Method of analyzing load effect of pre-stressed concrete beam bridge

Abstract

The invention discloses a method of analyzing the load effect of a pre-stressed concrete beam bridge. The method comprises the steps that based on the actual traffic volume of the to-be-analyzed bridge, its equivalent fatigue load spectrum is obtained by equivalent classifications; based on the fatigue load spectrum of the to-be-analyzed bridge, the stress time from the most disadvantaged position of the principal tensile stress response is obtained; based on the tensile stress time of the to-be-analyzed bridge, the stress cycle data of the actual bridge are extracted and obtained. The invention provides the method of analyzing the load effect of the pre-stressed concrete beam bridge, based on the actually measured traffic data of the to-be-analyzed bridge and using a data simulation method, the stress cycle data of the to-be-analyzed bridge are obtained, compared with the prior art, the method is scientific in theory, reliable and scientific in analyzed result, and high in applicability, and is systematic and general and has practical engineering significance.

Description

technical field [0001] The invention relates to the technical field of bridge load analysis, and more specifically, relates to a method for analyzing the load effect of a prestressed concrete girder bridge. Background technique [0002] The research and analysis of bridge load effects is an important topic related to the safe operation of bridges. At present, the United Kingdom, the United States, Japan, the European Union and other countries have carried out a lot of research work, and have given corresponding fatigue design in their respective bridge design codes. Load spectrum or fatigue vehicle model, among which the research on the fatigue load spectrum of the British code is the most comprehensive, and its formulation method has also been emulated by many countries. [0003] Compared with other countries, the research and analysis of highway bridge fatigue codes in my country is relatively lagging behind, resulting in the current fatigue design of highway bridges mostl...

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Problems solved by technology

[0004] At present, many domestic scholars have carried out a lot of research on the fatigue load spectrum of bridges applicable to China, and summarized a lot of valuable experience. However, in the actual bridge design, management and operation, it is often necessary to accurately calculate the load effect of different vehicle types on prestressed concrete girder bridges of different structures, but the current domestic research on this aspect is mostly lack of systematic and general

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