|本期目录/Table of Contents|

[1]刘 江,刘永健,房建宏,等.“上”形截面钢梁弯扭联合作用下整体稳定性分析[J].建筑科学与工程学报,2017,34(05):181-189.
　LIU Jiang,LIU Yong-jian,FANG Jian-hong,et al.Overall Stability Analysis of“上”-section Steel Girder Under Combined Bending and Torsion[J].Journal of Architecture and Civil Engineering,2017,34(05):181-189.
点击复制

“上”形截面钢梁弯扭联合作用下整体稳定性分析(PDF)
分享到：

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
34卷
期数:
2017年05期
页码:
181-189
栏目:
出版日期:
2017-09-22

文章信息/Info

Title:
Overall Stability Analysis of“上”-section Steel Girder Under Combined Bending and Torsion
作者:
刘 江，刘永健，房建宏，彭元诚
长安大学公路学院
Author(s):
LIU Jiang, LIU Yong-jian, FANG Jian-hong, PENG Yuan-cheng
School of Highway, Chang’an University
关键词:
桥梁工程; “上”形截面钢梁; 整体稳定性; 整体稳定系数; 偏跨比
Keywords:
bridge engineering;  “上”-section steel girder;  overall stability;  overall stability coefficient;  ratio of eccentricity and span
分类号:
-
DOI:
-
文献标志码:
A
摘要:
为对“上”形截面钢梁弯扭联合作用下的整体稳定性进行分析，采用有限元数值计算方法，通过失稳模态考虑构件L/1 000（L为跨径）的几何初始缺陷，对比已有文献试验结果，验证了模拟方法的正确性，在此基础上，对跨中集中荷载和满跨均布荷载作用下的简支“上”形截面钢梁整体稳定性进行分析，通过曲线拟合给出了“上”形截面钢梁整体稳定系数计算公式，分析了荷载偏心距和跨径对稳定承载力及弯扭效应分配的影响。研究结果表明：通过失稳模态考虑构件L/1 000几何缺陷可以准确地计算稳定承载力；“上”形截面钢梁整体稳定系数的取值较国标规范工字梁小，且均布荷载较集中荷载小；“上”形截面钢梁的稳定承载力随着偏心距和跨径的增加逐渐降低，且影响程度也逐渐变小；偏跨比较大时，失稳破坏主要由扭转效应引起，偏跨比较小时，则主要由弯曲效应引起；集中荷载较均布荷载更容易使“上”形截面钢梁失稳；使用《冷弯薄壁型钢结构技术规范》（GB 50018—2002）进行“上”形截面钢梁的整体稳定性验算会偏于不安全。
Abstract:
In order to analyze the overall stability of “上”-section steel girder under combined bending and torsion, finite element method was used and L/1 000 (L?was span) geometric imperfection was considered by buckling mode. Compared with experiment data of existing literature, the veracity was verified. On the basis above, stability of “上”-section steel girder under concentrated load on midspan and uniform load on full span were respectively analyzed. A formula of “上”-section steel girder overall stability coefficient was proposed by curve fitting, and the effects of load eccentricity and span on stability bearing capacity and proportion of bending and torsion were also analyzed. The study results indicate that stability bearing capacity can be accurately calculated by considering L/1 000 geometric imperfection through buckling mode. Overall stability coefficient of “上”-section steel girder was less than I-girder specified in China’s code for design of steel structures, which under uniform load is less than concentrated load. Stability bearing capacity of “上”-section steel girder reduces as the increasing of load eccentricity and span, and the degree of influence also reduces as well. Buckling failure is induced mainly by torsional effect in the large ratio of eccentricity and span, and is induced mainly by bending effect in the small ratio of eccentricity and span. It will be unsafe using Technical Code of Cold-formed Thin-wall Steel Structures (GB 50018—2002) to check the overall stability of “上”-section steel girder.

