Presented in this thesis is a model test of the arch ribs segment with concrete filled steel tube ( cfst ) of maocaojie bridge , which is located in the yiyang of the hunan province and provides the engineering base for the test 本文以湖南省益阳茅草街大桥为工程背景，进行了茅草街大桥主拱圈钢管混凝土拱肋拱顶1 ： 5节段模型试验。
A butterfly - shape arch bridge in zhongshan city is a multi - element spatial structure composed of inclined steel arch ribs , curved steel box girder and inclined suspenders , and the structural behavior of the bridge is particularly complicated 摘要中山市蝴蝶拱桥是由倾斜钢拱肋、曲线钢箱梁和倾斜吊杆组成的多元空间结构，受力行为复杂。
The cables fasten on the arch rib can make the bridge more beautiful , at the same time , these cables can share in the load of the arch rib , raising the arch rib of whole inflexibility , strengthened the stability of the whole bridge 拱上作用的斜拉索不但使桥梁更加美观,而且分担了拱肋承担的荷载,提高了拱肋的整体刚度,增强了全桥的稳定性。
On the basis , the effect of different factors such as the sloping angle of arch ribs , the stiffness of bridge deck system , the effect of non - orientedly conservative loadings of the hanger and tie bar etc is discussed 此外，采用线弹性方法，就拱的吊杆的非保向力效应、桥面系的刚度、横撑布置形式、拱肋侧倾角等因素对该桥整体稳定性的影响展开探讨与研究。
Suspender is the most important bearing member in cfst arch bridge . their tension not only applies in design checking computation of suspender inner force but also is external force during calculating inner force of arch rib 作为钢管混凝土拱桥中重要受力构件-吊索（杆） ，吊索（杆）内力既可以用于吊索（杆）内力设计验算，也可以作为拱肋内力计算时的外荷载。
4 ) the lateral elastic stability of the arch rib with 3 - dimention fem program is analyzed , some influence factors such as suspender , arch rib and wind brace etc . are comprehended . the results may ensure the construction and be useful to designers 采用空间有限元程序分析拱肋的弹性稳定性，了解拱肋、风撑、吊杆等因素对稳定性的影响程度，以指导设计并确保施工安全可靠。
Taking the caiyuanba changjiang river bridge in chongqing as an example , this paper makes a study of the effect of tilting angle of basket handle arch rib on the stability of the overall arch bridge and gives the rational tilting angle of the arch rib , using the finite element method 摘要以重庆菜园坝长江大桥为例，利用有限元方法研究提篮拱的拱肋侧倾角对全桥稳定性的影响，给出拱肋的合理侧倾角。
In virtue of finite element program , this paper calculates the model of rc - masonry combination arch bridge in the stages of construction and use in this paper . based on these data , it analyzes the structure behavior of the reinforced concrete arch ribs and the masonry arch ribs using methods of inner force and stress 本文借助有限元程序对rc -石砌体组合拱桥的计算模型进行了施工阶段和使用阶段的计算，并采用应力叠加和内力叠加两种方法对rc拱肋和石砌体拱板的受力特性进行分析。
However , for the long - span bridge , including the long - span cable - stayed arch bridge , the stability problem is always ineluctable , especially , the out - of - plane stiffness of the arch rib is far smaller than the in - plane stiffness of the arch rib , so , the out - of - plane stable problem is the problem that have to be considered 然而,对于大跨度桥梁而言,包括大跨度斜拉拱桥,稳定性问题始终是不可避免的,尤其是拱肋的面外刚度要远小于面内的刚度,所以,面外的稳定问题是必须考虑的问题。
The cyclo - hoop effect which steel tubular has exert to the concrete shows the character of heterogeneous in the arch rib section , the same to the axial direction . the paper verifies the change of the material poisson ration and the concrete grade will make the cyclo - hoop effect obvious alteration , the change of the cyclo - hoop effect and the stress redistribution of the section produced by the shrinking and creeping of the concrete and the expensive concrete on the section 在钢管混凝土拱肋断面上，钢管对内填混凝土的环箍效应具有非均匀性，在拱轴方向上环箍效应也呈现非均匀性。验证了材料的横向变形系数、混凝土标号等参数的变化将引起环箍效应的明显改变；混凝土的收缩、徐变和膨胀混凝土的应用导致钢管混凝土的环箍效应发生变化并使截面的应力发生重分布；并总结了其变化的基本规律。
