东南大学学报（自然科学版）2016，Vol.46Issue(2)：360-364,5.DOI:10.3969/j.issn.1001-0505.2016.02.021
超宽加劲梁自锚式悬索桥动力特性敏感性分析
Sensitivity analysis on dynamic characteristics of self-anchored suspension bridge with super-wide girder
摘要
Abstract
To study the sensitivity of the dynamic characteristic of self-anchored suspension bridges with super-wide concrete girders to around circumstances, the influences of the dead load intensity, the environmental temperature, and the support subsidence on the dynamic characteristic were ana-lyzed by using the method combining nonlinear finite element and subspace iteration.The results show that the first-order frequency is 0.674 Hz in the finished state and the vertical vibration mode plays a leading role, but the longitudinal floating mode appears late because of the large constraints to girders in the direction.Due to the influence of the super-wide section on the torsion rigid which should be taken into account in the following analysis, the torsion mode emerges early with mode cou-pling.All structural frequencies are sensitive to the dead load intensity but not to the support subsid-ence.The frequencies of the vertical bending of the girder are sensitive to the temperature, but those related to transverse vibration are not.It is suggested that the effects of the dead load intensity and the environmental temperature should be considered in field tests of dynamic characteristics.关键词
自锚式悬索桥/动力特性/子空间迭代法/敏感性分析/超宽截面Key words
self-anchored suspension bridge/dynamic characteristics/subspace iteration method/sensitivity analysis/super-wide section分类
交通工程引用本文复制引用
夏志远,李爱群,李建慧,端茂军..超宽加劲梁自锚式悬索桥动力特性敏感性分析[J].东南大学学报（自然科学版）,2016,46(2):360-364,5.基金项目
国家自然科学基金资助项目（51278104）、高等学校博士学科点专项科研基金资助项目（20133204120015）、江苏省交通运输科学研究计划资助项目（2011Y03）、江苏省高校自然科学基金资助项目（12KJB560003）、江苏高校优势学科建设工程资助项目（ CE02-1-35）． （）
