[1]李斐然.超宽“321”型装配式公路钢桥的第二类稳定性研究[J].郑州大学学报(工学版),2015,36(04):92-95.[doi:10.3969/ j.issn.1671 - 6833.2015.04.021]
　LI Fei-ran.Second Stability Study of Super Wide“321”Prefabricated Highway Steel Bridge[J].Journal of Zhengzhou University (Engineering Science),2015,36(04):92-95.[doi:10.3969/ j.issn.1671 - 6833.2015.04.021]
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超宽“321”型装配式公路钢桥的第二类稳定性研究()
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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04期
页码:
92-95
栏目:
出版日期:
2015-08-31

文章信息/Info

Title:
Second Stability Study of Super Wide“321”Prefabricated Highway Steel Bridge
作者:
李斐然
河南省交通规划勘察设计院有限责任公司，河南郑州450052
Author(s):
LI Fei-ran
Henan Provincial Communications Planning Survery and Design Institute CO., LTD. ,Zhengzhou 450052,China
关键词:
“321”型装配式公路钢桥; 大横梁; 超宽; 承载力; 设计
Keywords:
“321”prefabricated highway steel bridge ;  large scale transverse beam;  super wide;  bearing ca-pacity ;  design
分类号:
U442.5
DOI:
10.3969/ j.issn.1671 - 6833.2015.04.021
文献标志码:
A
摘要:
以新型超宽“321”型装配式公路钢桥为研究对象,采用考虑材料非线性的有限元法,基于多级收敛准则研究超宽装配式公路钢桥的第二类稳定性.研究结果表明:超宽装配式公路钢桥的第二类稳定系数偏小,结构偏于不安全;在跨中增加一个支点后稳定系数得到大幅度提高,但应避免在非支撑杆位置增设中支点,以避免局部先于整体屈服;对于准则Ⅰ与准则Ⅱ在3个支点数量以内时稳定系数几乎呈线性增加,但对于准则Ⅲ在跨中支点增加到两个以上后不再显著提高,即在实际应用中支点数量增加到两个以上后不能再提高第二类稳定系数.
Abstract:
Based on material nonlinear FEM and multi-convergence criterions,the new super wide " 321" pre-fabricated highway steel bridge was studied. The results show that the second stability coefficient of the extrawide "321" prefabricated highway steel bridge is small,which means the structure is not safe. The secondstability coefficient will be greatly improved, when a support is set at the mid-span. To avoid the local yieldprecedes the whole,the support should be set at the studdle position. The second stability coefficient is almostlinear increase within three supports by criterion [ and ll,but under criterion Ⅲ it does not significantly in-creased when the mid-span supports above two. ln application,the second stability coefficients will not in-crease when the number of mid-span supports is above two.
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