摘要
从结构基频、车辆荷载冲击系数和舒适性等方面对钢管混凝土拱桥的车振性能进行分析。应用统计分析方法研究表明,钢管混凝土拱桥的面内基频约为钢拱桥的1.33倍,同时给出了面内基频的简化计算公式。收集了多座钢管混凝土拱桥的实测冲击系数,与现行各国规范进行了比较分析,并通过对实测数据的回归分析,得出钢管混凝土拱桥冲击系数的简化计算公式,可供钢管混凝土拱桥初步设计时冲击系数估算应用。最后对钢管混凝土拱桥的舒适性评价指标进行了探讨,振动速度和振动加速度等动力参数可以较好地反应出钢管混凝土拱桥在汽车荷载通过时的振动情况与振感。
Dynamic behaviors of concrete filled steel tubular （CFST） arch bridges under vehicle moving loads is analyzed from their fimdamental frequency, impact coefficient and vibration comfort, The fundamental frequency of CFST arch bridge is about 1.33 times of steel arch bridge and the formula to calculate the fundamental frequency is obtained by statistical method. Test impact coefficients of several CFST arch bridges are investigated and compared with different codes abroad, and a simplified formula to estimate it is presented by regress analyses, which can be used in preliminary plan. Finally the evaluation index of vibration comfortability of CFST arch bridge is discussed, and vibration speed and acceleration show that the dynamic behavior of CFST arch bridge is well under vehicle moving loads.
出处
《公路交通科技》
CAS
CSCD
北大核心
2007年第12期54-59,共6页
Journal of Highway and Transportation Research and Development
基金
福建省教育厅科技项目基金资助(JB04006)
关键词
桥梁工程
钢管混凝土
拱桥
基频
冲击系数
舒适性
bridge engineering
concrete filled steel tubular
arch bridge
fundamental frequency
impact coefficient
comfortability
