PROBLEMS CONCERNING SCIENTIFIC AND TECHNICAL SUPPORT OF MAJOR REPAIRS OF BRIDGE STRUCTURES
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2018, Vol 81, Issue
Abstract
Problem. The process of designing major repair or reconstruction of bridge structures involves considering modern loads, structural solutions and materials that provide a sufficiently high level of long-term operation. In this regard, complex problems of taking into account the new safety requirements for the operation of old bridge structures occur due to a wide variety of structural forms and modern loads. A large number of bridge structures are in the fourth operational condition (limited operating capacity) and they need major repairs, but due to the under-funding of the road sector only bridges that are in preemergency or emergency conditions are being repaired these days. All too often the funding is sufficient only for developing a design solution that calls for the integration of old bridges and the new requirements of State Construction Regulations. According to the above considerations, there is the need to obtain the scientific solution to a number of problematic issues faced in the course of major re-pairs of bridge structures with a long service life. Old constructions with complex technical sys-tems in many cases require the solution of technical issues only after disassembling the structural ele-ments or dismantling the structures with the detec-tion of hidden defects. Goal. The main factor is the solution to the problem of ensuring safe operation and extending the service life of bridge structures by performing their major repairs along with imple-menting certain technological and technical solu-tions that are not provided for in requirements doc-uments and the project design. Methodology. In the process of major repairs of bridge structures the problematic issues occur, so there is a need for sci-entific and technical support. The program of scien-tific and technical support, which provides tech-nical and technological solutions that arise when performing repair works has to be developed and agreed with the project owner in advance. Results. When repairing the overpass under consideration, substantial attention has been paid to the construc-tion of the solid reinforced concrete slab over the entire area of the structure, which makes it possible to increase both its bearing capacity and the dura-bility. At the same time, the problem of joint opera-tion of the slab and reinforced concrete beams has been solved. Originality. Particular attention is paid to the issues of constructing drainage, water dispos-al and waterproofing since these works guarantee the designed life of bearing constructions and the stability of properties of concrete and reinforcement over time. Therefore, during the course of these works special attention is paid to technology com-pliance, the quality of materials and the sequence of repair operations. Practical value. The proposed technical and technological solutions have made it possible to improve the quality of repair works and prolong the service life of the structure in the pro-cess of scientific and technical support of major repairs of the bridge structure.
Authors and Affiliations
V. Kozhushko, A. Bilchenko, E. Sinkovskyi
Keywords
Related Articles
- EP ID EP426112
- DOI -
- Views 57
- Downloads 0
ОСНОВНІ ЗАСАДИ ВИКОРИСТАННЯ КРИТЕРІЇВ РИЗИКУ ДО ОЦІНЮВАННЯ БЕЗПЕКИ ФУНКЦІОНУВАННЯ АДС
Система автомобіль–дорога–середовище (АДС) є складним техногенним об’єктом. У статті подано математичну модель визначення основних показників ризику аварій. Було встановлено, що запропонована модель дозволяє одержати кіл...
ENERGY EFFICACY OF HYDRAULIC TRANSPORT PLANTS
On the basis of power efficiency indexes of hydraulic transport such as specific power consumption per ton of displaced material and specific power consumption per ton and meter of displacement there was carried out syst...
DYNAMIC AND ECONOMETRIC MODELS FOR PREDICTING THE AUTOMOBILE ROADS CONDITION
Essential components of the system of pavement condition management (PMS) of highways are the assessment of the current state of both individual sections and the network as a whole and the prediction of quantitative char...
DIAGNOSTICS OF VASCULAR DISORDERS FOR DRIVERS OF PASSENGER MOTOR TRANSPORT
The results of inspection of drivers of motor transport are presented. Data concerning of functional diagnostics of vascular violations is compared in the groups of drivers of fixed route busses and the personnel of the...
SPEECH ACTIVITY AS A PURPOSE AND MEANS OF TEACHING A FOREIGN LANGUAGE
The article aims at highlighting the logical construction as a main feature of a foreign language lesson. Three compulsory aspects are shown to create the logic of a foreign language lesson. The importance of the active...