scholarly journals Influence of natural and climatic factors on the organization of construction

2020 ◽  
Vol 164 ◽  
pp. 08006
Author(s):  
Marat Kuzhin ◽  
Ekaterina Chepik ◽  
Angelina Baranova
Keyword(s):  
Climatic Factors ◽  
Climatic Conditions ◽  
Technical Documentation ◽  
Construction Work ◽  
Natural Conditions ◽  
Factors Affecting ◽  
The Cost ◽  
Monolithic Structures ◽  
Cost Of Construction

In this research the influence of natural and climatic conditions on the organization of construction production are examined. Our purpose was to identify the nature of the dependence of the duration of construction work on natural and climatic factors. The analysis of normative and technical documentation in terms of accounting for the influence of natural and climatic factors was made. The system of estimation of influence of natural conditions on preparatory, ground, facade, roofing works, and also the appliance of monolithic structures, installation of prefabricated ferroconcrete items, and on works – implementation of internal finishing is offered. It was estimated, that the norms of construction production take into account a certain number of natural and climatic factors affecting the performance of work, but most of these factors have not yet been given in the normative and technical documentation. It is necessary to study this issue more comprehensively and to establish exact dependences on natural and climatic conditions, which will allow to quantify these factors already while calculating. This is necessary to compile more accurate calendar plans and schedules of production of works, as close as possible to real conditions. The study of this issue is one of the most important issues in the design of construction production. With insufficient consideration of these factors, the final actual figures are very different from the projected ones, which also lead to an increase in the cost of construction and installation work and the duration of their implementation. Taking into consideration the influence of natural and climatic factors will allow planning construction production more accurate.

Impact of climatic conditions on the parameters of failure flow of military vehicles

2021 ◽  
pp. 095440702110202
Author(s):  
Nikolaj Dobrzinskij ◽  
Algimantas Fedaravicius ◽  
Kestutis Pilkauskas ◽  
Egidijus Slizys
Keyword(s):  
Climatic Factors ◽  
Armed Forces ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Technical Equipment ◽  
Factors Affecting ◽  
Military Vehicles ◽  
Equipment Reliability ◽  
Number Of Factors ◽  
The Impact

Relevance of the article is based on participation of armed forces in various operations and exercises, where reliability of machinery is one of the most important factors. Transportation of soldiers as well as completion of variety of tasks is ensured by properly functioning technical equipment. Reliability of military vehicles – armoured SISU E13TP Finnish built and HMMWV M1025 USA built were selected as the object of the article. Impact of climatic conditions on reliability of the vehicles exploited in southwestern part of the Atlantic continental forest area is researched by a case study of the vehicles exploitation under conditions of the climate of Lithuania. Reliability of military vehicles depends on a number of factors such as properties of the vehicles and external conditions of their operation. Their systems and mechanisms are influenced by a number of factors that cause different failures. Climatic conditions represent one of the factors of operating load which is directly dependent on the climate zone. Therefore, assessment of the reliability is started with the analysis of climatic factors affecting operating conditions of the vehicles. Relationship between the impact of climatic factors and failure flow of the vehicles is presented and discussed.

scholarly journals Quality consideration of building and renovation works while forensic structural inspections to determine the volume and cost of construction

2021 ◽  
Vol 23 (1) ◽  
pp. 236-245
Author(s):  
T. Dudnyk ◽  
L. Chintea
Keyword(s):  
Building Codes ◽  
Construction Work ◽  
Field Surveys ◽  
Quality Of Work ◽  
Physical Volume ◽  
The Cost ◽  
Cost Of Construction ◽  
Construction Works

Currently, forensic methods and regulations in the field of construction do not explain how quality of work affects the procedure of forensic examinations and research related to determining the work scope. While carrying out building and renovation services, it is possible to control provided construction and renovation services,  establish their physical volume and quality. While research, forensic expert can identify violations of building codes, as well as determine the cost of refurbishment or elimination of defects made providing services. The scoop of performed works is determined by geometric parameters of construction elements, established during field surveys using design and as-built documentation. While carrying out field surveys, it is necessary (along with the determination of service scope) to pay attention to the compliance of the work performed with the requirements of building codes. The article outlines problematic issues and provides a list of basic indicators determining the scoop and quality of the construction works carried out, indicated in the reporting documentation drawn up by contractors based on results of activities in the field of construction. Actual issue arising in the establishment of the scoop and cost of construction work is considered  that quality does not meet the requirements of regulatory documents in the field of construction. It is explained how the quality of the work performed affects the results of research related to the determination of the actually completed volumes of repair, building and renovation and construction work.

