capacity,and load-lateral deflection curve of reinforced concrete columns before and after reinforcement under eccentric pressure,and analyzed the mechanism of reinforcement layer.The results show that HTRCS reinforcement will not change the failure mode of reinforced concrete eccentric compression columns,but it can effectively improve the crack development mode of large eccentric compression columns.HTRCS reinforcement can significantly improve the ultimate bearing capacity of eccentric compression columns and the crack resistance of large eccentric compression columns.The reinforcement of HTRCS is the most effective for the large compression eccentric column reinforced on the abaxial side(a side far from the axis)and the small eccentric compression column reinforced on the adaxial side(a side near the axis).HTRCS reinforcement can improve the stiffness of eccentric compression columns.
In order to study the reinforcement effect of high toughness resin concrete with steel mesh(HTRCS) on arch rib of arch bridge,we designed 6 reinforced concrete column specimens for eccentric compression tests.Meanwhile,we studied the crack development,failure mode,cracking load,bearing capacity,and load-lateral deflection curve of reinforced concrete columns before and after reinforcement under eccentric pressure,and analyzed the mechanism of reinforcement layer.The results show that HTRCS reinforcement will not change the failure mode of reinforced concrete eccentric compression columns,but it can effectively improve the crack development mode of large eccentric compression columns.HTRCS reinforcement can significantly improve the ultimate bearing capacity of eccentric compression columns and the crack resistance of large eccentric compression columns.The reinforcement of HTRCS is the most effective for the large compression eccentric column reinforced on the abaxial side(a side far from the axis)and the small eccentric compression column reinforced on the adaxial side(a side near the axis).HTRCS reinforcement can improve the stiffness of eccentric compression columns.
引文
[1]王鹏,袁计红,胡文华,等.钢筋混凝土简支T梁桥加固后承载性能试验研究[J].桥梁建设,2018,48(5):38-42.(WANG Peng,YUAN Ji-hong,HU Wen-hua,et al.Experimental Study on Load Bearing Capacity of Reinforced Concrete Simply-Supported T-Girder Bridge After Reinforcement[J].Bridge Construction,2018,48(5):38-42.in Chinese)
[2]李亚东,王崇交.中外桥梁长寿命化研究进展及其思考[J].桥梁建设,2019,49(2):17-23.(LI Ya-dong,WANG Chong-jiao.Research Advances in Long-Life of Worldwide Bridges and Corresponding Reflections[J].Bridge Construction,2019,49(2):17-23.in Chinese)
[3]《中国公路学报》编辑部.中国桥梁工程学术研究综述·2014[J].中国公路学报,2014,27(5):1-96.(Editorial Department of China Journal of Highway and Transport.Review on China′s Bridge Engineering Research:2014[J].China Journal of Highway and Transport,2014,27(5):1-96.in Chinese)
[4]周长东,马欣,张许,等.简支变连续法加固双T形铁路桥梁的力学性能[J].中南大学学报(自然科学版),2018,49(3):703-710.(ZHOU Chang-dong,MA Xin,ZHANG Xu,et al.Mechanical Properties of Double-T Railway Bridges by Transforming Simply Supported into Continuous System[J].Journal of Central South University(Science and Technology),2018,49(3):703-710.in Chinese)
[5]周建庭,谭兴丰,何寿奎,等.模糊层次分析方法在石拱桥加固方案优选中的应用研究[J].公路交通科技,2008,25(1):111-115.(ZHOU Jian-ting,TAN Xing-feng,HE Shou-kui,et al.Application of FAHP for Stone Arch Bridge Strengthening Scheme Optimization[J].Journal of Highway and Transportation Research and Development,2008,25(1):111-115.in Chinese)
[6]卢亦焱.纤维增强复合材料与钢材复合加固混凝土结构研究进展[J].建筑结构学报,2018,39(10):138-146.(LU Yi-yan.Research Advances in Hybrid Strengthening of Concrete Structures with FRP and Steel[J].Journal of Building Structures,2018,39(10):138-146.in Chinese)
[7]严猛.超强高韧性树脂钢丝网混凝土及预应力简支梁桥加固理论研究(博士学位论文)[D].成都:西南交通大学,2015.(YAN Meng.High Toughness Resin Concrete with Steel Wire Mesh and the Reinforcement Theoretical Research on Prestressed Concrete Simply Supported Plate Beam Bridge(Doctorate Dissertation)[D].Chengdu:Southwest Jioatong University,2015.in Chinese)
[8]蒲黔辉,谢宏伟,杨丁,等.高性能树脂混凝土钢丝网薄层加固RC偏压柱试验研究[J].工程科学与技术,2018,50(3):1-7.(PU Qian-hui,XIE Hong-wei,Yang Ding,et al.Experimental Study on RC Eccentric Compressive Column Strengthened by HTRCS[J].Advanced Engineering Sciences,2018,50(3):1-7.in Chinese)
[9]LIU De-jun,HUANG Hong-wei,YUE Qing-rui,et al.Behaviour of Tunnel Lining Strengthened by Textile-Reinforced Concrete[J].Structure and Infrastructure engineering,2016,12(8):964-976.
