复合边界条件下基于能量法吊索张力实用公式  

Practical Formula for Hanger Tension Under Combined Boundary Conditions Based on Energy Method

作　　者：何容[1] 何伟[1] 陈淮[2] 赵倩[1] 

机构地区：[1]华北水利水电学院土木与交通学院,郑州450011 [2]郑州大学土木工程学院,郑州450001

出　　处：《振动．测试与诊断》2013年第2期187-191,334,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：高等学校博士学科点专项科研基金资助项目(200804590006);河南省高等学校青年骨干教师资助项目(2010GGJS-127)

摘　　要：为提高工程中吊杆张力计算精度,考虑了中、下承式拱桥吊索两端拱肋和系杆梁附加质量、减振垫减振作用及弹性支承等复合边界条件,基于Rayleigh能量法建立了吊索横向振动频率和吊索张力的显式关系式。采用京港澳高速公路郑州黄河二桥主桥施工现场测试数据,对所推导的计算公式进行了验证。结果表明,该计算公式比较全面地考虑了吊索两端实际复合边界条件,与传统计算公式相比,其计算结果精度更高,且为显式表达式,更适用于中、下承式拱桥吊索的张力计算及工程现场测试使用。对于郑州黄河二桥主桥等采用刚性系杆梁的中、下承式拱桥,吊索两端约束条件更接近于固接。To improve the calculation precision of hanger tension in engineering, the complex boundary conditions such as addition masses of tied beams and ribs at both ends of hanger,damping effect of shock pads and elastic supports are considered,some explicit relational expressions between hanger tension and the transverse vibration frequency are established based on Rayleigh theory.The expressions are verified by the measured construction data of the Second Yellow River Bridge in Zhengzhou on Beijing-Hong Kong-Macao expressway.The results show that the expressions considered the combined boundary conditions are suited to calculate tensions of long or short hangers with high precision.And the expressions are strongly practical for their explicit forms.For the Second Yellow River Bridge in Zhengzhou,the restraint at the ends of hanger is mostly close to fixed.

关 键 词：吊索 张力 复合边界条件 能量法 

分 类 号：U446.3[建筑科学—桥梁与隧道工程] U448.225[交通运输工程—道路与铁道工程]