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

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

Issue:
2020年03期
Page:
45-54
Research Field:
Publishing date:

Info

Title:
Numerical Simulation and Calculation Method of Hybrid Steel U-rib Stiffened Plate's Compression Overall Stability Bearing Capacity
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)
Keywords:
hybrid steel U-rib stiffened plate;  overall stability;  numerical simulation;  test verification;  bearing capacity
PACS:
TU311
DOI:
10.19815/j.jace.2019.04034
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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Last Update: 2020-06-08