The paper deals with damages of transport constructions made of corrugated metal structures in the body of a railway track or a road during their operation. A constructive variant to restore the bearing capacity of structures was developed, which consists of installing an annular stiffening rib into the concave part of the corrugated metal profile. The main advantage of this method compared to the double corrugating method is the possibility of performing the reinforcement works during structure operation without interrupting the movement of transport vesicles. The study has proved that the reinforcement method significantly increases the carrying capacity of corrugated metal structures. A numerical finite element model was developed to determine the stress-strain state of structures made of corrugated metal structures reinforced with round stiffening ribs. The soil pressure on the corrugated shell in the model is taken into account with the application of radial and axial forces on the outer surface of the shell. It was determined that the most appropriate location of the ribs is in the centre of the building, where the reinforcement area corresponds to the width of the road or railway line. The advantage of this approach is the ability to more efficiently distribute the reinforcement material by selecting the ribs in the most loaded sections of corrugated metal structures.

No abstract

No abstract

Приведені результати випробувань монолітних залізобетонних плит, армованих сталевим профільованим настилом Н80А із болтовим опорним анкеруванням. Аналітично визначений коефіцієнт умов роботи настилу Н80А з болтовим опорним анкеруванням та зроблений висновок про перспективність даного способу анкерування. Приведены результаты испытаний монолитных железобетонных плит, армированных стальным профилированным настилом Н80А с болтовой опорной анкеровкой. Аналитически определѐн коэффициент условий работы настила Н80А с болтовой опорной анкеровкой и сделан вывод о перспективности данного способа анкеровки. The results of testing of monolithic concrete slabs, reinforced by corrugated steel decking type N80A with bolted bearing anchoring, are shown. Structure behavior factor of a steel decking type N80A with bolted bearing anchoring was analytically determined and conclusion about the prospects of this anchoring method was made. Ключові слова: Зовнішнє армування, статичне навантаження, незнімна опалубка, плита проїзної частини моста, сталевий профільований настил.

Purpose. Exploring by monolithic concrete slabs tests under static load of the possibility of corrugated steel decking bearing anchoring by bolted connections. Methodology. Test specimens were manufactured: fragment models of monolithic concrete bridge deck slabs with external reinforcement by corrugated steel decking with bearing anchoring by bolted connections. Specimens were tested under pure bending scheme by static load. Findings. During the tests carrying capacity of monolithic concrete slabs, reinforced by corrugated steel decking with bolted bearing anchoring, was determined; determined carrying capacity is comparable with such capacity of slabs with welded bearing anchoring. After the tests was made a conclusion that corrugated steel decking affects on the survivability of samples by preventing the progressive collapse of specimens. Originality. During the laboratory tests data of carrying capacity of specimens was received, nature of crack formation, features of work and destruction of specimens were described. Practical value. The experimental confirmation the possibilities and perceptivity of steel decking's bearing bolted anchoring appliance in bridge building were obtained.