scholarly journals Factors Affecting the Cost of Construction Materials in Egypt

2018 ◽  
Vol 22 (1) ◽  
pp. 82-89
Author(s):  
Mohamed Abdel-Wahab ◽  
Ahmed Ibrahim ◽  
Hassan Ghatass ◽  
Emad Abdel-Galil
Keyword(s):  
Construction Materials ◽  
Factors Affecting ◽  
The Cost ◽  
Cost Of Construction

scholarly journals Global potential distribution prediction of Xanthium italicum based on Maxent model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yang Zhang ◽  
Jieshi Tang ◽  
Gang Ren ◽  
Kaixin Zhao ◽  
Xianfang Wang
Keyword(s):  
Potential Distribution ◽  
Invasive Plant ◽  
Climatic Conditions ◽  
Total Contribution ◽  
Factors Affecting ◽  
Maxent Model ◽  
Average Annual Temperature ◽  
Alien Invasive Plants ◽  
The Cost ◽  
And Control

AbstractAlien invasive plants pose a threat to global biodiversity and the cost of control continues to rise. Early detection and prediction of potential risk areas are essential to minimize ecological and socio-economic costs. In this study, the Maxent model was used to predict current and future climatic conditions to estimate the potential global distribution of the invasive plant Xanthium italicum. The model consists of 366 occurrence records (10 repeats, 75% for calibration and 25% for verification) and 10 climate prediction variables. According to the model forecast, the distribution of X. italicum was expected to shrink in future climate scenarios with human intervention, which may be mainly caused by the rise in global average annual temperature. The ROC curve showed that the AUC values of the training set and the test set are 0.965 and 0.906, respectively, indicating that the prediction result of this model was excellent. The contribution rates of annual mean temperature, monthly mean diurnal temperature range, standard deviation of temperature seasonal change and annual average precipitation to the geographical distribution of X. italicum were 65.3%, 11.2%, 9.0%, and 7.7%, respectively, and the total contribution rate was 93.2%. These four variables are the dominant environmental factors affecting the potential distribution of X. italicum, and the influence of temperature is greater than that of precipitation. Through our study on the potential distribution prediction of X. italicum under the future climatic conditions, it has contribution for all countries to strengthen its monitoring, prevention and control, including early warning.

scholarly journals FEATURES OF SEED GERMINATION AND EMBRYO DEVELOPMENT OF REPRESENTATIVES OF THE FAMILY RANUNCULACEAE

Ekosistemy ◽  
2021 ◽  
pp. 100-110
Author(s):  
A. A. Erst
Keyword(s):  
Seed Germination ◽  
Embryo Development ◽  
Climatic Conditions ◽  
Key Factors ◽  
Natural Conditions ◽  
Factors Affecting ◽  
Morphophysiological Dormancy ◽  
The Family ◽  
Long Time ◽  
Growing Conditions

The ability of seeds to maintain viability for a long time without germination is one of the most important adaptive properties of plants. The article analyzes the dormancy types of seeds of the Ranunculacea family and describes the key factors affecting seed germination and embryo development (warm and cold stratification, exposure to gibberellic acid) under artificially created conditions. It is noted that five levels of seed morphophysiological dormancy are described for the representatives of this family: non-deep simple, deep simple, deep simple epicotyl, intermediate complex and deep complex, which are mainly associated with adaptation to survival in difficult climatic conditions. In the review, various types of dormancy are considered in terms of their adaptive significance for representatives of the Ranunculacea family. To overcome each type of dormancy, a set of optimal conditions is necessary, which correlates with the growing conditions of species or individual populations in natural conditions. Therefore, the development of techniques for overcoming the seeds dormancy under artificial conditions is closely related with the study of the ecology of a particular species and the natural conditions of growth. The analysis of literature data revealed a significant problem: 40 % of the analyzed sources did not indicate the type of dormancy of seeds of the representatives of the Ranunculaceae family and, probably, the list of morphophysiological dormancy levels will be supplemented in the course of further studies.

scholarly journals Application of geosynthetic materials for road structures

2019 ◽  
Vol 265 ◽  
pp. 01013
Author(s):  
Elvir Akhmetshin ◽  
Kseniya Kovalenko
Keyword(s):  
Unit Cost ◽  
Road Construction ◽  
Coastal Zones ◽  
Technical Documentation ◽  
Calculation Methods ◽  
Road Surfaces ◽  
Environmentally Safe ◽  
Useful Life ◽  
The Cost ◽  
Cost Of Construction

In this article, the authors examines the application of geomaterials in road constructions, it economic indicators, the dependence of surface density and unit cost, as well as strength and unit cost, are analyzed. The economic and technical advantages of using woven geomaterials are shown. Geosynthetic materials allow increasing the strength of road structures and reducing the cost of construction while maintaining strength and reliability. Geogrid road has all the permits and technical documentation: the calculation methods are developed for the solution of road construction. Woven geomaterials are the best to use and have a number of advantages, but now nonwoven geomaterials are usually used in Russia, which is caused by imperfect design methods that do not take into account the strength of the geomaterial and reduce the density of pavement when using thick geomaterials. Geomaterials are geosynthetic products for strengthening slopes, slopes, coastal zones, road surfaces and other territories that need strengthening of soils. Geomaterials, among other things, are an excellent protection against erosion, environmentally safe, reliable, have a long useful life and are easily installed. Depending on the needs and type of territory, geogrids, geomatics and road geosets are used.

