[1]卜良桃,肖礼瀚.二次受力下外包RPC加固钢柱偏压性能分析[J].深圳大学学报理工版,2021,38(4):400-407.[doi:10.3724/SP.J.1249.2021.04400]
 BU Liangtao and XIAO Lihan.Analysis of performance of eccentrically compressed steel columns reinforced by outsourcing RPC under secondary load[J].Journal of Shenzhen University Science and Engineering,2021,38(4):400-407.[doi:10.3724/SP.J.1249.2021.04400]
点击复制

二次受力下外包RPC加固钢柱偏压性能分析
分享到:

《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第38卷
期数:
2021年第4期
页码:
400-407
栏目:
土木建筑工程
出版日期:
2021-07-10

文章信息/Info

Title:
Analysis of performance of eccentrically compressed steel columns reinforced by outsourcing RPC under secondary load
文章编号:
202104010
作者:
卜良桃肖礼瀚
湖南大学土木工程学院,湖南长沙 410082
Author(s):
BU Liangtao and XIAO Lihan
College of Civil Engineering, Hunan University, Changsha 410082, Hunan Province, P.R.China
关键词:
结构工程二次受力活性粉末混凝土偏压钢柱加固承载力
Keywords:
structural engineeringsecondary loadreactive powder concreteeccentrically compressed steel columnreinforcementbearing capacity
分类号:
TU398.9;TU323.1
DOI:
10.3724/SP.J.1249.2021.04400
文献标志码:
A
摘要:
为研究超高性能混凝土对钢柱的加固效果,采用活性粉末混凝土(reactive powder concrete,RPC)对初始荷载作用下的6根足尺偏压钢柱进行外包加固,考虑初始荷载、偏心距和RPC强度对偏压钢柱受力性能的影响,进行二次受力偏压试验.试验结果表明:二次受力下采用RPC加固偏压钢柱能显著提高极限承载力、稳定性和刚度.RPC与型钢能够良好地协同工作,加固构件截面基本符合平截面假定.试件的极限承载力随着RPC强度增大而增大,随着始荷载和偏心距增大而减小.当型钢初始荷载与极限荷载比值为70%时,原构件承载力提升5倍左右. 基于破坏机理,给出了考虑RPC强度折减的极限承载力计算公式,可供实际加固工程参考.
Abstract:
In order to study the effect of ultra-high performance concrete on the steel column, we propose to use reactive powder concrete (RPC) to outsource and reinforce 6 full-scale eccentric steel columns under the initial load. Considering the influence of initial load, eccentricity, and RPC strength on the mechanical performance of eccentrically compressed steel columns, we carry out the secondary eccentric compression tests. The test results show that the use of RPC to reinforce the eccentrically compressed steel column under secondary load can significantly improve ultimate bearing capacity, stability and stiffness. RPC and section steel work well together, and the section of the reinforced members basically conforms to the assumption of a flat section. The ultimate bearing capacity of the specimen increases with the increase of RPC strength and decreases with the increase of initial load and eccentricity. When the ratio of initial load to limit load reaches 70%, the load capacity of the original member can still increase by about 5 times. Based on the failure mechanism and considering the RPC strength reduction, we derive the ultimate bearing capacity calculation formula, which can be used as a reference for actual reinforcement projects.

相似文献/References:

