OVERHANGING CHORD CONSTRUCTION AND PRE-STRESS INTRODUCING METHOD IN OVERHANGING CHORD BEAM CONSTRUCTION

摘要

PURPOSE:To make it possible to economically form a large span construction by using a tension device placed to strut members formed in the shape of a pantograph and/or clamping devices provided to tension members to induce pre-stress to the tension members. CONSTITUTION:Beam members 10 and 10 are connected to tension member 30 and 31 arranged to the lower parts of them through strut members 11... to form an overhanging cord beam construction T. The strut members 11... are made in the shape of a pantograph, the top section thereof is joined with the beam members 10 and 10, the bottom section thereof is joined at an intermediate position between the tension members 30 and 31, and right and left corner sections are connected with a tension device 27. After that, the right and left corner sections are clamped in the direction to come close to each other with the tension device 27, and the strut members 11... are capable of extending in the up and down directions. Clamping devices 62, 62, 66 and 66 are provided to both ens and/or intermediate section of the tension members 30 and 31, and the tension members 30 and 31 are capable of tension. The tension device 27 and/or the clamping devices 62, 62, 66 and 66 are used to introduce required pre-stress to the tension members 30 and 31.