中承式钢管混凝土拱桥的结构体系与力学性能研究

1、湖南大学硕士学位论文中承式钢管混凝土拱桥的结构体系与力学性能研究姓名：张辉申请学位级别：硕士专业：桥梁与隧道工程指导教师：赵跃宇20070321 催 1990 450m 乍 (1) (2) (3) ANSYS 乥 乥 (4) I AbstractIn recent years, our country economy stability increases and the scientific technology develops quickly, more investment isput into the fundamental facilities, we accomplish a l

2、ot of great construction of bridges and a large improvement also be madein bridge construction technology. With the high capacity, strong spanning ability,good seismic behavior and convenience of construction, Concrete-filled steel tubular(CFST) arch bridge develops rapidly and is a quickest-develop

3、ing structure of bridge, which was built since 1990. With the continuous development and mature of CFSTstructural theory, CFST arch bridges are developing in the direction of more large-spanand more large scale. At the same time, the application area and range are expandingcontinuously, and the larg

4、estspan of CFST arch bridges which have been built hasexceeded 450m at the present time. With the adaptable of CFST arch bridges rapiddeveloping, much favorable work has been done about the theory research of CFSTarch bridge, but these fall behind its development.In this paper, the structural system

5、, static and dynamic behaviors of half-through CFST arch bridge are made. And this study will offer a theoretical foundation for development of CFST arch bridge design. The specific research mainly included several aspects as follows:(1)According to the classification of the structural system,the st

6、ress characteristics and applicability of structural system, rigid-framed tied arch are discussed respectively. At the same time, the stress characteristics of half-through CFST arch bridge are analyzed. The classification and characters of suspender are discussed. Both of the inner force of tie-bar

7、 and the transverse structural style of arch rib are analyzed respectively.(2) The buckling safety factor of Maocaojie Bridge in dead load is calculated by using the analytical method of elastic stability. Then, the influencing factors of resistance to overturning are discussed. And the influence of

8、 width-span ratio, lateralconnections, disposal of suspender, ratio of rise to span and sloping angle to the stability of bridge are analyzed.(3)The natural frequency and natural mode of Maocaojie Bridge are calculated by using ANSYS, and the characters of different modes are analyzed. The influence

9、 of volumetric percentage of steel,sloping angle, ratio of rise to span, lateral connectionsII and width-span ratio to natural frequency and natural mode are discussed. At last, the aseismic performances of bridges areanalyzed by using the theory of responsespectrum.(4)The structural stress features

10、 of side-arch in the construction course of long span arch bridges with side-arch-body system are analyzed. At the course of cable-rope-hoisting constructionwhen the side-arch is used as balancing weight of main arch hoisting part directly the predominanceof structural stress and economicalperforman

11、ce of the side arch is explored and discussed. At the same time the cable-rope-hoisting construction course of Maocaojie bridge is taken as example in this paperThe local stress distributionthe integral stability and the advantage of the side-arch when used as main archhoisting balancing weight are

12、analyzedwhich cansupply reference for a kind of bridge that used the side-arch as balance part in the construction course.Keywords: Half-through; CFST; arch-bridge; dynamic; seismic responseIII 1 _ 2 1 偀 ( 581600) 1400 佪 催 乬 1.1 1.1.1 1 催 催 催 催 1(1) 催 催 催 (2) 偼 (3) (4) 1.1.2 1879 1901 Sewell 催 2060

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