[1]朱美春,刘建新,王清湘.钢骨-方钢管高强混凝土柱的轴压比限值[J].深圳大学学报理工版,2010,27(1):95.
 ZHU Mei-chun,LIU Jian-xin,and WANG Qing-xiang.Axial load limit for square steel tubes filled with steel-reinforced high-strength concrete[J].Journal of Shenzhen University Science and Engineering,2010,27(4):95.
[2]周海俊,米红雨,谭也平.锈蚀-疲劳作用下的砼梁桥失效概率分析[J].深圳大学学报理工版,2010,27(1):109.
 ZHOU Hai-jun,MI Hong-yu,and TAN Ye-ping.Failure probability analysis of reinforced concrete bridges under coupled corrosion fatigue effects[J].Journal of Shenzhen University Science and Engineering,2010,27(4):109.
[3]白音,石永久,王元清.火灾中网架结构受力分析与设计方法[J].深圳大学学报理工版,2011,28(No.2(095-188)):113.
 BAI Yin,SHI Yong-jiu,and WANG Yuan-qing.Mechanical properties analysis and design method for grid structures under fire conditions[J].Journal of Shenzhen University Science and Engineering,2011,28(4):113.
[4]管民生,韩大建,杜宏彪,等.钢筋混凝土框架结构的抗震性能指标研究[J].深圳大学学报理工版,2011,28(No.3(189-282)):200.
 GUAN Min-sheng,HAN Da-jian,DU Hong-biao,et al.A new seismic performance index for reinforced concrete frame structures[J].Journal of Shenzhen University Science and Engineering,2011,28(4):200.
[5]蔡健,林焕彬,侯磊,等.带约束拉杆矩形钢管混凝土短柱延性分析[J].深圳大学学报理工版,2011,28(No.3(189-282)):213.
 CAI Jian,LIN Huan-bin,HOU Lei,et al.Analysis of ductility of rectangular concrete-filled steel tube stub columns with binding bars subjected to eccentric loading[J].Journal of Shenzhen University Science and Engineering,2011,28(4):213.
[6]方明霁,李国强,李一松.型钢混凝土中高剪力墙的抗震性能[J].深圳大学学报理工版,2012,29(No.1(001-094)):38.[doi:10.3724/SP.J.1249.2012.01038]
 FANG Ming-ji,LI Guo-qiang,and LI Yi-song.Seismic behavior of steel reinforced concrete mid-rise shear wall[J].Journal of Shenzhen University Science and Engineering,2012,29(4):38.[doi:10.3724/SP.J.1249.2012.01038]
[7]蔡健,梁伟盛,林辉.方钢管混凝土柱抗剪性能试验研究[J].深圳大学学报理工版,2012,29(No.3(189-282)):189.[doi:10.3724/SP.J.1249.2012.03189]
 CAI Jian,LIANG Wei-sheng,et al.Experimental study on shear resistance performance of concrete filled square steel tubular columns[J].Journal of Shenzhen University Science and Engineering,2012,29(4):189.[doi:10.3724/SP.J.1249.2012.03189]
[8]张成,吴慧,高博青,等.肋环型索穹顶结构的几何法施工及工程应用[J].深圳大学学报理工版,2012,29(No.3(189-282)):195.[doi:10.3724/SP.J.1249.2012.03195]
 ZHANG Cheng,WU Hui,GAO Bo-qing,et al.Geometry-based construction technique and application of Geiger type cable dome[J].Journal of Shenzhen University Science and Engineering,2012,29(4):195.[doi:10.3724/SP.J.1249.2012.03195]
[9]陆金钰,李娜,范圣刚.面向几何坐标的张拉整体结构找形算法[J].深圳大学学报理工版,2012,29(No.3(189-282)):211.[doi:10.3724/SP.J.1249.2012.03211]
 LU Jin-yu,LI Na,and FAN Sheng-gang.Geometry-oriented form-finding method for tensegrity[J].Journal of Shenzhen University Science and Engineering,2012,29(4):211.[doi:10.3724/SP.J.1249.2012.03211]
[10]傅学怡,徐娜.新型矩形钢管混凝土柱节点轴压传力机制研究[J].深圳大学学报理工版,2012,29(No.4(283-376)):283.[doi:10.3724/SP.J.1249.2012.04283]
 FU Xue-yi and XU Na.Research on axial compression force transmission mechanism of a new form of concrete-filled rectangular steel tube column joint[J].Journal of Shenzhen University Science and Engineering,2012,29(4):283.[doi:10.3724/SP.J.1249.2012.04283]

更新日期/Last Update: 2021-07-30