General Specification For Dimensions And Deviations Of Concrete-filled Steel Tubular Members

1, the size of concrete-filled steel tube components can be divided into steel pipe, strip, strengthen the ring, beef legs and connecting the size of the web and other items, deviation detection can be divided into steel pipe column installation deviation and stitching assembly deviation and other items. 2, component steel pipe and the size of the steel pipe can be divided into steel pipe diameter, wall thickness and length items.

　　The outer diameter of the steel pipe can be measured by a special fixture or ruler, and the thickness of the steel pipe can be measured by ultrasonic thickness gauge, and the length of the steel pipe can be measured by the ruler or laser rangefinder.

　　3, the minimum size of concrete-filled steel tubular members, the limit of the ratio of outer diameter to wall thickness and the allowable slenderness ratio of members shall be evaluated according to the CECs and 28 of the design and construction regulations of concrete filled steel tubular structures.

　　4, the detection of the size of lattice column can be divided into the length of the bar, width, thickness and the bar and column axis of the eccentric and other items, the size of the bar, the use of the method of measurement.

　　5, the beam and column joints of the cow leg, connected webs and the size of the strengthening ring, can be ruler detection, in which the setting and size of the reinforcement ring should be "concrete-filled steel tubular structure design and construction regulations," CECs, 28 of the provisions of the assessment. 6. The inspection of the deviation of the assembling of the steel tube can be divided into longitudinal bending, ellipse, pipe end unevenness, the combination error of the fitting and the combination error of the components.

　　The test method and evaluation index can be carried out according to the CECs and 28 of the design and construction rules of concrete-filled steel tubular structure. 7, the installation deviation of the steel pipe column is divided into the column axis and the base axis deviation, column verticality and other items, its detection methods and evaluation index according to the "Steel tube concrete structure design and Construction Code" CECs, 28 determine.