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On-beam beam transporting simulation loading test method for prestressed concrete full-hole prefabricated box beam

A loading test and concrete technology, applied in the direction of elastic testing, machine/structural component testing, instruments, etc., can solve the problems of no clear reference specifications for highway bridges, and no rules for highway prefabricated beam testing and evaluation, etc., to achieve loading Experiment with reasonable effects

Active Publication Date: 2016-06-08
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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Problems solved by technology

For the static load test of railway bridges, "Prestressed Concrete Railway Bridge Simply Supported Beam Static Load Bending Test Method and Evaluation Standard" TB / T2092-2003 was issued, while there is no clear reference specification for road bridges, resulting in no basis for the detection and evaluation of road precast beams Follow

Method used

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  • On-beam beam transporting simulation loading test method for prestressed concrete full-hole prefabricated box beam
  • On-beam beam transporting simulation loading test method for prestressed concrete full-hole prefabricated box beam
  • On-beam beam transporting simulation loading test method for prestressed concrete full-hole prefabricated box beam

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Embodiment 1

[0040] A prestressed concrete whole-hole prefabricated box girder beam loading simulation loading test method, which is used in the construction of highway bridges to simulate the most unfavorable construction conditions, that is, the precast box girder single-span double-width girder under simply supported state. In the embodiment, it is specifically the highway project of the Hangzhou Bay Cross-sea Bridge and the Hangzhou-Ningbo Expressway. Except for some of the cast-in-place integral box girders, most of the rest are prefabricated box girders in factory format, transporting beams on beams, and erecting whole holes. The technical scheme is adopted for the first time in my country's land conventional highway bridges. Based on this project, two static load tests are carried out according to the static load bending test method of simply supported beams of prestressed concrete highway bridges to check the construction quality of the box girder and whether the test method is Feasibl...

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Abstract

The invention relates to a construction method of highway bridges and particularly relates to an on-beam beam transporting simulation loading test method for a prestressed concrete full-hole prefabricated box beam. The method is applied to the construction of the highway bridges and comprises the following steps: (A) simulating and testing loading conditions of one of two beams by virtue of a single-side static test; (B) simulating the load of a beam transporting vehicle by virtue of a multipoint loading manner, recording parameter differences of the stress state and the actual beam transporting vehicle effect of the tested beam when loads on 5 points / 7 points / 9 points / 11 points are respectively tested, and making comparison to select loading number of points; (C) carrying out finite element simulation on the specific loading working conditions of the tested beam under the loading number of points selected in the step B; and (D) if the stress state in the step C is normal, carrying out an actual load test, so as to detect the stress state, deflection and crack condition of the tested beam on each tested cross section. The on-beam beam transporting simulation loading test method for the prestressed concrete full-hole prefabricated box beam is applicable to the highway bridges.

Description

technical field [0001] The invention relates to a highway bridge construction method, in particular to a prestressed concrete full hole prefabricated box girder girder transport beam simulation loading test method. Background technique [0002] In recent years, my country's expressway transportation has developed rapidly, construction technology and quality standards have been continuously improved, and viaduct bridges account for an increasing proportion of construction projects in land conventional expressway projects. With the rapid development of high-speed railway construction, the prefabrication and assembly technology of bridges has been greatly developed, and significant economic and social benefits have been achieved. Due to the variety of prefabricated highway bridges, many influencing factors, and the implementation of relevant policies and systems is weak, unified technical standards for design, prefabrication, testing, and evaluation have not yet been formed in ...

Claims

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Application Information

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IPC IPC(8): G01M5/00
CPCG01M5/0008G01M5/0033G01M5/005
Inventor 申超管昱华王军彭良林胡勇肖艳琴官必忠陈俊王飞
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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