YIELD STRENGTH EVALUATION METHOD FOR POLE-BEAM JOINT PART IN HOLLOW CIRCULAR STEEL PIPE POLE, DESIGN METHOD FOR YIELD STRENGTH EVALUATING METHOD, RING-LIKE REINFORCING PART DESIGNED BY THE DESIGN METHOD, AND POLE- BEAM JOINT PART HAVING RING-LIKE REINFORCING PART

摘要

PROBLEM TO BE SOLVED: To provide a yield strength evaluation method for a pole-beam joint part in a hollow circular steel pipe pole provided with a ring-like reinforcing part to which a plurality of beams are fitted from arbitrary directions.;SOLUTION: When a load distribution pattern (hereinafter referred to as load distribution pattern reference force) in which design member axial force of a beam flange is suitably scaled at each of a plurality of loads to be examined is set, and yield strength of the post-pole joint part is expressed as a yield strength factor to the load distribution pattern reference force, the steel pipe wall surface of an effective peripheral length part near the beam fitting part is bent and deformed to be resolved into a yield strength factor to the flow of force (hereinafter referred to as front shearing force) transmitted in the axial direction of the steel pipe and a yield strength factor to the flow of force (hereinafter referred to as ring body force) transmitted in the ring peripheral direction by bending of the ring-like reinforced part and the steel pipe plate near the ring-like reinforced part, and the addition value of the yield strength factor to the front shearing force and the yield strength factor to the ring body force is taken as a yield strength factor in load to be examined to evaluate the yield strength.;COPYRIGHT: (C)2004,JPO