【摘要】：處于寒冷地區(qū)的鋼筋混凝土結構建筑物常常發(fā)生凍融破壞，抗凍性能是鋼筋混凝土耐久性能中非常重要的方面。目前，對于凍融后混凝土構件的抗震性能，國內外學者開展的研究工作還很少。 為更好地了解凍融后混凝土結構抗震性能，給抗凍混凝土設計與施工規(guī)程、規(guī)范的編制提供可靠的科學實驗數據，受國家自然科學基金重點項目“腐蝕和凍融環(huán)境下既有混凝土結構非線性動力行為和抗震性能評估方法研究”（項目編號：51078307）的資助，本文開展了混凝土柱凍融循環(huán)后抗震性能的試驗研究： 1.進行了凍融作用后混凝土柱抗震試驗研究。首先對四批共8個尺寸為200mm×200mm×1180mm的混凝土柱構件分別進行了0次，，100次，200次，300次凍融循環(huán)。然后對混凝土柱進行了兩種軸壓比下的低周反復荷載試驗。 2.通過試驗對比低周反復荷載下不同凍融次數后混凝土長柱和普通混凝土長柱的受力性能，對試驗所得滯回曲線隨著凍融循環(huán)作用次數的增加而變化作了較詳細的分析，分析了凍融作用對鋼筋混凝土柱抗震性能的影響。 3.分析對比軸壓比對凍融后混凝土長柱和普通混凝土長柱延性的影響，理論分析和研究不同軸壓比對凍融后鋼筋混凝土柱抗震性能的影響。 研究表明，凍融次數和軸壓比對混凝土構件的抗震性能的影響比較明顯。隨著凍融次數的增加，混凝土構件的抗震性能成明顯下降趨勢；凍融次數相同的混凝土柱在兩種軸壓比下抗震性能有著不同的變化。隨著軸壓比的增加，混凝土柱耗能能力變弱，延性變差，抗震性能降低。
[Abstract]:Freeze-thaw failure often occurs in reinforced concrete structures in cold areas, and frost resistance is a very important aspect of durability of reinforced concrete. At present, there is little research work on the seismic performance of freeze-thawed concrete members at home and abroad. In order to better understand the seismic performance of freeze-thawed concrete structures and provide reliable scientific experimental data for the design and construction rules and codes of freeze-thawed concrete, Supported by the key project of the National Natural Science Foundation of China, "Research on nonlinear dynamic behavior and Seismic performance Evaluation method of existing concrete structures in corrosion and freeze-thaw Environment" (Project No.: 51078307). In this paper, the experimental study on seismic performance of concrete columns after freeze-thaw cycle is carried out. The seismic test of concrete columns after freeze-thaw action is carried out. Firstly, four batches of 8 concrete column members with the size of 200mm 脳 200mm 脳 1180mm were subjected to 0, 100, 200 and 300 freeze-thaw cycles, respectively. Then the low cycle cyclic load tests of concrete columns under two kinds of axial compression ratio are carried out. 2. By comparing the mechanical properties of concrete long columns and ordinary concrete long columns under different freeze-thaw times under low cyclic loading, the variation of hysteretic curve with the increase of freeze-thaw cycle times is analyzed in detail. The influence of freeze-thaw action on seismic performance of reinforced concrete columns is analyzed. 3. The effects of axial compression ratio on the ductility of long concrete columns and ordinary concrete columns after freeze-thaw are analyzed and compared, and the effects of different axial compression ratios on seismic performance of reinforced concrete columns after freeze-thaw are analyzed and studied theoretically. The results show that the influence of freeze-thaw times and axial compression ratio on the seismic performance of concrete members is obvious. With the increase of freeze-thaw times, the seismic performance of concrete members decreases obviously, and the seismic performance of concrete columns with the same freeze-thaw times varies under two kinds of axial compression ratios. With the increase of axial compression ratio, the energy dissipation capacity of concrete columns becomes weaker, the toughness becomes worse, and the seismic performance decreases.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU375.3;TU352.11

【參考文獻】

相關期刊論文 前10條

1 鞏妮娜;劉西拉;;從結構工程的角度看混凝土在凍融循環(huán)下的破壞標準[J];四川建筑科學研究;2005年06期

2 張士萍;鄧敏;唐明述;;混凝土凍融循環(huán)破壞研究進展[J];材料科學與工程學報;2008年06期

3 胡安妮;任慧韜;;凍融循環(huán)對FRP增強混凝土柱影響試驗研究[J];大連理工大學學報;2006年06期

4 張娟秀;葉見曙;姚偉發(fā);;凍融循環(huán)作用下CFRP加固混凝土梁疲勞性能試驗研究[J];東南大學學報(自然科學版);2010年05期

5 杜永峰;喬琪;;化冰鹽對鋼筋混凝土梁承載力影響的研究[J];低溫建筑技術;2010年07期

6 張玉軍;;模擬凍-融過程的熱-水-應力耦合模型及數值分析[J];固體力學學報;2009年04期

7 蔣敏強,陳建康,楊鼎宜;硫酸鹽侵蝕水泥砂漿動彈性模量的超聲檢測[J];硅酸鹽學報;2005年01期

8 何世欽,貢金鑫,王海超;鹽凍循環(huán)下鋼筋與混凝土的粘結機理與退化模型[J];工業(yè)建筑;2005年12期

9 梁書亭，丁大鈞，陸勤;鋼筋混凝土復合配箍柱鉸的延性和抗震耗能試驗研究[J];工業(yè)建筑;1994年11期

10 張鵬,咸永珍,趙鐵軍;沿海地區(qū)混凝土結構的鋼筋銹蝕與防護[J];海岸工程;2005年02期

本文編號：2478510