Leans Arch Bridge Stability Analysis And Construction Control Study Response

Leaning type arch bridge because no cross connection between the main arch rib, the lateral stiffness of the weaker, cross the bridge to the stable tend to become one of the key issues in design. At the same time, this kind of arch bridge bearing is very complex. In order to make this kind of arch bridge during construction stage and operation stage in reasonable stress state, the stability of the structure, construction control and the design parameters of the research is of great significance. This paper, taking guangzhou zengcheng bridge as the research background, mainly for the following research work:First, discusses the design of the bridge in Guangzhou Zengcheng key issues, the finite element model validation after the main bridge to bridge internal force, stress, displacement and other requirements are met, while also providing theoretical data for the later construction monitoring;Then, review the stability theory to explain a variety of instability calculation method to study the span ratio, Comparative study on the different values of each parameter,the impact of arch beam stiffness ratio and other parameters inclination arch leans on the main bridge stability parameters obtained affect the stability of the main bridge law;Finally, each of the boom active and passive stretching, side cross tie rod and tie rod in cross-tensioning sequence and side tie rod tensioning times across a comparative study,. The results showed that:passive tension, the first side of the cross and then cross the tie rod tensioning sequence and side spans Tied by changing the number and order of installation tensioned bridge deck structure can greatly reduce stress and enhance structural stability.The research results provides advice and guidance to Guangzhou Zengcheng Bridge construction, their ideas and methods may also provide a reference for this type of bridge design.