老化-荷载耦合下叠层轮胎隔震垫的竖向力学性能
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摘要
为研究叠层轮胎隔震支座(Scrap tire rubber pads,STP)在老化与不同荷载耦合下的轴压性能,选取180 mm×180 mm×69 mm的6层STP,利用老化试验箱和加载模具在100℃恒温及4 MPa、5 MPa、6 MPa作用下分别对试件进行77 h、154 h、231 h、308 h加速老化试验,对比试验前后加载模具力、试件外观、竖向极限压应力、竖向刚度和竖向变形性能的变化,得到它们随老化时间的变化规律。同时,在考虑老化前后STP竖向力学性能稳定性的基础上,建议选取5 MPa为最佳设计压应力。最后提出了STP的轴压破坏准则,修正了适用于叠层轮胎隔震垫的竖向变形性能公式。
In order to study the axial compression performance of scrap tire rubber pads(STP) under different aging-loading coupling, the 6-layer STP of 180 mm×180 mm×69 mm were selected. accelerated aging tests of specimens were carried out in a temperature-controlled weathering chamber at 100 ℃ for 77 h, 154 h, 231 h, 308 h, respectively, and the specimens were under the loading of 4 MPa, 5 MPa, 6 MPa, respectively. The change rule of loading die force, specimen appearance, vertical ultimate compressive stress, vertical stiffness and vertical deformation change with aging time is obtained by comparison between the test and the experiment.Meanwhile, on the basis of considering the stability of STP vertical mechanical properties before and after aging, it is recommended to select 5 MPa as the best design compressive stress.Finally, the principle of the axial compression failure of STP is proposed, and the formula of vertical deformation for scrap tire rubber pads is modified.
In order to study the axial compression performance of scrap tire rubber pads(STP) under different aging-loading coupling, the 6-layer STP of 180 mm×180 mm×69 mm were selected. accelerated aging tests of specimens were carried out in a temperature-controlled weathering chamber at 100 ℃ for 77 h, 154 h, 231 h, 308 h, respectively, and the specimens were under the loading of 4 MPa, 5 MPa, 6 MPa, respectively. The change rule of loading die force, specimen appearance, vertical ultimate compressive stress, vertical stiffness and vertical deformation change with aging time is obtained by comparison between the test and the experiment.Meanwhile, on the basis of considering the stability of STP vertical mechanical properties before and after aging, it is recommended to select 5 MPa as the best design compressive stress.Finally, the principle of the axial compression failure of STP is proposed, and the formula of vertical deformation for scrap tire rubber pads is modified.
引文
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3 Chen W,Xiong F.Journal of Guizhou Normal University (Natural Sciences),2014,32(4),94(in Chinese).陈文,熊峰.贵州师范大学学报(自然科学版),2014,32(4),94.
4 Wang Y X,Zhang G T,Li B Y,et al.Journal of Henan University of Scie-nce and Technology (Natural Science),2018,39(2),59(in Chinese).王玉喜,张广泰,李宝元,等.河南科技大学学报(自然科学版),2018,39(2),59.
5 Zhang X Z,Zhou F L,Xu L,et al.Journal of Xi’an University of Architecture & Technology (Natural Science Edition),2009,41(6),791(in Chinese).庄学真,周福霖,徐丽,等.西安建筑科技大学学报(自然科学版),2009,41(6),791.
6 Liu W G,Li Z R,Zhou F L,et al.Earthquake Engineering and Enginee-ring Dynamics,2002(6),115(in Chinese).刘文光,李峥嵘,周福霖,等.地震工程与工程振动,2002(6),115.
7 Chou H W,Huang J S.Journal of Applied Polymer Science,2011,123(4),2194.
8 Chou H W,Huang J S,Lin S T.Journal of Applied Polymer Science,2010,103(2),1244.
9 Gu H S,Itoh Y.Advances in Structural Engineering,2010,6(13),1105.
10 Gu H S,Itoh Y.Advanced Materials Research,2011,163-167,3343.
11 Itohy,Guhs,Satohk,et al.Journal of Structural Mechanics and Earthquake Engineering,2006,74(1),17.
12 Celina M,Wise J,Ottesen D K,et al.Polymer Degradation & Stability,2000,68(2),171.
13 Zhang X Z,Zhou F L,Shen Z Y,et al.Journal of Beijing University of Technology,2011,37(7),993(in Chinese).庄学真,周福霖,沈朝勇,等.北京工业大学学报,2011,37(7),993.
14 Liu W G,Yang Q R,Zhou F L.World Earthquake Engineering,2003(2),39(in Chinese).刘文光,杨巧荣,周福霖.世界地震工程,2003(2),39.
15 Gu Haosheng,Itoh Yoshito.Journal of Beijing University of Technology,2012,38(2),186(in Chinese).顾浩声,伊藤義人.北京工业大学学报,2012,38(2),186.
16 Gu Haosheng,Itoh Yoshito.Journal of Beijing University of Technology,2012,38(10),1515(in Chinese).顾浩声,伊藤義人.北京工业大学学报,2012,38(10),1515.
17 Ma Y H,Li Y M,Zhao G F,et al.Earthquake Engineering and Enginee-ring Dynamics,2017,37(5),38(in Chinese).马玉宏,李艳敏,赵桂峰,等.地震工程与工程振动,2017,37(5),38.
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20 Pei R J,Tang J X.Earthquake Resistant Engineering and Retrofitting,1993(3),36(in Chinese).裴若娟,唐家祥.工程抗震,1993(3),36.
21 Zhang G R.Study on the aging relaxation mechanism of rubber at different compression ratios.Master’s Thesis,Beijing University of Chemical Technology,China,2011(in Chinese).张国荣.不同压缩比下橡胶老化松弛机理的研究.硕士学位论文,北京化工大学,2011.
22 Yi J.Prediction of rubber aging life and study on molecular movement ability under pressure.Master’s Thesis,Beijing University of Chemical Technology,China,2009(in Chinese).易军.橡胶老化寿命预测及压力条件下分子运动能力的研究.硕士学位论文,北京化工大学,2009.