A structure of prestressed preflex steel composite beam prestressed by each construction steps

摘要

The present invention places the bottom strand to resist the beam weight, the slab weight of the concrete weight and the cross beam on the ganghyeong lower flange lower portion constituting the composite beam prestressing steel to the bottom of the lower flange and the tension after the beam before the slab concrete, and curing and fixing the end, slab concrete, and curing after sikimeuroseo fixing after stress in the predetermined distance from the location of the upper strand to withstand the live load and bridge the upper load (rails, pavement, and so on) on top of the lower flange of the ganghyeong from the beam end can produce a beam in the economy over the effective beam cross-sectional configuration, to reduce the amount of strands of the required, and the beam ends local installation prestressing steel composite beam structure that can prevent the stress concentration can be prevented beam end crack in It relates.