發(fā)布時(shí)間：2019-02-25 20:30

【摘要】：以某大型鋼管混凝土拱橋?yàn)閷?duì)象,采用經(jīng)動(dòng)力試驗(yàn)驗(yàn)證的自編車橋耦合振動(dòng)分析程序,進(jìn)行了多組隨機(jī)不平度樣本下的車橋動(dòng)力響應(yīng)分析。根據(jù)分析結(jié)果,對(duì)不同橋面狀況和車速條件下橋梁的動(dòng)力沖擊效應(yīng)進(jìn)行了統(tǒng)計(jì)分析。分析結(jié)果表明:車速、不平度等級(jí)確定時(shí)沖擊系數(shù)服從正態(tài)分布。橋面狀況等級(jí)對(duì)動(dòng)力沖擊效應(yīng)的均值和均方差影響明顯,不同保證率下車輛沖擊系數(shù)差異較大。根據(jù)橋梁重要性等級(jí),按照統(tǒng)計(jì)分析方法確定沖擊系數(shù),將有效提高車輛沖擊系數(shù)取值的合理性和科學(xué)性。
[Abstract]:Taking a large concrete-filled steel tube arch bridge as an object, the dynamic response of a large-scale concrete-filled steel tube arch bridge is analyzed by means of a self-compiled program for coupled vibration analysis of vehicles and bridges verified by dynamic tests under a number of random unevenness samples. According to the analysis results, the dynamic impact effects of bridges under different deck conditions and vehicle speeds are statistically analyzed. The results show that the impact coefficient obeys the normal distribution when the speed and degree of irregularity are determined. The mean value and mean square deviation of dynamic impact effect are affected obviously by the condition grade of bridge deck, and the impact coefficient of vehicle varies greatly under different guarantee rates. According to the importance grade of the bridge and the statistical analysis method to determine the impact coefficient, the rationality and scientificity of the value of the vehicle impact coefficient will be improved effectively.
【作者單位】： 東北林業(yè)大學(xué)土木工程學(xué)院;交通運(yùn)輸部公路科學(xué)研究院;哈爾濱工業(yè)大學(xué)交通科學(xué)與工程學(xué)院;
【分類號(hào)】：U448.22

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本文編號(hào)：2430509