科研之友
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摘要
According to an analysis of the mechanical behaviour of irregular joints between steel box columns and beams, the deformation mechanism of the steel irregular joint panel zone is established based on the plastic hinge theory. A formula for calculating the yield shear force of the panel zone is also proposed. Through analysis of strain and simplified calculation models of the panel zone of a steel irregular joint, the shear mechanism in the panel zone of the joint is studied. Based on the stress state in the panel zone, a simplified formula is presented for calculating the shear resistance of the steel irregular joint. Experimental and theoretical study results indicate that irregular joints between steel box columns and beams exhibit good seismic performance and energy dissipation capacity. Ductility is consistent with the requirements of plastic ultimate deformation; bearing capacity degradation of all specimens is not significantwhen the displacement of the layer exceeds the ultimate displacement. The experimental results indicate that shear buckling failure in the small core area of the panel zone is the main failure mode. Comparison of the experimental andtheoretical results show that only the shear capacity of a small core area needs to be examined if the strength of the panel zone has been ensured. Calculation results for the shear capacity are in agreement withto the test results.
- 出版日期2016-6
- 单位西安建筑科技大学; 中国人民武装警察部队学院
