scholarly journals Rigid altitude building parameters and their determination during monitoring

2020 ◽  
pp. 55-65
Author(s):  
Алексей Николаевич Плотников ◽  
Михаил Юрьевич Иванов ◽  
Ольга Станиславовна Яковлева
Keyword(s):  
Automatic Monitoring ◽  
Wind Load ◽  
Point Of View ◽  
Vertical Line ◽  
Structural Systems ◽  
Entire System ◽  
Load Bearing ◽  
High Rise ◽  
Building Parameters

В статье рассматриваются вопросы, связанные с соотношением жесткостей горизонтальных и вертикальных элементов высотных зданий. Из учета принципов работы несущих систем таких зданий определены характерные точки перелома кривой упругой вертикальной линии. Проанализирована возможность применения керамзитобетона в перекрытиях с точки зрения влияния их жесткости на деформации всей системы. Для различных конструктивных систем выполнен расчет перемещений от ветровой статической нагрузки с учетом пульсационной составляющей ветровой нагрузки, а также сопоставление компьютерного и ручного расчета. Определены места расположения датчиков автоматического мониторинга. The article discusses issues related to the ratio of the stiffnesses of horizontal and vertical elements of high-rise buildings. Based on the principles of operation of the load-bearing systems of such buildings, the characteristic fracture points of the elastic vertical line curve are determined. The possibility of using expanded clay in floors is analyzed from the point of view of the influence of their rigidity on the deformation of the entire system. For various structural systems, displacements from the static wind load were calculated taking into account the pulsating component of the wind load, as well as a comparison of computer and manual calculations. The locations of automatic monitoring sensors are determined.

scholarly journals Reducing the Impact of Wind Load with Shape of High Rise Buildings

2020 ◽  
Author(s):  
Nasra Mohammed Nasser Al-Azri ◽  
Sachin Kuckian ◽  
Himanshu Gaur
Keyword(s):  
Architectural Design ◽  
Lateral Displacement ◽  
Tall Buildings ◽  
Wind Load ◽  
Point Of View ◽  
Stability Parameters ◽  
Load Effect ◽  
High Rise ◽  
The Impact ◽  
Stable Shape

Recent Years, Many high rise buildings are being constructed across the world due to the increase in population. From the design point of view, lateral load such as earthquake and wind load should be taken into consideration while designing process. Architectural design of buildings sometimes leads towards difficult and unusual shape that challenges structural designers. The objective of this study is to assess the building behavior when subjected to wind load. To achieve this objective, different shapes of building such as pentagonal, triangular and circular building are assessed for stability. Parameters such as storey drift and lateral displacement are considered in order to find most effective and stable shape. The computer program ETABS is used for analysis. As the height of the building increases, wind load effect becomes significant and should be considered for designing. This could also be achieved by selecting most stable shape and appropriate structural system for tall buildings.

scholarly journals ANALYSIS OF MAXIMUM DEFORMATION OF HIGH RISE BUILDINGS WITH OUTRIGGER SYSTEM AGAINST WIND LOAD

2020 ◽  
Vol 6 (2) ◽  
pp. 141-149
Author(s):  
Fadli Kurnia ◽  
Resti Nur Arini ◽  
Dwi Ariyani ◽  
Soni
Keyword(s):  
Tall Buildings ◽  
Wind Load ◽  
Wind Loads ◽  
Structural Systems ◽  
Maximum Deflection ◽  
Lateral Loads ◽  
Optimum Location ◽  
Maximum Deformation ◽  
High Rise ◽  
Story Drift

Outrigger structural systems are quite effective using the lateral loads on tall buildings, one of the main benefits of utilization outrigger is that it can reduce deformation and the danger of inter-story drift caused by lateral loads acting on the building. In this case, wind loads will be viewed as a lateral load because the wind load acting on tall buildings can also cause deformation of the building. The implementation of the outrigger system is viewed from different positions to see the deformation that occurs and the placement of the maximum location. The results of the analysis of wind loads reviewed on these buildings have proven that the use of outriggers in buildings can reduce displacement by 19.58%, and inter-storey drifts by 13.24%, which is applied in a position of ½ of the building height. The optimum location of the outrigger installation can also be determined by calculating the analysis of the maximum deflection that occurs on the 40th floor.

scholarly journals Monitoring system of high-rise buildings, determined from the nature of the curvature of the elastic line of vertical elements

