scholarly journals A Proposed Clamp System for Mechanical Connection of Reinforcing Steel Bars

2017 ◽  
Author(s):  
Parmo
Keyword(s):  
Earthquake Hazard ◽  
Maximum Load ◽  
Tensile Tests ◽  
Reinforcing Steel ◽  
City Development ◽  
High Rise ◽  
Steel Bars ◽  
Seismic Resistant ◽  
The City

The city development in Indonesia is more oriented to the overground space and this is because the urban population has increased significantly and it is incomparable with the land available in the cities. The number of high-rise buildings and skyscrapers also marks this phenomenon. However, high-rise buildings and skyscrapers have the potential to be vulnerable to the earthquake hazard in Indonesia particularly those located at the high risk seismic regions. In the design of seismic resistant buildings, there are two important aspects required to be considered, namely strength and ductility. The deformation capability and better innovative reinforcement connection become primary consideration in the design of seismic resistant structures. From the tensile tests of reinforcing steel bars with clamps, it is shown that D13 bars has the yield and ultimate tensile strengths of 270.69 and 351.45 MPa, respectively, with the maximum load of 4,757 kg and the maximum elongation of 40%. As for the D16 bars, the yield and ultimate tensile strengths of 217.80 and 327 605 MPa, respectively, with the maximum load of 6,717 kg and the elongation of 32%. In the study, two pieces of steel clamps were tested, it is found that to obtain better results there is a need to increase the number and improve the quality of material of the steel clamps.

scholarly journals Experimental Investigation into Corrosion Effect on Mechanical Properties of High Strength Steel Bars under Dynamic Loadings

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Hui Chen ◽  
Jinjin Zhang ◽  
Jin Yang ◽  
Feilong Ye
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Dynamic Loading ◽  
High Strength Steel ◽  
High Strength ◽  
Tensile Tests ◽  
Reinforcing Steel ◽  
Test Results ◽  
Cross Sectional ◽  
Steel Bars

The tensile behaviors of corroded steel bars are important in the capacity evaluation of corroded reinforced concrete structures. The present paper studies the mechanical behavior of the corroded high strength reinforcing steel bars under static and dynamic loading. High strength reinforcing steel bars were corroded by using accelerated corrosion methods and the tensile tests were carried out under different strain rates. The results showed that the mechanical properties of corroded high strength steel bars were strain rate dependent, and the strain rate effect decreased with the increase of corrosion degree. The decreased nominal yield and ultimate strengths were mainly caused by the reduction of cross-sectional areas, and the decreased ultimate deformation and the shortened yield plateau resulted from the intensified stress concentration at the nonuniform reduction. Based on the test results, reduction factors were proposed to relate the tensile behaviors with the corrosion degree and strain rate for corroded bars. A modified Johnson-Cook strength model of corroded high strength steel bars under dynamic loading was proposed by taking into account the influence of corrosion degree. Comparison between the model and test results showed that proposed model properly describes the dynamic response of the corroded high strength rebars.

scholarly journals High-rise construction in the Saint Petersburg agglomeration in 1703–1950s

2018 ◽  
Vol 33 ◽  
pp. 01008 ◽  
Author(s):  
Sergey Sementsov ◽  
Nadezhda Akulova ◽  
Severina Kurakina
Keyword(s):  
Visual Perception ◽  
Urban Planning ◽  
Spatial Perception ◽  
Altitude Range ◽  
City Development ◽  
Saint Petersburg ◽  
High Rise ◽  
Spatial System ◽  
The 1950S ◽  
The City

Regularities of high-rise construction (implemented projects and developments) in Saint Petersburg and the Saint Petersburg agglomeration since the foundation of the city in 1703 till the 1950s are considered. Based on these regularities, a single spatially developed system of vertical dominants is formed. High-rise construction in the city and its suburbs started in the 1710s and continues up to the present time. In the considered decades (1703–1950s), high-rise construction mostly performed urban-planning functions (with vertical and symbolic dominants), relying on patterns of the visual perception of man-made landscapes under development. Since the 1710s, the construction of vertical dominants (mainly temples, spires of towers, lighthouses, etc.) of five ranks (depending on the altitude range and in relation to the background development) was conducted in territories of the entire agglomeration. These dominants were arranged in landscapes of the city and suburbs with almost mathematically precise accuracy and according to special regulations. Such dominants obtained particular descriptive and silhouette characteristics in accordance with the conditions of spatial perception. In some periods of city development, attempts were made to create monuments (symbolic dominants) of specific height and include those in the spatial system of high-rise dominants as significant elements of the city silhouette.

