The software ansys6 . 0 is used to analysis the stability of the state after construction of tongwamen bridge , linear method is used in analyzing the finite element model of the bridge , the coeffient of stability of different state after construction is given . on the basis , the effect of different factors such as the arrangement of lateral brace , 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 . the different coefficients of stability of changing these factors are given , so the factors that are vital to the lateral stability of x - type arches are found , and the rationality of the methods taken to enhance the lateral stability of tongwamen bridge is evaluated 本文应用有限元分析商业软件ansys6 . 0 ，采用线弹性方法，通过对该桥的空间有限元模型进行稳定性分析，得出其成桥运营阶段各种工况下的稳定安全系数。在此基础上，本文还通过有限元模型分析，就拱的矢跨比、吊杆(立柱)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。文中给出了各因素变化情况下的稳定安全系数，指出了对钢管混凝土提篮拱横向稳定性有显著影响的因素及其合理变化范围，并对铜瓦门大桥提高横向稳定性的措施的经济合理性进行了分析。
On basis of the character of the structure at the stage of construction , the stress balanced method was developed to decided the forces of cables and the stresses of the arch rib sections , which is according to the normal stress controlling conditions on the top and bottom of arch rib section and considering the influence matrix 针对这一受力特点，本文根据拱肋截面上、下缘应力平衡条件及影响矩阵的概念，发展了应力平衡法，用以确定拉索的合理索力，从而使拱助结构受力合理并具有理想的线形。
Abstract : for building a long - span concrete - filled steel - tube ( cfst ) arch bridge with an integrated installation tower , one of the key technologies is to control the arch rib alignment of the bridge . based on the theoretical analysis and the measuring results , the designed arch rib alignment of a being built bridge can be guaranteed quality by adjusting the length of the cables on - line . the engineering application shows , by using the on - line adjusting cable technology , that it is economical and in safety for building a long - span cfst arch bridge 文摘:在大跨度钢管混凝土拱桥塔架/扣架一体化缆索吊装施工中，其关键技术之一是主拱线形控制.在理论分析和现场测试的基础上，动态调整扣索长度，可保证钢管拱肋的设计线形.工程实践表明：将扣索动态调整技术应用于大跨度钢管混凝土拱桥的吊装施工中，可降低工程造价，保证施工质量
The paper puts great emphasis on studying the mechanical performance and the carrying capacity of concrete - filled steel tubular ( cfst ) , verifies the cyclo - hoop effect which steel tubular has exert to the concrete in cfst through the tridimensional finite element analysis of the entity of the arch rib , and proves that the cyclo - hoop effect is utilized to increase the axial compression cfst member carrying capacity 本文着重研究了钢管混凝土结构的力学性能及承载能力，通过对拱肋实体所作的三维有限元分析，验证了钢管混凝土拱桥中钢管对混凝土的环箍效应，证明了由于环箍效应的存在，使内填式钢管混凝土轴压承载力大大提高。
This paper presents the structural design of the main bridge of lhasa river bridge , makes a deep - going study of the key techniques for design of the bridge , such as the reasonable span length ratio of each span of the 5 - span girder and arch hybrid structure , mechanical behaviour of the dual arch ribs , and section of the continuous girder tie beam , and also works out rigidity and stress conditions of the continuous girder tie beam and stress conditions of the concrete - filled steel tube arches of the main bridge 摘要介绍了拉萨河特大桥主桥结构设计情况，对于五跨梁拱组合桥梁各孔跨合理的跨度比、叠拱的受力行为及连续梁系杆截面形式等设计中的关键性问题进行了深入的研究，给出了主桥连续梁系杆的刚度和应力情况、钢管混凝土拱的应力情况。
Summarizing and analyzing the key achievement and the significance of the current research on temperature effect on steel tube concrete arch bridge the paper points out that a further relevant study should be undertaken , and attention should be paid to the respects such as simple quantum of base temperature , arch rib temperature field under complicated conditions , arch rib temperature of various styles for truss members and the nonlinearity temperature difference of the system etc 摘要总结分析当前钢管混凝土拱桥温度效应的研究意义及主要研究成果，对于钢管混凝土拱桥温度效应进一步的研究，建议应注意基准温度的简单定量、复杂条件下的拱肋截面温度场、各种截面形式的拱肋温度和体系非线性温差等几个方面的间题。
This paper emphasizes on the construction control of concrete arch bridge , which is constructed by the precast segmental cantilever method . through analyzing this new erection method , it is considered that the cable forces directly influence the stresses of arch rib sections and the deflections of the arch axis , in addition , the stress of the arch rib section is the key factor in construction control 本文以悬臂拼装钢筋混凝土拱桥的施工控制为研究对象，结合工程实例，分析了大跨径钢筋混凝土拱桥的悬臂拼装施工方法，认为施工过程中拉索的索力直接影响拱肋截面的应力和拱肋轴线的标高，拱肋截面的应力是悬臂拼装拱桥施工控制的关键因素。
At last , on the basis of the linear finite element model , the effect of different factors such as the stiffness of the arch rib , the arrangement form and the arrangement position of the lateral brace , the sloping angle of arch ribs , ratio of the width to the span , the form of the hangers , the stiffness of bridge decks , cables etc is discussed 最后,本文还通过有限元模型的分析,就拱肋自身刚度、横撑的布置形式和布置位置、拱肋内倾角、宽跨比、吊杆形式、桥面刚度、斜拉索等方面对该桥的整体稳定性的影响展开讨论和研究。
Then , a thorough discussion and sum ? p about the main construction process of cfst tied ? rch bridge without wind bracing is presented in the paper in association with the construction practice of the bridge . in addition , the author put emphasis on the static calculation of two point integral hoisting construction method in single cfst arch rib . futhermore , the stabilization of arch rib in construction and service stage are analyzed detailedly 本文结合该大桥的施工实践，对无风撑钢管混凝土系杆拱桥的主要工艺施工流程进行了全面论述和总结，并重点对单片钢管拱肋两点整体吊装的结构受力进行了静力计算及对拱肋在施工和运营阶段的稳定进行了分析。
The paper build a plane model of the whole bridge based on the fem , and analyze the internal force and structural displacement changes in every damage circumstance . the data reflect that the damages in arch rib in the tip will make internal force of some sections increased , accordingly the stability and the durability of the structure reduce ; the damages in the arch foot will change the structure system ; and the displacements of abutments will develop great accessional internal force , and deform the main arch and even crack , accordingly change the system of the structure 论文建立了全桥的平面有限元模型，分析了在各种病害情况下全桥的内力及结构位移的变化，计算数据反映了，拱顶拱肋损伤会造成某些截面的内力增大，结构的稳定性和耐久性降低；拱脚损伤可能引起结构体系改变；墩台位移会使上部结构产生较大的附加内力，使拱圈变形甚至于开裂，从而导致结构的受力体系发生改变等。