参考文献/References:

相似文献/References:

[1]刘荣桂,刘德鑫,延永东,等.CFRP筋复合型锚具锚固性能研究[J].建筑科学与工程学报,2013,30(02):9.
　LIU Rong-gui,LIU De-xin,YAN Yong-dong.[J].Journal of Architecture and Civil Engineering,2013,30(05):9.
[2].《建筑科学与工程学报》征稿简则[J].建筑科学与工程学报,2013,30(02):127.
[3]李加武,黄森华,王新.开口断面斜拉桥主梁动力特性的有限元简化计算[J].建筑科学与工程学报,2013,30(04):59.
　LI Jia-wu,HUANG Sen-hua,WANG Xin.Finite Element Simplified Computation for Dynamic Characteristics of Cable-stayed Bridge Girder with Opening Section[J].Journal of Architecture and Civil Engineering,2013,30(05):59.
[4]任 伟,盖轶婷,王 锦.混凝土自锚式悬索桥过程控制状态分析[J].建筑科学与工程学报,2014,31(03):45.
　REN Wei,GAI Yi-ting,WANG Jin.Analysis of Process Control State About Concrete Selfanchored Suspension Bridge[J].Journal of Architecture and Civil Engineering,2014,31(05):45.
[5]李加武,周 琴,黄森华.简支梁桥铅芯橡胶支座减震特性研究[J].建筑科学与工程学报,2014,31(03):124.
　LIU Xin-hua,LI Jia-wu,ZHOU Qin,et al.Research on Seismic Isolation Characteristics of LRB for Simply Supported Beam Bridge[J].Journal of Architecture and Civil Engineering,2014,31(05):124.
[6]韦建刚,黄 蕾,李佩元,等.旧空心板简支梁桥的连续化改造加固研究[J].建筑科学与工程学报,2014,31(04):103.
　WEI Jian-gang,HUANG Lei,LI Pei-yuan,et al.Research on Continuous Transformation and Reinforcement for Old Simply Supported Hollow Slab Bridge[J].Journal of Architecture and Civil Engineering,2014,31(05):103.
[7]周 帅,曾永平,杨国静,等.桥梁箱型吊杆涡振与驰振耦合振动的数值模拟[J].建筑科学与工程学报,2015,32(02):84.
　ZHOU Shuai,ZENG Yong-ping,YANG Guo-jing,et al.Numerical Simulation on Coupled Vibration of Vortex-induced Vibration and Galloping Vibration for Box Hangers of Bridges[J].Journal of Architecture and Civil Engineering,2015,32(05):84.
[8]赵士良,韩万水,鲁永飞,等.重载交通条件下装配式RC板桥抗裂性分析[J].建筑科学与工程学报,2015,32(04):73.
　ZHAO Shi-liang,HAN Wan-shui,LU Yong-fei,et al.Crack Resistance Analysis on Prefabricated RC Slab Bridge Under Heavy Traffic[J].Journal of Architecture and Civil Engineering,2015,32(05):73.
[9]贡金鑫,江力财,赵尚传,等.桥梁拉吊索用不锈钢钢丝腐蚀性能及斜拉索时变可靠度研究[J].建筑科学与工程学报,2015,32(05):8.
　GONG Jin-xin,JIANG Li-cai,ZHAO Shang-chuan,et al.Study on Corrosion Properties of Stainless Steel Wire for Cable Use and Time-variant Reliability of Stay Cable of Bridge[J].Journal of Architecture and Civil Engineering,2015,32(05):8.
[10]李立峰,刘守苗,吴文朋.氯离子侵蚀效应对RC桥墩抗震性能的影响[J].建筑科学与工程学报,2015,32(05):56.
　LI Li-feng,LIU Shou-miao,WU Wen-peng.Influence of Chloride Ion Corrosion on Seismic Performance of Reinforced Concrete Piers[J].Journal of Architecture and Civil Engineering,2015,32(05):56.

备注/Memo

备注/Memo:
更新日期/Last Update: 2017-09-11