Structure and method for converting stress state of prefabricated stand column

Abstract

The invention provides a structure and method for converting a stress state of a prefabricated stand column. The structure comprises reinforcing steel bars or reinforcing steel bar meshes which are axially arranged near an axial midpoint of the prefabricated stand column, and the reinforcing steel bars or reinforcing steel bar meshes are close to a surface of the prefabricated stand column. The method comprises steps that before the structure for converting a stress state of the prefabricated stand column is implemented, a stress state of the prefabricated stand column under the prefabricatedworking condition, the transportation working condition and the hoisting working condition is analyzed, under the working conditions of transportation and hoisting of the prefabricated stand column inthe horizontal state, the midspan of the prefabricated stand column can generate large bending moment, so a bottom surface of the prefabricated stand column in the transverse horizontal state becomesa main tension surface, and the situation that the cross section is cracked and even broken is likely to happen. The structure is advantaged in that starting from an angle of adjusting the bending moment difference of the prefabricated stand column, targeted stand column structure reinforcing measures are adopted, the stress state of the prefabricated stand column under various working conditionsis met, and therefore the stress state of the prefabricated stand column in the horizontal state is converted.

Description

Technical field [0001] The invention relates to the technical field of prefabricated column construction in the prefabricated bridge construction technology, in particular to a structure and method for converting a prefabricated column to a stressed state. Background technique [0002] Because the prefabricated components of the bridge pier columns are made into concrete products in the factory and transported to the site for installation, there is a big difference from the traditional on-site cast-in-situ method, which brings changes in the construction process and working conditions, mainly including prefabricated working conditions , Transportation conditions and hoisting conditions. Under these special conditions, the posture and force of the column members are very different from those under bridge conditions, which further leads to changes in the force of the component structure. For example, traditional methods are still used. Treating it will cause great security risks. ...

AI Technical Summary

Problems solved by technology

[0002] Because the prefabricated components of pier columns are made into finished concrete products in the factory and transported to the site for installation, there is a big difference from the traditional cast-in-place method, which brings changes in the construction process and working conditions, mainly including prefabricated working conditions , transportation conditions and hoisting conditions, and there are great differences in the posture and force of the column members under these special conditions and the bridge construction conditions, which further lead to changes in the force of the component structure. If the traditional method is still used treatment, it will create a great security risk

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