In chapter 4 , the synthetic evaluation method is proved feasible and practical through being applied to the practical bridge and reflects the safety status of the fifth jianghan bridge . the author sets up a safety evaluation model of cfst arch bridge and discusses that how the method of the synthetic evaluation method is applied in the existing bridge in detail . at the same time a variable weight is presented in the safety evaluation 第四章以武汉江汉五桥为工程背景，建立了中承式钢管混凝土拱桥安全性评价模型，按照分解、判断、综合的步骤，综合应用前述的评价理论对江汉五桥进行安全性评价，同时探讨了变权原理在综合评价方法中的应用。结果表明本文提出的评价方法是实用和合理的。
This paper uses of the actual mechanics form , cantilever bending stiffness is adopted in the mega structure , however shearing stiffness in the sub structure . based on the complex mode theory , this paper gains the expression of dynamical response of the system based the model of municipal no . l building of tokyo city and analyses the affection of the main parameters ( stiffness and damping ) on the two configurations ( sustaining type and hang type ) . the results indicate that the rational stiffness of the sub structure can control the deformation of the mega structure perfectly , but the acceleration of the sub structure increases at the same time 本文采用了更接近实际的力学模型，主结构采用弯曲刚度，子结构采用剪切刚度，利用随机振动复模态理论，推导了巨型框架减振结构的动力响应表达式，并以日本东京市政一号楼为基本模型，讨论了巨型框架减振结构两种结构形式(座承式和悬挂式)的主要参数(刚度和阻尼)对减振效果的影响，结果表明：与普通巨型框架结构相比，减振结构通过合理选择子结构刚度，可以较好的控制主结构在顺风向脉动风作用下的位移响应，从而提高结构的安全性，但与此同时，子结构自身的加速度响应也有了一定程度的提高。
It is a top load bridge with a clear span of 288m , which is maximum one of the same structural system in asia . the main arch rib uses 8 steel tube of 920mm joined by web members and transverse truss to form a space truss . the soldier piles on the arch are made of bent frame to make the shape both artistic and novel 梅溪河大桥为一净跨达288米的上承式钢管混凝土拱桥，是目前亚洲同类桥型中跨度最大的桥梁，其主拱肋采用8根920mm的钢管，通过腹杆及平联形成钢管混凝土空间桁架，拱上立柱亦采用钢管混凝土排架，造型新颖美观。
According to the bearing load institute of mainly bearing component , the basic form of bridge can be classified into beam bridge , arch bridge , rigid frame bridge , suspension bridge and assembly system bridge etc . also according to the location of trip lane , it can be classified into top travel bridge , middle travel bridge and lower travel bridge 桥梁的基本形式按桥梁主要承重构件的受力情况可分为：梁桥、拱桥、刚架桥、悬索桥、组合体系桥等；按行车道的位置又可分为上承式桥、中承式桥和下承式桥。
2 . detailed introductions are given for the design scheme and engineering situations . 3 . the construction design , construction scheme and construction technology of ballastless embedded sleeper track are researched in combining with the constructing of the ballastless track on shahe bridge inside b26 - 1 section on qin - shen railway . the design , application and construction measure for the adjustable up - supporting bracket for track panel are particularly described and expatiated 结合秦沈客运专线b26 - 1标段内沙河无碴轨道实际施工情况，对长枕埋入式无碴轨道的总体施工安排、施工方案以及施工工艺进行了研究，同时重点对长枕埋入式无碴轨道的上承式可调式轨排支撑托架的设计、使用和施工测量控制进行了细致地说明和阐述。
