酸性大氣環境下鋼框架梁抗震性能試驗研究及有限元分析

EXPERIMENTAI STUDY AND FINITE ELEMENT ANALYSIS ON SEISMIC BEHAVIOR OF STEEL FRAMED BEAMS IN ACIDIC ATMOSPHERIC ENVIRONMENT

鄭山鎖(Shan-Suo Zheng) ； 劉毅(Liu Yi) ； 張曉輝(Xiao-Hui Zhang) ； 劉曉航(Xiao-Hang Liu)

《中國土木水利工程學刊》 32卷7期 (2020/11) Pp. 577-584

https://doi.org/10.6652/JoCICHE.202011_32(7).0001

摘要

通過人工氣候環境類比技術對酸性大氣環境進行模擬，對6榀鋼框架梁試件進行了加速腐蝕，並對其進行擬靜力載入試驗，研究不同銹蝕程度對鋼框架梁抗震性能指標的影響。運用ABAQUS對試件進行有限元分析，將類比滯回曲線、承載力及耗能和試驗結果進行對比，並分析了產生差異的原因。結果表明：不同銹蝕程度的鋼框架梁試件的受力破壞均為在梁端形成塑性鉸的延性破壞。滯回曲線均呈現出較為飽滿的梭形。隨著銹蝕程度的增大，鋼框架梁的極限承載力越小，剛度退化明顯，試件的延性係數和耗能能力減小。有限元分析結果與試驗結果吻合較好，有限元模型能很好的預測銹蝕鋼框架梁在往復荷載作用下的受力性能。

關鍵字

鋼框架梁 ； 酸性大氣環境 ； 銹蝕程度 ； 擬靜力試驗 ； 抗震性能 ； 有限元分析

並列摘要

The accelerated corrosion tests of acidic atmosphere environment were implemented on 6 steel frame beams firstly. And then the low cyclic loading tests were carried out on these corroded specimens. The effects of corrosion degree on the anti-seismic property of the specimens were analyzed. Nonlinear finite element analysis was conducted on the specimens using ABAQUS. The simulating hysteretic curves, bearing capacity and energy dissipation were compared with test results, and the difference between simulating results and test results was also analyzed. The results show that the failure process of steel frame beams with different corrosion degree all exhibite ductile failure, which is induced by the formation of the plastic hinge at the beam end. And the hysteretic curves are plump full without significant pinching effects. As the corrosion degree increase, the load bearing capacity decrease, strength and stiffness degenerate obviously, ductility and energy dissipation capacity degrade significantly. The simulating results agreed well with test results, indicating that the finite element model can well predict the mechanical behavior of corroded steel frame beams under cyclic loading.

並列關鍵字

steel frame beam ； acidic atmosphere ； degree of corrosion ； pseudostatic test ； seismic performance ； finite element analysis

參考文獻

李冬梅(2018).淺談金屬腐蝕與防護方式.全面腐蝕控制.32(3),27-28.

王彩雲(2012).金屬腐蝕的危害及防護.機械管理開發.22(5),111-112.

史煒洲,童樂為,陳以一(2012).腐蝕對鋼材和鋼樑受力性能影響的試驗研究.建築結構學報.33(7),53-60.

鄭山鎖,張曉輝,王曉飛(2016).近海大氣環境下多齡期鋼框架柱抗震性能的試驗研究.土木工程學報.49(4),69-77.

徐善華,秦廣沖,張宗星(2016).中性鹽霧腐蝕鋼板的滯回性能試驗.哈爾濱工業大學學報.48(11),183-188.