Abstract
The main tower of a polygonal line tower cable-stayed bridge bears most of the axial force transmitted by the stay cable and also bears the moment under certain unbalanced load. For a polygonal line tower cable-stayed bridge, the main tower has a bending corner and the direction of huge axial force transmission changes at this bending corner where the axis of the main tower changes. This study examined a cable-stayed bridge with a single cable plane in Shenyang and used model test and finite element numerical comparative analysis to analyze the mechanical properties of the key parts, including the main tower bending corner of the concrete polygonal line tower. The results show a serious stress concentration phenomenon at the bending corner of the main tower but a small range of high stress area. After the stiffening plate is set at the corner, the stress concentration coefficient of the bending corner section decreases and the stiffening plate eliminates the out-of-plane bending phenomenon of the tower wall at the middle span side as vertical tensile stress occurs in the stiffener at the bending corner. Based on these results, the design should be improved to increase the angle of the stiffening plate corner and appropriately strengthen the configuration of the vertical main tensile steel bar and the surface anticracking steel mesh inside the stiffening plate.
Highlights
There have been studies of a cable-stayed bridge with leaning tower, the mechanical properties of the main tower of a prestressed concrete cable-stayed bridge have not been studied
Six symmetrical load loading tests were carried out on the test section of the broken-line bridge tower at the bridge completion stage to determine the stress of the test section of the main tower under constant load and live load. e results indicated that the corner of the main tower should be the focus of the design control, as there is a serious stress concentration in this part
The effect of the stiffening plate to reduce the maximum compressive stress of the corner section is limited, the stress distribution diagram revealed that the use of the stiffening plate eliminates the external bending of the mid-span tower wall, so that the stress distribution of the corner section of the main tower conforms to the assumption of a flat section
Summary
A single cable plane cable-stayed bridge was the focus of this study. e main bridge’s length is 420 m, the side span is 89 m, the middle span is 242 m, the main beam material is C50 concrete, and the section is single box with three rooms. A single cable plane cable-stayed bridge was the focus of this study. E main bridge’s length is 420 m, the side span is 89 m, the middle span is 242 m, the main beam material is C50 concrete, and the section is single box with three rooms.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
