[1]李晶晶,张擎.水泥混凝土路面纵缝拉杆传荷试验研究[J].郑州大学学报(工学版),2015,36(06):119.[doi:10.3969/j. issn.1671 -6833.2015.06.024]
　CHEN Lirong,CHEN Baochun.Analysis of Out-of-plane Stability of Standard Concrete-filledSteel Tube Dumbbell-shaped Rib Arch[J].Journal of Zhengzhou University (Engineering Science),2015,36(06):119.[doi:10.3969/j. issn.1671 -6833.2015.06.024]
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水泥混凝土路面纵缝拉杆传荷试验研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
36
期数:
2015年06期
页码:
119
栏目:
出版日期:
2015-12-25

文章信息/Info

Title:
Analysis of Out-of-plane Stability of Standard Concrete-filledSteel Tube Dumbbell-shaped Rib Arch
作者:
李晶晶; 张擎
1.陕西交通职业技术学院公路工程系,陕西西安710018;2.长安大学公路学院,陕西西安710064
Author(s):
CHEN Lirong1; 2; CHEN Baochun1
1.College of Civil Engineering，FuzhouUniversity，Fuzhou 350108，China; 2.Fujian Communications Planning and Design In-stitute，Fuzhou 350008，China
关键词:
道路工程; 水泥混凝土路面; 接缝传荷系数; 弯曲疲劳; 拉杆
Keywords:
concrete-illed steel tubular ( CFST);  dumbbell-shaped; standard arch; out-of-plane stability; parameter analysis
分类号:
U416.222
DOI:
10.3969/j. issn.1671 -6833.2015.06.024
文献标志码:
A
摘要:
在分析重复荷载作用下接缝工作机理的基础上,通过弯曲疲劳试验,研究不同板厚、拉杆长度和拉杆直径等条件下水泥混凝土路面纵缝拉杆传荷能力.结果表明:纵缝传荷系数的变化在荷载作用50万次前后大致分为快速下降阶段和保持阶段;纵缝传荷系数随着拉杆直径和拉杆长度的增加而增大,但增幅不足9%;纵缝传荷系数随着板厚的增加而降低,幅度约为8%;结合现行规范对于旧水泥混凝土路面接缝传荷能力等级的评定,表明在试验模拟的工况下，荷载作用50万次后纵缝传荷系数保持值均在80%以上,具有优良的传荷能力.
Abstract:
Information of concrete-filled steel tube ( CFST)dumbbell shaped rib arch bridge was investigated.Main influencing factors of out-of-plane stability of this kind of arch bridge were statistically analyzed. Astandard dumbbell-shaped rib arch which could be representatively in accordance with engineering practice wasbuilt by referring to real bridges. The parameter analysis was conducted on this standard arch. The resultsshow that coefficient of elastic stability increases firstly and then decreases while the rise-span ratio increases.When the rise-span ratio is in the range from 0. 22 to 0.25,the coefficient of elastic stability of dumbbell-shaped arch bridge reaches the peak. The influence of the width-span ratio of arch is similar to the rise-spanratio. Brace form not only affects the stability coefficient of arch,but also affects the out-of-plane instabilitymode. The top brace has greater effect on elastic stability than side braces. Enlarging the diameter of steelpipe can effectively improve the out-of-plane stability of dumbbell-shaped arch,but enlarging the sectionheight of arch rib could only slightly improve the out-of-plane stability. Then coefficient of elastic stability ofarch will enlarge with the increase of deck stiffness, but there is a reasonable value interval of deck stiffness.While exceeding this interval,the coefficient increases slowly.

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