scholarly journals Formation and maintenance of the territorial balance in the conditions of high-rise construction in the city

2018 ◽  
Vol 33 ◽  
pp. 01034
Author(s):  
Tatiana Kisel
Keyword(s):  
Urban Development ◽  
Urban Environment ◽  
Social Infrastructure ◽  
City Development ◽  
High Rise ◽  
The City

High-rise construction results in the need of planning of infrastructure facilities, taking into account the increase in loading, as high-rise construction allows to place considerably bigger number of residents in the limited territory. For this purpose it is necessary to estimate the required and actual level of providing the population with each particular type of the facilities of social infrastructure. The compliance of required and actual level of providing can be characterized as the territorial balance, while the discrepancy acts as the territorial imbalance. The article is devoted to the development of such instruments of planning of urban development, which will allow to create the qualitative urban environment, founded on the territorial balances. Namely, it is devoted to the calculation of level of providing the population with the facilities of social infrastructure, to the determination of level of the imbalance in absolute and relative units and also to the ranging of imbalances on urgency of their elimination. The size of the imbalance is of great importance for planning and realization of managerial influences from the executive authorities, operating the city development. In order to determine the urgency of realization of actions for the construction of facilities of social infrastructure it is offered to range the imbalances according to their size, having determined the deviation size from balance, which is so insignificant that it does not demand any managerial influences (it can be characterized as balance) and also the groups of the imbalances, differing in urgency of managerial influences, directed to the decrease and elimination of the revealed imbalance.

scholarly journals Nodes and Networks: The Generative Role of Cultural Heritage for Urban Revival in Kikinda

2019 ◽  
Vol 11 (9) ◽  
pp. 2509 ◽  
Author(s):  
Uroš Radosavljević ◽  
Aleksandra Đorđević ◽  
Kseniјa Lalović ◽  
Jelena Živković ◽  
Zoran Đukanović
Keyword(s):  
Social Sustainability ◽  
City Development ◽  
Case Study Method ◽  
Cultural Artifact ◽  
Urban Heritage ◽  
Heritage Buildings ◽  
The City

Using heritage as a cultural artifact in city development is not new, but little has been explored about how urban heritage can be utilized as new generative value and a new planning instrument for the revival of cities. The purpose of this paper is to show the creative and the generative use of urban heritage, both for the extension of cultural and tourist offer of the city and for the improvement of the quality of life in physical, social and economic terms for the community. The case study method was used for the adaptive reuse of projects for heritage buildings and urban revival in Kikinda. We argue that urban heritage has to be used, bearing in mind its spatial, economic and social sustainability aspects, and become a generator of urban revival. We go beyond recognition of the value of heritage as a cultural artifact that should solely be preserved and used as a static element in urban development, and view it more as a dynamic asset for city revival processes. We found that for the heritage nodes to be utilized as the new generative value for the revival of cities, they have to be perceived from the network perspective, thus influencing the urban environment in a sustainable way.

scholarly journals LIFESTYLE, ARCHITECTURE AND QUALITY OF THE URBAN ENVIRONMENT

2021 ◽  
Vol 11 (1) ◽  
pp. 160-168
Author(s):  
Viktor P. GENERALOV ◽  
Elena M. GENERALOVA
Keyword(s):  
Urban Environment ◽  
Residential Buildings ◽  
Living Environment ◽  
Compact City ◽  
High Rise ◽  
Fundamental Research ◽  
Typological Structure ◽  
The Relationship ◽  
The City

The study reveals the aspects that defi ne the concept of “lifestyle”, including the main categories: standard of living, lifestyle, quality of life and lifestyle. Insuffi cient knowledge of the mutual infl uence of people’s “lifestyle” on the typological structure of apartments and residential buildings, on the quality of the urban environment is emphasized. The infl uence of the level of urbanization of the city territory on the characteristics of the “urban lifestyle” is considered. Problematic issues are raised related to the debate on the relationship between building density and comfort and the quality index of the living environment. The main directions of fundamental research in the fi eld of architecture, aimed at the development of new types of buildings, are touched upon. The emphasis is made on the methods of using high-rise buildings for the humanization of the urban environment and the formation of a modern “compact city”.

