BUTT-JOINT AND METHOD FOR COMPOSITE COLUMNS CONNECTION WITH FLOOR STRUCTURE Russian patent published in 2005 - IPC

FIELD: building, particularly composite reinforced concrete frames of multistory buildings having columns bearing increased load.

SUBSTANCE: butt-joint includes end parts of upper and lower columns of reinforced concrete frame arranged along common vertical axis and having a gap formed between column edges for floor structure installation in-between. End column parts are provided with transversal steel sheets secured to columns. Columns have pockets formed on column sides near ends thereof. Ends of reinforcement bars extending out of columns and inserted in floor structure are formed as threaded pins connected by nuts to transversal steel sheets. Located in mortar between sheets are aligner nuts directly supporting upper column. Pockets are caulked by fast-hardening fine concrete. Method of butt-joint forming includes locating and securing lower column; arranging floor structure above lower column; fixing threaded pins on upper end of lower column; securing mounting fixing frame above floor structure on upper pin ends; removing above frame after floor structure concrete hardening up to obtaining demanded strength thereof; screwing aligner nuts on threaded pins; installing upper column on lower one and adjusting upper column in demanded vertical position and by above marks with the use of aligner nuts; displacing upper column upwards, pouring mortar on lower column end and immediately putting upper column on non-hardened mortar so that upper column rests upon aligner nuts; removing excessive mortar from under the column; finally fixing upper column from upper end thereof by nuts arranged in upper column pockets and caulking pockets with fast-hardening fine concrete.

EFFECT: increased butt-joint reliability and load-bearing capacity, increased manufacture reliability of building frame erection.

2 cl, 4 dwg