Cable-stayed bridge anti-seismic steel inclined strut and construction method thereof

Abstract

The invention relates to the technical field of cable-stayed bridge main tower construction, in particular to a cable-stayed bridge anti-seismic steel inclined strut and a construction method thereof. The steel inclined strut is arranged between a left tower limb and a right tower limb of a diamond-shaped cable-stayed bridge, transverse connection of the left tower limb and the right tower limb is added, the overall rigidity of a diamond-shaped main tower is improved, and under the condition that a cable-stayed bridge bearing platform and the cross section and reinforcing bars of the main tower are not increased, the shock resistance of the cable-stayed bridge is improved; the cable-stayed bridge main tower comprises an upper tower column and a lower tower column, the upper tower column comprises a first left tower limb and a first right tower limb, the lower tower column comprises a second left tower limb and a second right tower limb, a second steel inclined strut, a third steel inclined strut and a fourth steel inclined strut are installed between the first left tower limb and the first right tower limb, and a first steel inclined strut is mounted between the second left tower limb and the second right tower limb; the first steel inclined strut and the second steel inclined strut are inserted anchoring type steel inclined struts, and the third steel inclined strut and the fourth steel inclined strut are surface anchoring type steel inclined struts.

Description

technical field [0001] The invention relates to the technical field of construction of a main tower of a cable-stayed bridge, in particular to an anti-seismic steel diagonal brace of a cable-stayed bridge and a construction method thereof. Background technique [0002] More than two-fifths of my country's land area is within the seismic intensity area above seven degrees. As an important bridge structure in traffic engineering, long-span cable-stayed bridges are widely used in my country. Therefore, if a long-span cable-stayed bridge is damaged in an earthquake, it will bring serious economic losses and social impacts, and even endanger life. Safety. [0003] Structural anti-seismic technology has experienced decades of development and technological innovation. In the past, the traditional anti-seismic method usually used the method of making the structure "hard-resistant". The so-called "hard-resistant" refers to various methods, such as: Enlarging the cross-section of the...

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Problems solved by technology

However, this traditional method is no longer applicable today when people have higher and higher requirements on the performance or span of the structure, because it is not only uneconomical, but also has various disadvantages in other aspects, such as: simply adding The cross-section of a large structure means that other usable areas become smaller; for the method of increasing reinforcement, if it is in the 9-degree area, the amount of reinforcement is already large, and if it continues to increase the reinforcement, it may lead to some structural problems. The reinforcement at the joints of some components and structures is too dense, which makes the construction too difficult, and may also cause the formation of reinforced concrete hollows, which is not good for the structure

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