scholarly journals Smart Concept expansion from local to city scale

2018 ◽  
Vol 245 ◽  
pp. 16002 ◽  
Author(s):  
Anatolijs Borodinecs ◽  
Aleksandrs Korjakins ◽  
Aleksandrs Zajacs ◽  
Anna Iufereva
Keyword(s):  
Energy Efficient ◽  
Carbon Emission ◽  
Smart Cities ◽  
City Development ◽  
Sustainable City ◽  
Rapid Urbanization ◽  
Residential Sector ◽  
Environment Quality ◽  
The City

Rapid urbanization leads to the cities expansion in both dimensions: horizontal and vertical. Thus causing significant increase of energy consumption and reduction of environment quality. Nowadays European Initiative on Smart Cities development becomes a very popular across the globe. The aim of this initiative is to insure sustainable city development taking into consideration quality of life and reduction of carbon emissions. Residential sector is one of biggest energy consumers and carbon emission production in Latvia. Also, city transport is a crucial carbon emission producers. In scope of this study the city development potential is analyzed. The increase of energy efficient scale is taking into consideration.

scholarly journals Essential Mechanical Properties of Structural Steels for Steel Reinforced Buildings in the Earthquake Sensitive Areas

2011 ◽  
Vol 4 (1) ◽  
pp. 51 ◽  
Author(s):  
M. A. Islam
Keyword(s):  
Mechanical Properties ◽  
Structural Steel ◽  
Fatigue Loading ◽  
Structural Steels ◽  
Reinforcing Steel ◽  
High Rise ◽  
Steel Bar ◽  
Steel Bars ◽  
Cyclic Type ◽  
Earthquake Effects

During earthquake, the ground along with its various natural and manmade structures experiences shaking of various intensities and frequencies depending on the nature of the earthquake. The loading activities caused by earthquakes on various structures are very much cyclic type, which is popularly known as fatigue loading. On the other hand, for modern high-rise buildings a large volume of steel bar is used to reinforce the concrete because of the pioneer role of steel bars embedded inside the concrete for safety of the buildings. In this study various mechanical properties of reinforcing steel bars that are essential to counter balance the earthquake effects have been identified first. At the same time these essential mechanical properties have been defined and studied for most commonly used reinforcing steel bars. For doing this, both the conventional and advanced structural steels were selected. The mechanical properties and fatigue behaviours of these steels have been presented and discussed in this paper.  Keywords: Earthquake; High-rise buildings; Reinforcing steel bars; Conventional structural steel; Advanced structural steel.© 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v4i1.7069 J. Sci. Res. 4 (1), 51-63 (2012)

The Design of High-Rise Building Based on City Space Planning

2014 ◽  
Vol 584-586 ◽  
pp. 156-159
Author(s):  
Fang Fang Yang
Keyword(s):  
Building Design ◽  
Space Environment ◽  
City Development ◽  
Space Planning ◽  
High Rise ◽  
High Rise Building ◽  
City Space ◽  
City Construction ◽  
Design Ideas ◽  
The City

With the accelerating pace of city construction, high-rise buildings are gradually in the process of city development plays a more and more important role. In this paper, design of a high-rise building are analyzed, and puts forward the high-rise building design should be based on city space planning, as far as possible to reduce the interference to the city space environment. The design ideas of coordination, integration, humanity are also proposed, so as to enhance the image of high-rise buildings and the city's environmental quality.

scholarly journals Space-planning development of high-rise dominating structures in the historical center (case study of St. Petersburg)

2020 ◽  
Vol 164 ◽  
pp. 04002
Author(s):  
Milena Zolotareva
Keyword(s):  
Spatial Structure ◽  
Urban Environment ◽  
20Th Century ◽  
City Development ◽  
Field Methods ◽  
Height Range ◽  
Study Objective ◽  
Space Planning ◽  
High Rise ◽  
The City

