Measuring device of cross-section temperature field of double circular steel tube concrete column and mounting method thereof

Abstract

Disclosed are a measuring device of the cross-section temperature field of a circular steel tube concrete column and a mounting method thereof. The measuring device is composed of a main bar, branch bars, a stabilizing bar, steel bars and thermal couples. The main bar is connected with the branch bars perpendicularly, the branch bars are divided into three groups, and the other end of every group of the branch bars is connected into a whole through the stabilizing bar. The main bar, the branch bars and the stabilizing bar are formed by pouring cement mortar. Steel bars are pre-embedded inside the main bar, and the thermal couples are pre-embedded inside the branch bars. When the measuring device is mounted, the end portions of an inner-layer circular steel tube are provided with two grooves, the end portions of an outer-layer circular steel tube are provided with two round holes, the center line of grooves is aligned with that of the round holes, the measuring device is inserted inside the grooves of the inner-layer circular steel tube, the grooves on the inner-layer circular steel tube are sealed by welding small steel plates, and concrete is poured to the column end. The measuring device of the cross-section temperature field of the circular steel tube concrete column is simple in structure, accurate in location, good in economic efficiency and capable of well measuring the cross-section temperature field of the circular steel tube concrete column in a fire test.

Description

technical field [0001] The invention relates to the technical field of measuring the temperature field of the cross-section of a double-circular steel pipe concrete column in a fire test. Background technique [0002] The double-circle concrete-filled steel pipe column is a composite column formed by setting the inner round steel pipe inside the outer round steel pipe, and pouring concrete inside the two-layer steel pipe. It has the advantages of high bearing capacity, good plasticity and toughness, and good fire resistance. In the experimental study of the fire resistance of double-circular concrete-filled steel tube columns, it is necessary to measure the temperature field of the cross-section of the column. Since there are steel pipes inside and outside the double-circular concrete-filled steel tube columns, it is not easy to arrange temperature measuring equipment when measuring the temperature field of the entire cross-section , so there is a need for a cross-section te...

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Problems solved by technology

[0003] In order to overcome the problem that it is not easy to arrange temperature measuring equipment for the double-circular concrete-filled steel pipe column in the fire test, the invention discloses a measuring device and installation method for the temperature field of the cross-section of the double-circular concrete-filled steel tubular column. It has the advantages of high precision and good economy. This installation method is easy to operate and solves the problem of positioning of the measuring device and the problem of wires passing through the steel pipe.

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