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

卷:

37卷

期数:

2020年03期

页码:

45-54

栏目:

出版日期:

2020-05-30

文章信息/Info

Title:

Numerical Simulation and Calculation Method of Hybrid Steel U-rib Stiffened Plate's Compression Overall Stability Bearing Capacity

文章编号:

1673-2049(2020)03-0045-10

作者:

赵 秋¹,张骏超¹,林 楚¹,翟战胜²

(1. 福州大学 土木工程学院,福建 福州 350116; 2. 湖州市交通规划设计院,浙江 湖州 313000)

Author(s):

ZHAO Qiu¹, ZHANG Jun-chao¹, LIN Chu¹, ZHAI Zhan-sheng²

(1. College of Civil Engineering, Fuzhou University, Fuzhou 350116, Fujian, China; 2. Huzhou Traffic & Plan Design Institute, Huzhou 313000, Zhejiang, China)

关键词:

混合钢U肋加劲板;  整体稳定;  数值模拟;  试验验证;  承载力

Keywords:

hybrid steel U-rib stiffened plate;  overall stability;  numerical simulation;  test verification;  bearing capacity

分类号:

TU311

DOI:

10.19815/j.jace.2019.04034

文献标志码:

A

摘要:

建立受压混合钢U肋加劲板梁单元有限元模型并进行整体稳定分析,通过在梁单元模型中施加等效应力模拟U肋和被加劲板的不同强度,以5种不同强度组合的U肋加劲板试验试件的破坏模式和荷载-位移曲线对数值模拟方法进行验证。采用经试验验证的有限元模型,变化U肋高度、U肋与被加劲板强度与厚度、构件长度,得到混合钢U肋加劲板整体稳定系数,并与各国规范的柱曲线进行比较。结果表明:在压力荷载作用下,由于非等强钢U肋加劲板中钢材强度较低部分较早达到屈服,这将使得构件整体偏心受压,从而导致构件整体稳定系数均小于1; 等强钢M345-U345柱子曲线位于JTG D64—2015中的a,b类柱子曲线之间,并随着相对长细比的增大逐渐向b类柱子曲线靠近; 非等强钢柱子曲线在相对长细比较小时均低于等强钢M345-U345柱子曲线,而在相对长细比较大时的走势基本一致,其中M345-U420和M420-U345两条柱子曲线与JTG D64—2015中的b类柱子曲线接近; M345-U390和M390-U345两种柱子曲线随着相对长细比的增大逐步与等强钢M345-U345柱子曲线重合接近。

Abstract:

The beam element finite element model of hybrid steel U-rib stiffened plate was established for the overall stability analysis. By applying equivalent stress in beam element model to simulate the different strength of U-rib and stiffened plate, the numerical simulation method was verified by the failure mode and load-displacement curves of five different strength combinations of U-rib stiffened plate test specimens. By using the finite element model verified by experiments, changing U-rib height, strength and thickness of U-rib and stiffened plate, and component length, the overall stability coefficient of the hybrid steel U-rib stiffened plate was obtained, and compared with the column curves of the national codes. The results show that under the action of pressure load, because the lower part of steel strength in the unequal strength steel U-rib stiffened plate reaches yield earlier, it will make the whole component eccentrically compressed, resulting in the overall stability coefficient of the component less than 1. The equal strength steel M345-U345 column curve is located between the class a and class b column curves in JTG D64—2015, and gradually approaches the class b column curve with the increase of the relative slenderness ratio. The curve of unequal strength steel column is lower than that of equal strength steel M345-U345 column when the relative slenderness ratio is small, and the trend is basically the same when the relative slenderness ratio is large, and the M345-U420 and M420-U345 column curves are close to those of class b column curves in JTG D64—2015. The curves of M345-U390 and M390-U345 columns coincide with those of M345-U345 column curve with increasing slenderness ratio.

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[2]赵 秋,陈 鹏,林志平,等.板肋加劲板整体稳定数值模拟与受力机理研究[J].建筑科学与工程学报,2022,39(06):64.[doi:10.19815/j.jace.2021.08087]
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备注/Memo

备注/Memo:

收稿日期:2019-08-11
基金项目:国家自然科学基金项目(51478120)
作者简介:赵 秋(1976-),男,吉林通榆人,教授,工学博士,E-mail:zhaoqiu@fzu.edu.cn。

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更新日期/Last Update: 2020-06-08