scholarly journals Unification in the design of four-span continuous bridges

2021 ◽  
Vol 18 (3) ◽  
pp. 120-126
Author(s):  
A. V. Makarov ◽  
◽  
S. A. Kalinovsky ◽  
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Concrete Bridge ◽  
Construction Work ◽  
Load Bearing Capacity ◽  
Reinforced Concrete Bridge ◽  
Bridge Span ◽  
The Cost ◽  
Cost Of Construction ◽  
Continuous Metal

The article deals with the creation of continuous metal and monolithic reinforced concrete bridge span structures, which are the most efficient. Efficiency is achieved by searching for opportunities to unify structures with the most successful options for providing them with the required load-bearing capacity with the lowest cost of building materials. If a certain coefficient of the length of the extreme relative to the average is introduced, there can be achieved the equality of the transverse moments of spans. Such performance of the structure will allow building the bridge span as if combined from three types of unified blocks, which would reduce the labor complexity and the cost of construction work.

Influence of climatic factors on the properties of ballistically resistant organoplastics

2021 ◽  
pp. 144-157
Author(s):  
G. F. Zhelezina ◽  
N. A. Solovieva ◽  
P. M. Shuldeshova ◽  
A. Ch. Kan
Keyword(s):  
Environmental Factors ◽  
Climatic Factors ◽  
Climatic Conditions ◽  
Fuel Oil ◽  
Adhesively Bonded ◽  
Aramid Fabric ◽  
Monolithic Structures

Ballistic-resistant organoplastics made from layers of aramid fabric, adhesively bonded by a binder film, exhibit an increased tendency to absorb moisture, water and technical fluids in comparison with organoplastics monolithic structures. The absorption of liquids is anisotropic and manifests itself most intensively through the butt ends of the samples. The use of protective paintwork ensures stability of the characteristics of ballistic-resistant materials when exposed to environmental factors (environment, water, fuel, oil, natural climatic conditions). 

scholarly journals Assessment of thermal and energy performance of masonry blocks prepared with date palm ash

2020 ◽  
Vol 9 (3) ◽  
Author(s):  
Noman Ashraf ◽  
Muhammad Nasir ◽  
Walid Al-Kutti ◽  
Faris A. Al-Maziad
Keyword(s):  
Date Palm ◽  
Agricultural Waste ◽  
Arabian Gulf ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
Climatic Conditions ◽  
The Novel ◽  
Sustainable Products ◽  
The Cost ◽  
Cost Of Construction

Abstract This article evaluates the thermal and energy performance of mortar blocks containing local agricultural waste. The mortar blocks were cast by the replacement of ordinary Portland cement (OPC) with varying amounts of date palm ash (DPA) in the range of 10–30%. Experiments and simulations were carried out to assess the thermal characteristics and energy performance of the specimens. A prototype office building was modeled and simulated in DesignBuilder (Version 6.1.06) with modified blocks prepared with DPA under the Arabian Gulf environment characterized by hot and humid climatic conditions of Dhahran, Saudi Arabia. The developed blocks are characterized as lightweight blocks based on density data which satisfy the requirement of ASTM C55-11. The analysis and simulation indicate that the incorporation of DPA improves the thermal resistance of up to 47%, enhances the indoor environment and yields annual energy consumption of up to 7.6%, consequently reduces the cost of masonry block production by ~ 11% without compromising the physical, chemical, and mechanical properties. The masonry blocks prepared with DPA found to be economical than conventional masonry blocks. It is postulated that the novel DPA-based developed blocks are significantly sustainable products which will contribute to the valorization of DPA waste along with the reduction in the cost of construction and operational cost of the building.

ABOUT NECESSITY OF MATHEMATICAL MODELING OF THE BUSINESS PROCESS OF COST ESTIMATE CALCULATIONS IN THE CONSTRUCTION OF OIL AND GAS FACILITIES

2017 ◽  
pp. 139-145
Author(s):  
R. I. Hamidullin ◽  
L. B. Senkevich
Keyword(s):  
Mathematical Modeling ◽  
Quality Assessment ◽  
Business Process ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Construction Organizations ◽  
The Cost ◽  
Cost Of Construction

A study of the quality of the development of estimate documentation on the cost of construction at all stages of the implementation of large projects in the oil and gas industry is conducted. The main problems that arise in construction organizations are indicated. The analysis of the choice of the perfect methodology of mathematical modeling of the investigated business process for improving the activity of budget calculations, conducting quality assessment of estimates and criteria for automation of design estimates is performed.

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