; 1 . the trend of the development of burden and light hanging basket in the cantalever construction of continuous rigid frame bridge has been prospected , the roof truss and cable - state composite hanging basket also has been designed by analyzing and comparing with other ones . 2 对大跨度桥梁悬臂浇筑施工的各种形式挂篮施工工艺进行了比较和总结,对连续刚构桥悬臂浇筑挂篮施工中重载轻型的发展趋势进行了展望,提出了一种用于解决重载轻型悬臂浇筑施工的新型桁架斜拉式组合挂篮,并进行了可行性分析计算和设计。
With the development of science technology and traffic enterprise , the continuous rigid frame bridge has been growing up rapidly in the recent years with it ' s unique predominance of handy construction , economical cost , reasonable internal force and comfortable traveling . it almost has become the first selective bridge style when the main span is in the range from 200m to 300m 随着科学技术和交通事业的发展,预应力砼连续刚构桥以其施工简便、造价经济、受力合理、行车舒适等独特优势在近年来得到了迅速崛起,在主跨200 300m范围内几乎成为首选桥型。
Chapter two discourses the basic theory , calculation model and main advantages and disadvantages of regression analysis and time series analysis . chapter three discusses grey system theory in detail , including the basic theory , grey incidence analysis , model in common use and forecasting method . chapter four analyzes the results of flexibility deformation of 270 meters span continuous rigid frame bridge of humen bridge , calculated with regression , time series and grey system model 第1章介绍了变形监测的目的、意义、分类以及变形分析与预测研究的现状和进展;第2章论述了回归分析和时间序列分析的基本理论、计算模型和主要优缺点:第3章详细讨论了灰色系统理论,包括建模的理论基础、灰色关联分析、常用模型和预测方法;第4章为采用回归模型、时间序列模型、灰色系统理论模型,对虎门大桥270米混凝土连续刚构桥施工中的挠度变形进行的计算分析。
With the development of science technology and traffic enterprise , the continuous rigid frame bridge has been growing up rapidly in the recent years with it ' s unique predominance of handy construction , economical cost , reasonable internal force and comfortable travelling . it has strong competitive ability when the main span is in the range from 200m to 300m ( even over 300m ) 随着科学技术和交通事业的发展,预应力混凝土连续刚构桥以其施工简便、造价经济、受力合理、行车舒适等独特优势在近年来得到了迅速崛起,主跨在200m 300m (甚至300m以上)的跨度时具有极强的竞争力。
By analysis and compare to continuous rigid frame bridge at the condition of temperature uniform change , i found the bending moment change of pier either single pier or thin double piers takes a increasing trend with the ratio of beam bending rigidity and pier lateral displacement rigidity . the bending moment has a extreme value when the ratio of rigidity very small ( a constant ) . and in the condition , the structure inner force changes in the pier which mainly takes bending at first and takes bending and shearing force at last 通过分析比较,发现连续刚构体系桥梁在受到均匀温变力作用下:无论是单墩还是双薄壁墩结构的弯矩都随梁的抗弯刚度与墩抗侧移刚度比的降低而呈增长趋势,当刚度比值小到一定值时弯矩将出现极值,随着刚度比进一步的减小弯矩值又将呈下降趋势,而结构由最初的墩以弯曲内力为主逐步转向以弯剪共同作用;结构的剪力值随梁抗弯刚度与墩抗侧移刚度比的降低而呈单向攀升趋势,其增长速率较快。