Bending Capacity Calculation of Steel Reinfoned Concrete Composite Beams Considering Axial Force

XU Qiyan; LIU Quanlin; BI Pingjun

doi:10.13204/j.gyjzG21030807

Volume 52 Issue 5

Jul. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(5): 120-125

Rong Xian, Zhang Jianxin, Li Yanjun, Li Yanyan. EXPERIMENTAL RESEARCH ON MECHANICAL BEHAVIOR OF INTERIOR JOINTS OF SPECIALLY SHAPED COLUMN FRAMES REINFORCED BY STEEL FIBER[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(5): 47-51. doi: 10.13204/j.gyjz201305011

Citation:

XU Qiyan, LIU Quanlin, BI Pingjun. Bending Capacity Calculation of Steel Reinfoned Concrete Composite Beams Considering Axial Force[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 120-125. doi: 10.13204/j.gyjzG21030807

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Bending Capacity Calculation of Steel Reinfoned Concrete Composite Beams Considering Axial Force

doi: 10.13204/j.gyjzG21030807

1. Shanghai Qiangjing Foundation Engineering Co., Ltd., Shanghai 201806, China;
2. College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2021-03-08
Available Online: 2022-07-23
Publish Date: 2022-07-23

Abstract

Abstract

In order to solve the bearing capacity calculation problem of the steel reinforced concrete composite beam in steel support system of foundation excavation, based on the plastic design theory and several assumptions, the calculation formulas for the bending capacity of the steel-concrete composite beam under axial force were derived,which had universal applicability, and the calculated results were in good agreement with the test results, indicating that the calculation formulas given in the paper were reliable. The formulas were summarized and unified, it was found that when axis forces changed,M_u -δ (the distance between the axial force action point and plastic neutral axis) curve ws composed of one or more quadratic parabolas, and the parabolas opened downward. The smaller δ, the larger M_u. When δ was equal to zero, the bending capacity reached the largest, and the corresponding axial force calculation formulas were given. The curvatured of the M_u-N curve was mainly determined by the width and strength of composite beam. The greater the material strength and width, the smaller the curvature, the flatter the curve.
- steel support,
- steel-concrete composite beam,
- effect of axial force,
- bending capacity,
- plastic neutralization axis

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References(10)

References

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