The article addresses the evolution of layout and spatial design development regarding high-rise zoning in the central part of St. Petersburg. The skyline has always played an important role in the spatial composition of St. Petersburg. Study objective of the study is to analyze the evolution of the spatial and spatial structure and high-altitude zoning in the historical part of St. Petersburg in the end of the 19th – beginning of the 20th century. A study of the sustainable development of the historical urban environment is of undoubted interest from the point of view of identifying promising approaches to the implementation of planning, architectural and construction measures for for modern construction in the historical city. The study is based on cartographic, literary end field methods. St. Petersburg is a unity of space-planning structures that were shaped during the 18th–19th centuries. Moreover, every subsequent urban-planning concept of city development acted both to develop the city and to connect the concepts to each other. Therefore, regularities in the development of the system of high-rise dominating structures in St. Petersburg shall be analyzed with account for the historical stages of the layout shaping of its urban environment. Analysis of examples of new construction at the beginning of the 19th – beginning of the 20th century in the center of St. Petersburg allows you to capture a change in the urban landscape. The practice of active transformation of the city center was accompanied by changes with regard to the height range and scale, and, sometimes, replacement of the existing spatial structure and high-rise zoning.

scholarly journals UOSTAMIESČIO VIZUALINIO ĮVAIZDŽIO PLĖTROS GALIMYBĖS IR PROBLEMOS: AUKŠTYBINIŲ PASTATŲ IŠDĖSTYMO SPECIALIOJO PLANO RENGIMAS – SPRENDINIŲ KONKRETIZAVIMAS IR PASEKMIŲ VERTINIMAS/ POSSIBILITIES AND PROBLEMS IN THE FORMATION OF SEAPORT VISUAL IMAGE: SPECIAL PLAN OF HIGH-RISE BUILDINGS FOR KLAIPĖDA – CURRENT SITUATION AND CONCEPTION

2008 ◽  
Vol 32 (2) ◽  
pp. 71-85 ◽  
Author(s):  
Inesa Alistratovaitė
Keyword(s):  
Visual Image ◽  
Current Situation ◽  
Point Of View ◽  
City Development ◽  
High Rise ◽  
High Rise Building ◽  
City Structure ◽  
Definition Of ◽  
Two Stages ◽  
The City

The paper deals with issues of high-rise building development and contemporary problems related to the formation of city development vision in Lithuania. The analysis focuses on the possibilities and problems arising in the process of developing the Special Plan of high-rise building arrangement in Klaipėda in the formation of the visual image of the city. The methodology of this Plan is discussed by the author in two papers. The present paper is the first one and analyses two stages of the plan development. The first stage is the analysis of the current situation in Klaipėda and possibilities to introduce high-rise buildings into the city morphostructure. This stage comprises 7 aspects: evaluation of the territory development from the point of view of investment possibilities; historical development of the city structure; hierarchy of values of preserved territories; analysis of the territory planning documents regulating townscape formation; evaluation of visual peculiarities; definition of visual identity zones, analysis and evaluation of important mass view points as well as evolvents of views seen from them. The second stage of developing the Special Plan constitutes efforts to define the conception of high-rise buildings arrangement on a city scale, central part scale and old-town scale. Santrauka Straipsnis skirtas aukštybinės statybos plėtros klausimui ir su tuo susijusioms šiandieninėms miesto plėtros vizijos formavimo problemoms Lietuvoje. Nagrinėjamos Klaipėdos miesto vizualinio įvaizdžio plėtros galimybės ir problemos rengiant Klaipėdos miesto aukštybinių pastatų išdėstymo specialųjį planą (SP). Šio plano metodikai aptarti autorė numatė parengti du straipsnius. Šiame, pirmajame, liečiamos dvi plano rengimo stadijos. Pirmoji – tai esama Klaipėdos miesto būklė, galimybės miesto morfostruktūroje rastis aukštybiniams pastatams; jos aptarimas apima 7 aspektus – miesto teritorijos pagal investicines plėtros galimybes vertinimą; miesto struktūros istorinę raidą; saugomų teritorijų vertybinę hierarchiją; dokumentų sprendinių, turinčių įtakos miestovaizdžių formavimui, analizę; vizualinių ypatumų vertinimą; miesto vizualinio identiteto zonų nustatymą ir svarbiausių masinės apžvalgos taškų bei iš jų matomo vaizdo išklotinių tyrimą ir nustatymą. Antroji plano rengimo stadija – tai aukštybinių pastatų išdėstymo koncepcijos paieškos miesto mastu, centrinės dalies mastu ir senamiesčio mastu.

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