[10]卜良桃,鲁晨,朱健.水泥钢纤维砂浆钢筋网加固矩形RC偏压柱试验研究[J].湖南大学学报(自然科学版),2013,40(3):15-20.(BU Liang-tao,LU Chen,ZHU Jian.Experimental Study of RC Columns Strengthened with Steel Fiber Cement Mortar with Mesh Reinforcement Under Eccentric Loading[J].Journal of Hunan University(Natural Sciences),2013,40(3):15-20.in Chinese)
[11]薛亚东,刘德军,黄宏伟,等.纤维编织网增强混凝土侧面加固偏压短柱试验研究[J].工程力学,2014,31(3):228-236.(XUE Ya-dong,LIU De-jun,HUANG Hong-wei,et al.Experimental Study on Eccentric Compression Short Columns Strengthened by Textile-Reinforced Concrete on Side[J].Engineering Mechanics,2014,31(3):228-236.in Chinese)
[12]GB/T 50152-2012,混凝土结构试验方法标准[S].(GB/T 50152-2012,Standard for Test Method of Concrete Structures[S].)
[2]李亚东,王崇交.中外桥梁长寿命化研究进展及其思考[J].桥梁建设,2019,49(2):17-23.(LI Ya-dong,WANG Chong-jiao.Research Advances in Long-Life of Worldwide Bridges and Corresponding Reflections[J].Bridge Construction,2019,49(2):17-23.in Chinese)
[3]《中国公路学报》编辑部.中国桥梁工程学术研究综述·2014[J].中国公路学报,2014,27(5):1-96.(Editorial Department of China Journal of Highway and Transport.Review on China′s Bridge Engineering Research:2014[J].China Journal of Highway and Transport,2014,27(5):1-96.in Chinese)
[4]周长东,马欣,张许,等.简支变连续法加固双T形铁路桥梁的力学性能[J].中南大学学报(自然科学版),2018,49(3):703-710.(ZHOU Chang-dong,MA Xin,ZHANG Xu,et al.Mechanical Properties of Double-T Railway Bridges by Transforming Simply Supported into Continuous System[J].Journal of Central South University(Science and Technology),2018,49(3):703-710.in Chinese)
[5]周建庭,谭兴丰,何寿奎,等.模糊层次分析方法在石拱桥加固方案优选中的应用研究[J].公路交通科技,2008,25(1):111-115.(ZHOU Jian-ting,TAN Xing-feng,HE Shou-kui,et al.Application of FAHP for Stone Arch Bridge Strengthening Scheme Optimization[J].Journal of Highway and Transportation Research and Development,2008,25(1):111-115.in Chinese)
[6]卢亦焱.纤维增强复合材料与钢材复合加固混凝土结构研究进展[J].建筑结构学报,2018,39(10):138-146.(LU Yi-yan.Research Advances in Hybrid Strengthening of Concrete Structures with FRP and Steel[J].Journal of Building Structures,2018,39(10):138-146.in Chinese)
[7]严猛.超强高韧性树脂钢丝网混凝土及预应力简支梁桥加固理论研究(博士学位论文)[D].成都:西南交通大学,2015.(YAN Meng.High Toughness Resin Concrete with Steel Wire Mesh and the Reinforcement Theoretical Research on Prestressed Concrete Simply Supported Plate Beam Bridge(Doctorate Dissertation)[D].Chengdu:Southwest Jioatong University,2015.in Chinese)
[8]蒲黔辉,谢宏伟,杨丁,等.高性能树脂混凝土钢丝网薄层加固RC偏压柱试验研究[J].工程科学与技术,2018,50(3):1-7.(PU Qian-hui,XIE Hong-wei,Yang Ding,et al.Experimental Study on RC Eccentric Compressive Column Strengthened by HTRCS[J].Advanced Engineering Sciences,2018,50(3):1-7.in Chinese)
[9]LIU De-jun,HUANG Hong-wei,YUE Qing-rui,et al.Behaviour of Tunnel Lining Strengthened by Textile-Reinforced Concrete[J].Structure and Infrastructure engineering,2016,12(8):964-976.
[10]卜良桃,鲁晨,朱健.水泥钢纤维砂浆钢筋网加固矩形RC偏压柱试验研究[J].湖南大学学报(自然科学版),2013,40(3):15-20.(BU Liang-tao,LU Chen,ZHU Jian.Experimental Study of RC Columns Strengthened with Steel Fiber Cement Mortar with Mesh Reinforcement Under Eccentric Loading[J].Journal of Hunan University(Natural Sciences),2013,40(3):15-20.in Chinese)
[11]薛亚东,刘德军,黄宏伟,等.纤维编织网增强混凝土侧面加固偏压短柱试验研究[J].工程力学,2014,31(3):228-236.(XUE Ya-dong,LIU De-jun,HUANG Hong-wei,et al.Experimental Study on Eccentric Compression Short Columns Strengthened by Textile-Reinforced Concrete on Side[J].Engineering Mechanics,2014,31(3):228-236.in Chinese)
[12]GB/T 50152-2012,混凝土结构试验方法标准[S].(GB/T 50152-2012,Standard for Test Method of Concrete Structures[S].)