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張一鑫

 

（西安交通工程學(xué)院 ，西安 710300)

摘   要：為研究腐蝕環(huán)境下鋼結(jié)構(gòu)局部點蝕對抗震性能的影響，選擇了5 根 H 型 Q235 鋼柱并對其不同位置進行了相同程度的點蝕，采用低周反復(fù)加載試驗，評估不同位置局部點蝕對鋼結(jié)構(gòu)抗震性能的影響，并通過數(shù)值模擬，分析了點蝕損傷對鋼柱的荷載和耗能能力的影響規(guī)律。結(jié)果表明： 局部點蝕會顯著降低鋼柱的峰值荷載、剛度以及承載力；純彎段點蝕對鋼柱抗震性能的削弱程度遠高于彎剪段點蝕，且右半截面點蝕后鋼柱的抗震性能降低程度同樣高于下半截面點蝕；針對局部點蝕鋼柱提出修復(fù)方法，包括表面處理 、補強加固等，為腐蝕環(huán)境下鋼結(jié)構(gòu)建筑的抗震性能研究提供了借鑒。

關(guān)鍵詞：H 型鋼柱 ；局部點蝕 ；抗震性能

中圖分類號：TU391 . 3            

文獻標志碼：A            

文章編號： 1005- 8249  (2025)  02- 0097- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.017

 

ZHANG Yixin

(Xi ’an Traffic Engineering Institute ,  Xi ’an 710300 ,  China)

Abstract: To investigate the impact of localized pitting corrosion on seismic performance of steel structures in corrosive environments, five H-shaped steel columns were selected and subjected to varying degrees of pitting corrosion at same locations. Based on low cycle repeated loading tests, the influence of localized pitting corrosion at different locations on the seismic performance of steel structures was evaluated, and the impact of pitting damage on the load and energy dissipation capacity of steel columns was analyzed through numerical simulation. The results indicate that local pitting corrosion significantly reduces the peak load, stiffness, and bearing capacity of steel columns. The degree of weakening of seismic performance of steel columns by pure bending section pitting is much higher than that by bending shear section pitting, and the degree of reduction in seismic performance of steel columns after right half section pitting is also higher than that of lower half section pitting. Based on the research results, a repair method for locally corroded steel columns has been proposed, including surface treatment, reinforcement, etc., providing theoretical basis and technical support for the research on the maintenance and repair seismic performance of steel structure buildings in corrosive environments

Key words:H-shaped steel column;local pitting corrosion;seismic performance

基金項目： 陜西省教育廳科學(xué)研究計劃項目  (23JK0532) 。

作者簡介： 張一鑫  (1994—) , 男，碩士，講師，研究方向： 建筑結(jié)構(gòu)抗震 、綠色建筑。

收稿日期：2024 - 12 - 19