CONNECTING FORCE BETWEEN CONCRETE SLAB AND STEEL GIRDER AT INTERMEDIATE CROSS BEAMS IN COMPOSITE TWO-I-GIRDER BRIDGES

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In composite two-I-girder bridges, at the position which intermediate cross beams are installed, lalge stress transfer between concrete slab and steel girder is produced. Since the rotation of upper steel flange is restricted by vertical stiffeners, large stress transfer occurs. This paper describes on-site experimental results and based on them, the design method of studs is proposed. The experiment includes a long-term observation and vehicle loading. It is predicted, under the condition that the headed stud is not installed top of the vertical stiffeners, that no fatigue damage in studs and welding part between upper flange and vertical stiffener occurs within 100 years or so. Furthermore, the way of finite element modeling of the connecting part for estimating the stress level is also presented.
社団法人　土木学会の論文