钢管混凝土刚架系杆拱桥静力性能研究与吊装扣索索力确定-桥梁与隧道工程专业论文.docxVIP

AbstraetFrame Abstraet Frame tied concrete-filled steel tubular(CFST)arch bridge has been widely used in the road and city bridge in China because it has light structure、beautiful model、 super crossing ability．The research of frame tied concrete—filled steel tubular arch bridge has been deepened at present． A historical review of arch bridges is introduced in this paper including their origin、early development、their condition of research and their trend of development． On the basis of MAOCAOJIE Bridge of NANXIN County in HUNAN Province，the static character of frame tied concrete．filled steel tubular arch bridge has been studied in this paper．A method is put forth in the paper which is a computational method of cable force in the arch bridge assembled by means of cable suspend erection method． The research of this paper includes mainly several parts： 1 According to the MAOCAOJIE Bridge of NANXIN County in HUNAN Province，by means of general software which are ANSYS and BDCMS，the paper makes a research on the static character of frame tied concrete—filled steel tubular arch bridge and builds the space computing model and plane computing model，and analyzes and compares their results．It also analyzes the different design parameters(ratio of rise to span and coefficient of arch axis)and the shrinking creep of concrete to affect the internal gross forces、stress and displacement of any control cross section of arch bridges． 2 A computational method of the forward-iteration cable force is given in the paper in the arch bridge assembled by means of cable suspend erection method after analyzing the using scale of finished methods of present CFST arch bridge．The method is described as the following．An object state is gotten with the forward—calculation presuming the controlling cable tensing forces．We can modify the controlling cable tensing forces to minimize the difference values between the result and the predetermined value of the object state by the least squares metho