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       楊志剛1 ,  董世博2 ,  仲小玲2 ,  張   晨2 ,  鄔叢斌2

 

( 1 .  新疆路橋橋梁工程建設有限責任公司 ，烏魯木齊 830021 ; 2. 新疆農業大學 交通與物流工程學院 ，烏魯木齊 830052)

摘   要 ：針對西北地區冬季環境中混凝土結構物的耐久性問題 ，探究粉煤灰與纖維對混凝土服役期壽命的 增長趨勢 ，選用兩種不同配合比 ，開展凍融循環試驗 ，對耐久性進行研究。建立 Weibull（威布爾） 概率分布函 數 ，對其退化規律建立模型 ；選用最小二乘法進行 Weibull（威布爾） 參數估計值的計算。結果表明：兩組配比 下混凝土經過循環質量損失普通混凝土（簡稱 A 組） 為 4. 3% 、SY - A 粉煤灰混凝土（簡稱 B 組） 為 3 . 63% ; 相對動彈性模量損傷 A 組為 35. 4% 、B 組為 27. 4% ;  強度損失 A 組為 30. 6% 、B 組為 21 . 9% ;  根據壽命預測 A 組循環 345 次 、B 組循環 450 次達到極限。依據 Weibull 函數構建的圖像模型能有效的描述壽命損失的過程 ，可 反應出結構物失效點 ，Weibull 函數能有效預測混凝土的服役壽命。

關鍵詞：抗凍性能 ；模型預測 ；強度損失 ；動彈模量 ；快凍法

中圖分類號：U444           文獻標志碼：A

          

文章編號： 1005- 8249   (2025)  03- 0023- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .005

Yang Zhigang¹, Dong Shibo², Zhong Xiaoling²，Zhang Chen²，Wu Congbin²

(1. Xinjiang Road and Bridge Engineering Construction Co., Ltd., Urumqi 830021; 2. College of Transportation and Logistics Engineering, Xinjiang Agricultural University, Urumqi 830052；）

Abstract: In order to solve the durability problem of concrete structures in the winter environment of Northwest China, the growth trend of fly ash and fiber on the service life of concrete was explored, and two different mix ratios were selected to carry out freeze-thaw cycle tests to study the durability. The Weibull probability distribution function was established, and the degradation law was modeled. The least squares method was used to calculate the estimated value of Weibull parameters. The results show that the mass loss of concrete after circulation is 4.3% for ordinary concrete (referred to as group A) and 3.63% for SY-A fly ash concrete (referred to as group B) under the ratio of the two groups. The relative dynamic elastic modulus damage was 35.4% in group A and 27.4% in group B. The strength loss was 30.6% in group A and 21.9% in group B. According to the lifespan, it is predicted that the limit will be reached at 345 cycles in group A and 450 cycles in group B. The image model constructed based on the Weibull function can effectively describe the process of life loss, reflect the failure point of the structure, and the Weibull function can effectively predict the service life of concrete.

Keywords: frost resistance; model prediction; strength loss; dynamic modulus; quick-freeze method

基金項目： 中央引導地方科技發展資金  (ZYYD2025QY18) ;  校級研究生科研創新計劃項目 (XJAUGRI2025049) 。

作者簡介：楊志剛  (1981 —) ,  男 ，本科 ，高級工程師 ，研究方向：道路橋梁檢測。

通信作者：仲小玲  (1985—) ,  女 ，碩士 ，副教授／高級工程師 ，研究方向：道路工程。

      收稿日期：2024 - 12 - 31