28
O. Shymanovskyi et al.
Fig. 12 Schematic structural diagrams of the most likely destruction and reconstruction of the road
part of the Darnytsky rail-road bridge: a superstructure after destruction of span 3–4; b superstructure
after reconstruction
Two design solutions of a new single-span structure are considered, the first of
which is a steel–concrete superstructure and the second one is a steel girder superstructure with an orthotropic deck (Fig. 13). Comparison of the proposed solutions
showed that the second of them is more rational, which is distinguished not only by
its high manufacturability and process-ability for installation, but also by the accelerated rates of work with minimal labor costs. In this case, it is very important that all
structural members of the steel girder superstructure with the orthotropic deck can
be pre-fabricated in the factory. The only drawback of the second variant of the new
superstructure is its somewhat higher cost compared to the first variant. However,
according to the authors, all the existing advantages of the second design solution
practically eliminate this drawback, especially if we take into account the usual strict
requirements for terms of eliminating the consequences of terrorist attacks.
4 Conclusions
Probable variants of terrorist attacks on the Paton Bridge across the Dnieper River
are considered, the methods for eliminating their consequences are developed and
four most likely schemes for destruction of bridge structures are established. Within
the framework of these methods, three variants are proposed for replacing damaged
sections of spans. Taking into account considerations regarding the accelerated rates
of work with minimal labor costs, high manufacturability and installation processability of structures, preference is given to metal structures. A lightweight steel
superstructure with a carriageway in form of steel orthotropic deck and with two
O. Shymanovskyi et al.
Fig. 12 Schematic structural diagrams of the most likely destruction and reconstruction of the road
part of the Darnytsky rail-road bridge: a superstructure after destruction of span 3–4; b superstructure
after reconstruction
Two design solutions of a new single-span structure are considered, the first of
which is a steel–concrete superstructure and the second one is a steel girder superstructure with an orthotropic deck (Fig. 13). Comparison of the proposed solutions
showed that the second of them is more rational, which is distinguished not only by
its high manufacturability and process-ability for installation, but also by the accelerated rates of work with minimal labor costs. In this case, it is very important that all
structural members of the steel girder superstructure with the orthotropic deck can
be pre-fabricated in the factory. The only drawback of the second variant of the new
superstructure is its somewhat higher cost compared to the first variant. However,
according to the authors, all the existing advantages of the second design solution
practically eliminate this drawback, especially if we take into account the usual strict
requirements for terms of eliminating the consequences of terrorist attacks.
4 Conclusions
Probable variants of terrorist attacks on the Paton Bridge across the Dnieper River
are considered, the methods for eliminating their consequences are developed and
four most likely schemes for destruction of bridge structures are established. Within
the framework of these methods, three variants are proposed for replacing damaged
sections of spans. Taking into account considerations regarding the accelerated rates
of work with minimal labor costs, high manufacturability and installation processability of structures, preference is given to metal structures. A lightweight steel
superstructure with a carriageway in form of steel orthotropic deck and with two