In this paper a new approach to the consistent identification of the deformation pattern vital for the precise determination of the plastic limit load of a cylindrical shell from MNA when using modified Southwell (MS) and Tangent Stiffness (TS) plots is presented. It is proposed that the formalised assessment of the plastic collapse load can be done by the application of the relation between the load factor increment ΔrR and the arc length s – for an identification of achievement of the complete plastic collapse mechanism from MNA, and then the MS or TS plot for the displacement pattern that corresponds to the identified plastic mechanism.
The aim of this work is to study and explore the causes of the landslide in different locations using Ground Penetrating Radar (GPR) technology. GPR uses the electromagnetic method related the high-frequency pulse that used widely in various field. The experimental study focused on the investigation of the landslide in the road by GPR method with antenna 200 MHz. The landslides become serious problems and required various technique and methods to investigate it in several places. GPR measurements present a useful technique for studies and investigation of the problem. The GPR can be categorized in the first place as an experimental method surveys landslide depths were recognized at 1-10 m below the natural terrain level. The results obtained revealed the causes of landslides on the road.
From ancient times, mankind needed organization and coordination to be able to carry out its projects. Thus, over time, as requirements grew larger, it naturally emerged the necessity, development and improvement, of the skills of manager, coordinator, of a project team.
The paper develops the integrated management concept and tries to apply it for quality system management in construction.
This paper uses the method of the synthesis of the studied documents to demonstrate the necessity to implement integrated management.
Disability can cover various areas of people’s activities, but it is primarily associated with difficulties that relate to independent movement. The possibility of free movement is one of the basic human rights. People with disabilities who cannot get to work and take employment, despite a desire to do so, assimilate with the rest of society to a worse extent, do not have the means to support themselves and do not earn national income. From this point of view, programs and activities aimed at maximising mobility and access to various types of places for people with disabilities, including those in public space, are very important. These types of places include paid parking zones in cities. Their location in city centres provides access to most offices. Due to the fact that they are located in public space, municipalities and city authorities have an impact on their management and on establishing the principles of their functioning. A very important element of this management is determining the rules for providing parking spaces in paid parking zones, particularly with regard to the amount of parking fees for disabled people. The article provides an analysis of the management of the provision of disabled parking spaces in relation to paid parking zones in all voivodeship cities in Poland.
The sliding strip of the current collector (pantograph) of a rail vehicle is an element directly cooperating with the catenary and is exposed to abrasion, electric discharge and various types of damage. It is therefore the most frequently replaced element. However, often sliding strips are exchanged before exceeding the limit thickness value, which increases the costs related to technical maintenance. Because the wear process is dependent on many factors, heuristic methods are necessary to predict the thickness of the sliding strip. Knowing the predicted thickness value, it will be possible to adapt the maintenance cycle. In the article, the results of simulations carried out based on the developed structure of the artificial neural network are also presented.
The entire Romanian Black Sea coastline is subject to erosion under the conditions of coastal dynamics changing. The problem the Romanian coastal area is facing is the accelerated number of conflicts between coastal development and coastal erosion. The purpose of this article is to present the projects realized and proposed for the protection and rehabilitation of the Romanian coastal area. The implementation of projects from non-reimbursable European funds to reduce erosion in the coastal area of the Romanian Black Sea coast aims to protect and improve the quality of the environment and the standard of living.
Hence economic growth requires more and more investments in the harbor area, especially nearby waterfront structures, a special attention must be taken into account regarding proper infrastructure design for structures with high vertical loads. At the same time, we have to consider the good behavior of the new design structures and also their impact on the existing nearby waterfront infrastructure. Being adjacent to waterfront structures and due to the limited available space, these structures are typically tall and narrow, and exert average soil pressures on the order of 300KPa. These loads can only be accommodated by ground with an adequate bearing capacity. This publication presents case studies of waterfront projects like grain silos storage facility. Available results for the certification and monitoring of the works are also presented, as well as other considerations based on the author’s experience.
The calculation of the friction factor involved in the Darcy-Weisbach equation has a key role in the accurate assessment of distributed head losses. For the turbulent flow regime, this friction factor was mathematically expressed in the form of the Colebrook-White (C-W) equation, widely accepted by engineers and scientists. Nevertheless, the C-W equation is an implicit one and must be solved using numerical methods. This is a major disadvantage for the average engineer, who always prefers an explicit equation which could be easily integrated into his familiar spreadsheet environment. The present paper is investigating some of the most used explicit alternatives to the C-W equation, with respect to several case scenarios taken from typical Building Services hydraulic calculations.
The paper focuses attention on the problem of increased risks during the loading and unloading of railway tankers. To evaluate the risk which may occur during loading dangerous goods into tanker trains, the loading processes have been divided into seven stages. Based on HIRA risk analysis, for each stage of improvements, Quick Kaizen tasks were proposed. Special attention was paid to possible improvements in technical means, tools and processes. Thanks to the proposed improvements, it is possible to increase safety, not only during the loading of dangerous goods, but also in cases of loading and transportation of standard cargoes.
This article is aimed at providing a rationale for the need to introduce a new type of educational institution in Ukraine today, namely educational centers in the areas with challenging topography. This article identifies specific features of construction, given the difficult geographic topography and architectural environment of the educational institutions, and lists conditions impacting the volume and planning of educational facility construction. It defines how urban planning of school centers influence the areas with difficult topography and establishes their location type. The authors analyzed architectural and construction solutions for school centers in areas with challenging landscape. They have also identified form-shaping types of buildings and established the best slope ratio for each of the types.