Reinforcement method of coaming plate for oblong inspection hole of steel box bridge tower

Abstract

The invention provides a hoarding reinforcing method for a steel box tower bridge oblong access hole. The method comprises the steps that (1) according to the geometric dimension and material characteristics of the plate with the access hole, namely the perforated plate, the compressive strength limit after holing and weakening is worked out; (2) according to the geometric characteristics and actual engineering requirements of the perforated plate, a proper reinforcing mode and the dimensions of hoardings are determined; (3) the compressive strength limit after reinforcement is worked out; (4) the strength of the perforated plate after reinforcement is worked out, and if the design requirement is not met, the steps (2)-(4) are conducted repeatedly till the compressive strength limit after reinforcement meets the design requirement; and (5) the hoardings are welded to the perforated plate according to the requirement. The hoarding reinforcing method is reliable in theory, clear in logic and easy to implement.

Description

technical field [0001] The invention relates to the technical field of steel structure design and construction, in particular to a method for reinforcing a coaming plate of an oblong inspection hole of a steel box bridge tower. Background technique [0002] Steel bridge towers have the advantages of small size, light weight, good seismic performance, and short construction period. In recent years, with the successive completion and construction of bridges such as the Tingjiu Bridge in Hong Kong, the Third Nanjing Yangtze River Bridge, the Taizhou Yangtze River Bridge, and the Ningbo Bund Bridge, steel bridge towers have been more widely used in bridge construction in my country. Compared with concrete bridge towers, steel bridge towers can be made lighter while meeting the same bearing capacity. They are manufactured in factories and then assembled on site. The construction is convenient and fast, and the construction period can be shortened. Although the engineering cost o...

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Problems solved by technology

[0005] The above-mentioned patents are not applicable to the situation where the shape of the hole is oblong and the steel plate is under in-plane compression conditions, and it cannot be used as a reinforcement method for opening passage holes inside the steel bridge tower, and it does not provide the pre-reinforcement and post-reinforcement methods. Strength treatment method

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