内配格构式钢骨钢管混凝土构件的抗弯性能研究
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西安建筑科技大学土木学院

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中图分类号:

TU391

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Study on the bending behavior of concrete-filled steel tube members with reinforcing lattice angle
Author:
Affiliation:

1.Xi’an University of Architecture &2.Technology

Fund Project:

The National Science Fund for Distinguished Young Scholars;The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    对是否设置加劲肋和格构式钢骨等4组内部不同构造形式的钢管混凝土试件进行受弯试验。试验结果表明:格构式钢骨延缓了试件受拉区混凝土开裂和受压区钢管屈服,有效提高了其抗弯性能。采用有限元软件ABAQUS对试验试件进行了数值模拟分析,有限元模拟结果与试验结果吻合较好。在此基础上分析了钢管径厚比、钢骨肢件间距、钢骨尺寸、钢骨及混凝土强度等对内配格构式钢骨钢管混凝土构件受弯性能的影响。结果表明:影响构件抗弯性能的主要参数为钢管径厚比、钢骨尺寸及钢骨强度;混凝土强度、钢骨肢件间距对其承载性能影响较小。采用中国规范、美国及欧洲规范对试件的抗弯承载力和刚度进行计算,并将计算结果与试验结果进行对比。结果表明:中国规范对该类构件抗弯承载力的计算偏于保守,对抗弯刚度的计算误差较大;美国和欧洲规范对该类构件抗弯刚度的计算偏于保守。

    Abstract:

    Four groups of concrete-filled steel tube specimens with different internal structure forms such as setting stiffening ribs and reinforcing lattice angles were tested. The test results show that the inserted reinforcing lattice angle can delay concrete cracking in tensile zone and steel tube yielding in compression zone, and improve its bending behavior effectively. ABAQUS is used to simulate the test specimen, and the finite element results are in good agreement with the test results. On this basis, the influence of the steel tube diameter to thickness ratio, steel-reinforced limb spacing, steel-reinforced size, steel-reinforced strength, concrete strength on the bending behavior of the members were analyzed. The results show that the main parameters that affect the bending behavior of members are the steel tube diameter to thickness ratio, steel-reinforced size, steel-reinforced strength, concrete strength and steel-reinforced limb spacing have little influence on its bending bearing capacity. The bending bearing capacity and flexural rigidity of specimens are calculated by using Chinese, US and Europe codes, and the calculated results are compared with the test results. The results show that the calculation of bending bearing capacity is conservative, and the calculation of flexural rigidity is conservative by using US and Europe codes.

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历史
  • 收稿日期:2020-08-24
  • 最后修改日期:2020-11-27
  • 录用日期:2021-01-04
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