预应力混凝土梁自振频率的疲劳演变
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杜永潇,卫军,孙晓立
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Fatigue evolution of natural frequency for prestressed concrete beam
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Yong-xiao DU,Jun WEI,Xiao-li SUN
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| 表 2 梁PCB-MPD-CFL-1疲劳过程理论频率及实测频率的汇总表 |
| Tab.2 Summary of theoretical frequencies and measured frequencies of beam PCB-MPD-CFL-1 |
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| N/104 | we(N)/Hz | | wE(N)/Hz | | 第1阶 | 第2阶 | 第3阶 | 第1阶 | 第2阶 | 第3阶 | | 0 | 27.344 | 75.543 | 141.933 | | 26.240(−4.04%) | 104.961(38.94%) | 236.161(66.39%) | | 1 | 26.137 | 72.591 | 138.184 | 25.798(−1.30%) | 103.190(42.15%) | 232.178(68.02%) | | 5 | 26.344 | 73.242 | 139.039 | 25.183(−4.41%) | 100.733(37.53%) | 226.650(63.01%) | | 9 | 25.996 | 72.429 | 137.207 | 24.975(−3.93%) | 99.898(37.93%) | 224.771(63.82%) | | 40 | 25.943 | 72.266 | 136.719 | 24.650(−4.98%) | 98.602(36.44%) | 221.854(62.27%) | | 60 | 25.855 | 71.777 | 136.067 | 24.501(−5.24%) | 98.003(36.54%) | 220.508(62.06%) | | 100 | 25.557 | 71.435 | 135.742 | 24.406(−4.50%) | 97.624(36.66%) | 219.654(61.82%) | | 150 | 25.367 | 71.289 | 134.440 | 23.286(−8.20%) | 93.144(30.66%) | 209.575(55.89%) | | 200 | 24.879 | 69.824 | 131.673 | 22.760(−8.52%) | 91.041(30.39%) | 204.842(55.57%) | | 240.6 | 24.414 | 69.513 | 130.964 | 21.916(−10.23%) | 87.664(26.11%) | 197.243(50.61%) | | 248.3 | 23.958 | 68.271 | 128.654 | 20.416(−14.78%) | 81.665(19.62%) | 183.747(42.82%) | | | N/104 | wT(N)/Hz | | wP(N)/Hz | | 第1阶 | 第2阶 | 第3阶 | 第1阶 | 第2阶 | 第3阶 | | 0 | 25.279(−7.55%) | 89.586(18.59%) | 158.329(11.55%) | | 26.249(−4.01%) | 104.961(38.94%) | 236.161(66.39%) | | 1 | 24.885(−4.79%) | 88.581(22.03%) | 158.218(14.50%) | 25.806 (−1.27%) | 103.190(42.15%) | 232.178(68.02%) | | 5 | 24.334(−7.63%) | 87.143(18.98%) | 157.848(13.53%) | 25.192 (−4.37%) | 100.733(37.53%) | 226.650(63.01%) | | 9 | 24.146(−7.12%) | 86.643(19.63%) | 157.666(14.91%) | 24.983(−3.90%) | 99.898(37.93%) | 224.771(63.82%) | | 40 | 23.854(−8.05%) | 85.856(18.81%) | 157.328(15.07%) | 24.659 (−4.95%) | 98.602(36.44%) | 221.854(62.27%) | | 60 | 23.719(−8.26%) | 85.488(19.10%) | 157.149(15.49%) | 24.510 (−5.20%) | 98.003(36.54%) | 220.508(62.06%) | | 100 | 23.633(−7.53%) | 85.254(19.34%) | 157.029(15.68%) | 24.415 (−4.47%) | 97.624(36.66%) | 219.654(61.82%) | | 150 | 22.615(−10.85%) | 82.400(15.59%) | 155.181(15.43%) | 23.295 (−8.17%) | 93.144(30.66%) | 209.575(55.89%) | | 200 | 22.133(−11.04%) | 81.008(16.02%) | 154.051(16.99%) | 22.770 (−8.48%) | 91.041(30.39%) | 204.842(55.57%) | | 240.6 | 21.356(−12.53%) | 78.706(13.23%) | 151.897(15.98%) | 21.925 (−10.19%) | 87.664(26.11%) | 197.243(50.61%) | | 248.3 | 19.964(−16.67%) | 74.424(9.01%) | 147.087(14.33%) | 20.426 (−14.74%) | 81.665(19.62%) | 183.747(42.82%) |
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