Overview
A new technique is presented in bridge composite, the part of the adhesive bond. Prefabricated plate segments on the steel beams are relocated; these stick together to harness and then establish the bond between the produced slab and the underlying steel beam. The preparation of this compound is accomplished by a cement grout injection into a volume-optimized gap between the two.
The design of these joints, their grouting with the injection material, its capacity to boost power transmission and to determine the required bias for overprinting of adhesive joints between the plate segments are the subject of investigations summarized in this project.
The construction method for precast segmental deck slabs - partial bond.
Optimise method of construction. In particular the injection of the joint with the cement grout (erection of steel girdler, deck segments, gluing of the segments, longitudinal prestressing of the deck, injection of the sealing rubber hose, wetting of the composite joint surface, injection of the composite joint, wearing surface).
A. State of the art report
B. Application for composite bridges
C. Analysis of problems
D. Recommendation for construction
Funding
Results
A new technique for composite bridge construction - partial bond.
Composite action consists of placing precast concrete deck elements onto steel girders, then gluing them together with the aid of prestressing and finally injecting cement grout between the steel and the concrete to achieve the bonding action.
The best solution for this partial bond action was the combination of an adhesion layer with a vertical corrugated plate welded on the steel girdler, the surface of wash-concrete in the connection and the injection with a high quality cementious grout. Compared to normal composite joints with shear studs the capacity of the partial bond joint was doubled in the push-out tests.
The research has shown that the final prestressing degree can be optimised if the prestressing is applied before the connection of the concrete segments to the steel girder. Design charts and simple formulas are given which can be used for a quick per-design.