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粘性土地区自锚式悬索桥猫道架设动力特性研究
肖 羚
(云南交投集团投资有限公司,650000,昆明)
摘 要: 基于粘性土地区的环境特征和区域特征,采用 ANSYS程序提取出自锚式悬索桥猫道架设的风
攻角、姿态角和风偏角对应的三分力系数,对自锚式悬索桥猫道架设进行静风响应分析,利用抗风缆系统结
构示意图,分析了抗风缆系统在自锚式悬索桥猫道架设中的作用,根据抗风吊杆的不同形式,在自锚式悬索
桥猫道架设中,分析吊杆形式以及动力影响因素,设置抗风门架和斜索的空间位置,在猫道架设中布置抗风
门架以及斜索,分析起动力特性影响因素,结合横向天桥设置的影响分析,实现了自锚式悬索桥猫道架设动
力特性研究,保证了自锚式悬索桥猫道架设施工人员的安全。
关键词: 粘性土地区;动力特性;猫道架设;自锚式悬索桥
中图分类号:U 448.25 文献标志码:A 文章编号:1000-4726(2023)07-0866-04
RESEARCH ON DYNAMIC CHARACTERISTICS OF SELF-ANCHORED SUSPENSION BRIDGE
CATWAY INSTALLATION IN COHESIVE SOIL REGION
XIAO Ling
(Yunnan Jiaotou Group Investment Co., Ltd., 671000, Kunming, China)
Abstract: Based on the environmental and geological characteristics of cohesive soil region, this
paper used ANSYS program to get the aerostatic coefficients of wind attack angle, attitude angle
and wind declination angle of self-anchored suspension bridge catway installation, to carry out static
wind response analysis for self-anchored suspension bridge catway installation. Wind resistant cable
system sketch map was drawn to analyze the function of wind resistant cable system in self-anchored
suspension bridge catway installation. According to different types of wind resistant suspension rods in
self-anchored suspension bridge catway installation, it analyzed the suspension rod type and dynamic
influencing factors, set the space position of wind resistant gantry and oblique staying cable, arranged
wind resistant gantry and oblique staying cable for catway installation, analyzed factors influencing
dynamic characteristics. Analysis of the influence caused by transverse overhead bridge installation
realized research on the dynamic characteristics of self-anchored suspension bridge catway installation
and guaranteed the construction safety.
Keywords: cohesive soil region; dynamic characteristics; catway installation; self-anchored suspension
bridge
1 自锚式悬索桥猫道架设的静风响应分析
基于粘性土地区的环境特征和区域特征,自锚式
悬索桥猫道架设具有柔性和大跨的特点,对其进行静
风响应分析时,必须考虑猫道架设的几何非线性。此
外,当自锚式悬索桥猫道架设受到风荷载作用时会出
现较大的位移,导致风攻角、姿态角和风偏角也会随
之发生变化。这一过程表明,自锚式悬索桥猫道架设
的静风荷载具有非线性变化的特征。
将程序分析与风洞试验结合在一起,对自锚式悬
索桥猫道架设进行静风响应分析。对自锚式悬索桥猫
道架设施加静风荷载时,先将风洞试验得到的静力三
分力系数输入数组,在风荷载下,自锚式悬索桥猫道
架设出现位移,风攻角、姿态角和风偏角产生变化,
依据 ANSYS 程序,提取不同角度有效值对应的三分
力系数,为下一步迭代做铺垫,具体计算过程如下。
(1)建立自锚式悬索桥猫道架设的有限元模型。
(2)设置自锚式悬索桥猫道
粘性土地区自锚式悬索桥猫道架设动力特性研究(论文).pdf