行车荷载引起桥梁振动对新老混凝土黏结性能影响
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摘要
为了确定在混凝土早龄期时受到行车荷载引起桥梁振动对新老混凝土黏结面抗拉性能的影响,采用峰值振动加速度为0.08g,0.16g,0.32g,3种振动能量,分别模拟轻、中、重3种交通状态引起的桥梁振动,对处于早龄期的新老混凝土黏结面进行振动试验。试验结果表明:振动发生在初凝前,3种形式的交通(轻、中、重)引起的振动对新老混凝土黏结面早期抗拉强度有增加作用。振动发生在初凝至终凝阶段,轻交通引起振动对新老混凝土黏结面的强度影响不明显;中等和重交通会造成黏结面早期抗拉强度(7 d以前)下降。振动发生在终凝后,轻交通引起的振动对新老混凝土黏结面的强度影响不明显;中等交通的振动会造成黏结面早期强度的下降;重载交通会造成黏结面的强度整体下降。
In order to testify the effect of traffic vibration induced bridge vibration on the tensile property of the adherence of new and old concrete during early age of concrete,a vibration test on such adherence is conducted. In the test,the vibration energy whose peak acceleration values are 0. 08 g,0. 16 g and 0. 32 g are used to simulate the bridge vibrations induced by light,middle and heavy traffic respectively. The test result shows that( 1) when vibrations occurred before concrete initial setting,all the 3 levels of traffic induced vibration can enhance the early age bond strength of new and old concrete;( 2) when vibrations occurred between initial setting and final setting,light traffic induced vibration has little effect on the bond strength,middle and heavy traffic induced vibrations can decrease the early age( before 7 d) bond strength;( 3) as to the adherence of new and old concrete when vibration occurred after concrete finial setting,light traffic induced vibration has little effect on the bond strength of new and old concrete,its early age bond strength descends under middle traffic induced vibration,and its bond strength drops largely with heavy traffic induced vibration.
In order to testify the effect of traffic vibration induced bridge vibration on the tensile property of the adherence of new and old concrete during early age of concrete,a vibration test on such adherence is conducted. In the test,the vibration energy whose peak acceleration values are 0. 08 g,0. 16 g and 0. 32 g are used to simulate the bridge vibrations induced by light,middle and heavy traffic respectively. The test result shows that( 1) when vibrations occurred before concrete initial setting,all the 3 levels of traffic induced vibration can enhance the early age bond strength of new and old concrete;( 2) when vibrations occurred between initial setting and final setting,light traffic induced vibration has little effect on the bond strength,middle and heavy traffic induced vibrations can decrease the early age( before 7 d) bond strength;( 3) as to the adherence of new and old concrete when vibration occurred after concrete finial setting,light traffic induced vibration has little effect on the bond strength of new and old concrete,its early age bond strength descends under middle traffic induced vibration,and its bond strength drops largely with heavy traffic induced vibration.
引文
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[2]SHRADDHAKAR H,DAVID D.Effects of Traffic Induced Vibrations on Bridge Deck Repairs[R].Manhattan:University of Kansas Center for Research,Inc.,1984.
[3]DUNHAM M R,RUSH A S,HANSON J H.Effects of Induced Vibrations on Early Age Concrete[J].Journal of Performance of Constructed Facilities,2007,21(3):179-183.
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[5]魏建军,邢姣秀,徐建成.早期振动对混凝土抗拉性能影响[J].公路交通科技,2011,28(1):96-99.WEI Jian-jun,XING Jiao-xiu,XU Jian-cheng.Effect of Vibrations at Early Concrete Ages on Concrete Tensile Strength[J].Journal of Highway and Transportation and Department,2011,28(1):96-99.
[6]ISSA M A.Investigation of Cracking in Concrete Bridges Decks at Early Ages[J].Journal of Bridge Engineering,1999,4(2):116-124.
[7]王朝祥.爆破震动对建筑物早期钢筋混凝土的影响[J].岩土工程界,2003,6(4):77-80.WANG Zhao-xiang.Effects of Blasting Vibration on Earlier Reinforced Concrete Structures of Buildings[J].Geotechnical Engineering World,2003,6(4):77-80.
