| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of designing a composite beam optimizing the amount of steel to reduce the weight of the composite beam while securing structural stability in case of a fire of the composite beam even when omitting or reducing fire resistive covering for a steel beam. SOLUTION: The method of designing the composite beam has a first step for setting items of each member constituting the composite beam; a second step for obtaining the temperature of each member in case of the fire by analysis; a third step for leading out the shearing strength of a stud in case of the fire using the analyzed result of the second step; a fourth step for determining the integrity of a concrete slab and the steel beam by comparing the shearing strength of the stud led out in the third step, with steel stregnth in case of the fire, to lead out ultimate flexural strength at the high temperature of the composite beam according to the determined result; and a fifth step for verifying structural stability in case of the fire of the composite beam using the ultimate flexural strength at the high temperature led out in the fourth step. COPYRIGHT: (C)2005,JPO&NCIPI
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