電熱熔渣銲道及梁翼板偏心對SM570M-CHW鋼梁柱接頭耐震性能影響

覃志光

doi:10.6342/NTU201701544

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电热熔渣焊道及梁翼板偏心对SM570M-CHW钢梁柱接头耐震性能影响

Seismic performance of SM570M-CHW steel beam-to-column joints with eccentricity among electroslag welding, diaphragm and beam flange alignment

覃志光 , 硕士　　导师：蔡克铨　　

繁体中文 DOI： 10.6342/NTU201701544

钢箱型柱；电热熔渣焊；钢材断裂预测模型；钢梁柱接头； SM570M-CHW高强度钢； steel box column ； electro-slag welding ； fracture prediction model ； steel beam-to-column connection ； SM570M-CHW steel

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摘要 │ 参考文献 (25) │ 国际计量

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Tall buildings are getting taller and taller in the mega cities all over the globe. The need of using SM570M-CHW high-strength steel for building constructions in Taiwan is increasing. In order to transfer the beam moment, diaphragms at the beam flange elevations are often welded into the built-up box column using the electro-slag welding (ESW). However, the elevations of the diaphragm, the ESW and the beam flange may not be perfectly aligned. This could be caused by the fabrication error or the slight difference of the depths of two beams framing into the column. The misalignment in beam flange and diaphragm, with or without the eccentricity of ESW, may lead to the brittle fracture due to stress concentrations near the ESW to column flange heat affected zone (HAZ). This study uses the damage prediction model proposed by Kanvinde and Deierlein to investigate the damage potential of ESW component specimens using SM570M-CHW steel with the eccentricity between the beam flange and the ESW. The Abaqus model analysis results are compared with the experiment observations. 
    The ESW component was constructed from a SM570M-CHW steel 500×500×28mm box column with 200×28mm beam flanges. The ESW eccentricity was measured using ultrasonic tests (UT), specimens with various eccentricities between the beam flange and the diaphragm were constructed.
    The damage prediction models are applied to predict the critical strength and displacement of the ESW components test results. Experiment and analysis results suggest that the eccentricity between the beam and the diaphragm must be no greater than three fourth of the column flange thickness in order to prevent the brittle fracture at the HAZ. The analytical results with varying column thickness indicate that increasing the column flange thickness reduces the abovementioned fracture potential effectively.

参考文献 ( 25 ) 〈TOP〉

[2] ANSI/AISC 341-05 (2005) “Seismic provisions for structural steel buildings- including supplement No .1” American Institute of Steel Construction, Chicago, IL.
连结：
[3] ANSI/AISC 360-05 (2005) “Specification for Structural Steel Building.” American Institute of Steel Construction, Chicago, IL.
连结：
[5] JISF (2015) “High Performance Steels For Bridge Construction.” The Japan Iron and Steel Federation.
连结：
[7] Kanvinde, A.M. and Deierlein, G.G. (2006) “Void Growth Model and Stress Modified Critical Strain Model to Predict Ductile Fracture in Structural Steels.” Journal of Engineering Mechanics, ASCE/June 2006/1907.
连结：
[8] Lee D. and Shin S. (2015) “Specimen Test of Large-Heat-Input Fusion Welding Method for Use of SM570TMCP.” Advances in Materials Science and Engineering, Volume 2015, Article ID 264798, 13 pages.
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引用含有DOI的文献

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。 如想对DOI的使用与概念有进一步了解，请参考 （ ） 。

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。