[8]陈蕴生,李宁,吕强.混凝土衬砌的爆破模拟实验研究[J].西安理工大学学报,1996,12(1):47-51.CHEN Yun-sheng,LI Ning,LQiang.The Concrete Lined Blasting Vibration Simulation Test[J].Journal of Xi'an University of Technology,1996,12(1):47-51.
[9]KWAN A K H,NG P L.Effect of Traffic Vibration on Curing Concrete Stitch:PartⅠ-Test Method and Control Program[J].Engineering Structures,2007,29(29):2871-2880.
[10]KWAN A K H,NG P L.Effect of Traffic Vibration on Curing Concrete Stitch:PartⅡ-Cracking,Debonding and Strength Reduction[J].Engineering Structures,2007,29(29):2881-2892.
[11]POPOVICS S.新拌混凝土[M].陈志源,译.北京:中国建筑工业出版社,1990:200-205.POPOVICS S.Fresh Concrete[M].CHEN Zhi-yuan,translated.Beijing:China Construction Industry Press,1990:200-205.
[12]魏建军.行车荷载引起桥梁扰动对修复混凝土性能影响[D].南京:东南大学,2013.WEI Jian-jun.Effects of Traffic Load Induced Vibration on Performance of Repaired Concrete of Bridge[D].Nanjing:Southeast University,2013.
[2]SHRADDHAKAR H,DAVID D.Effects of Traffic Induced Vibrations on Bridge Deck Repairs[R].Manhattan:University of Kansas Center for Research,Inc.,1984.
[3]DUNHAM M R,RUSH A S,HANSON J H.Effects of Induced Vibrations on Early Age Concrete[J].Journal of Performance of Constructed Facilities,2007,21(3):179-183.
[4]魏建军,邢姣秀,付智.行车荷载引起桥梁振动对修复混凝土性能影响[J].东南大学学报:自然科学版,2010,40(5):1057-1060.WEI Jian-jun,XING Jiao-xiu,FU Zhi.Effect of Traffic Load Induced Bridge Vibration on Concrete Tensile Properties[J].Journal of Southeast University:Natural Science Edition,2010,40(5):1057-1060.
[5]魏建军,邢姣秀,徐建成.早期振动对混凝土抗拉性能影响[J].公路交通科技,2011,28(1):96-99.WEI Jian-jun,XING Jiao-xiu,XU Jian-cheng.Effect of Vibrations at Early Concrete Ages on Concrete Tensile Strength[J].Journal of Highway and Transportation and Department,2011,28(1):96-99.
[6]ISSA M A.Investigation of Cracking in Concrete Bridges Decks at Early Ages[J].Journal of Bridge Engineering,1999,4(2):116-124.
[7]王朝祥.爆破震动对建筑物早期钢筋混凝土的影响[J].岩土工程界,2003,6(4):77-80.WANG Zhao-xiang.Effects of Blasting Vibration on Earlier Reinforced Concrete Structures of Buildings[J].Geotechnical Engineering World,2003,6(4):77-80.
[8]陈蕴生,李宁,吕强.混凝土衬砌的爆破模拟实验研究[J].西安理工大学学报,1996,12(1):47-51.CHEN Yun-sheng,LI Ning,LQiang.The Concrete Lined Blasting Vibration Simulation Test[J].Journal of Xi'an University of Technology,1996,12(1):47-51.
[9]KWAN A K H,NG P L.Effect of Traffic Vibration on Curing Concrete Stitch:PartⅠ-Test Method and Control Program[J].Engineering Structures,2007,29(29):2871-2880.
[10]KWAN A K H,NG P L.Effect of Traffic Vibration on Curing Concrete Stitch:PartⅡ-Cracking,Debonding and Strength Reduction[J].Engineering Structures,2007,29(29):2881-2892.
[11]POPOVICS S.新拌混凝土[M].陈志源,译.北京:中国建筑工业出版社,1990:200-205.POPOVICS S.Fresh Concrete[M].CHEN Zhi-yuan,translated.Beijing:China Construction Industry Press,1990:200-205.
[12]魏建军.行车荷载引起桥梁扰动对修复混凝土性能影响[D].南京:东南大学,2013.WEI Jian-jun.Effects of Traffic Load Induced Vibration on Performance of Repaired Concrete of Bridge[D].Nanjing:Southeast University,2013.