2019 ◽  
pp. 3-3
Author(s):  
Aleksey N. Plotnikov ◽  
Mikhail Ju. Ivanov
Keyword(s):  
Design Theory ◽  
Computer Calculation ◽  
Vertical Axis ◽  
Longitudinal Axis ◽  
Wind Load ◽  
Elastic Line ◽  
Load Bearing ◽  
Building Height ◽  
High Rise ◽  
Entire Height

Introduction. Issues arising from the automatic monitoring of high-rise buildings are considered. One of such issues is the necessity of minimizing the number of sensors when taking the operational patterns of such load-bearing systems. The method of sensor placement in high-rise buildings is described. Materials and methods. Different structural systems of high-rise buildings have common dependencies of longitudinal axis deformation on rigidity of vertical and horizontal load-bearing elements. Calculation of deformations from static wind load, comparison of data obtained by manual and computer calculation, and also comparison of static wind load with the wind load pulsation component are performed. Results. From the analysis of the extrema of the deformation function of the building vertical axis with the horizontal plane of the floor structure preserved, the main typical monitoring points necessary to minimize the number of sensors in high-rise buildings were determined. Based on the typical breaking points, the required number of sensors located 1/4 of the building height away from each other and the range of measured values of deformations that occur during operation were determined. Conclusions. For automatic (constant) monitoring of high-rise buildings, it is advisable to use a complex integrated method of measuring deformations of vertical load-bearing structures, frequencies and amplitudes of oscillations, and rotation angles. According to the general design theory of high-rise buildings and computer calculation models, the most efficient placement of engineering structure monitoring sensors is when they are evenly covering the perimeter of each floor and the entire height of the building. Measurements should be carried out following the outlines of the floor structures on stories located 1/4 of the building height away from each other, as well as on the stiffening core to control the integrity of floor structures and their connection to the stiffness core.

Vibration suppression of wind turbine nacelle with active electromagnetic mass damper systems using adaptive backstepping control

2021 ◽  
pp. 107754632199887
Author(s):  
Sinan Basaran ◽  
Fevzi Cakmak Bolat ◽  
Selim Sivrioglu
Keyword(s):  
Vibration Suppression ◽  
Controller Design ◽  
Wind Load ◽  
Backstepping Control ◽  
Structural Systems ◽  
Adaptive Backstepping ◽  
Electromagnetic Mass ◽  
Flow Induced Vibration ◽  
Adaptive Backstepping Control ◽  
Mass Damper

Many structural systems, such as wind turbines, are exposed to high levels of stress during operation. This is mainly because of the flow-induced vibrations caused by the wind load encountered in every tall structure. Preventing the flow-induced vibration has been an important research area. In this study, an active electromagnetic mass damper system was used to eliminate the vibrations. The position of the stabilizer mass in the active electromagnetic mass damper system was determined according to the displacement information read on the system without using any spring element, unlike any conventional system. The proposed system in this study has a structure that can be implemented as a vibration suppressor in many intelligent structural systems. Two opposing electromagnets were used to determine the instant displacement of the stabilizer mass. The control currents to be given to these electromagnets are determined by using an adaptive backstepping control design. The adaptive controller algorithm can predict the wind load used in the controller design without prior knowledge of the actual wind load. It was observed that the designed active electromagnetic mass damper structure is successful in suppressing system vibrations. As a result, the proposed active electromagnetic mass damper system has been shown to be suitable for structural systems in flow-induced vibration damping.

Towards a standard CFD setup for wind load assessment of high-rise buildings: Part 2 – Blind test of chamfered and rounded corner high-rise buildings

2020 ◽  
Vol 205 ◽  
pp. 104282 ◽  
Author(s):  
Marie Skytte Thordal ◽  
Jens Chr Bennetsen ◽  
Stefano Capra ◽  
Andreas K. Kragh ◽  
H. Holger H. Koss
Keyword(s):  
Wind Load ◽  
Blind Test ◽  
High Rise ◽  
Rounded Corner

scholarly journals Reliability as a Key Driver for a Sustainable Design of Adaptive Load-Bearing Structures

2022 ◽  
Vol 14 (2) ◽  
pp. 895
Author(s):  
Dshamil Efinger ◽  
Andreas Ostertag ◽  
Martin Dazer ◽  
David Borschewski ◽  
Stefan Albrecht ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Construction Materials ◽  
Internal Stresses ◽  
Elastic Model ◽  
Load Spectrum ◽  
Operating Life ◽  
Load Bearing ◽  
Linear Elastic ◽  
High Rise ◽  
Bearing Structure

The consumption of construction materials and the pollution caused by their production can be reduced by the use of reliable adaptive load-bearing structures. Adaptive load-bearing structures are able to adapt to different load cases by specifically manipulating internal stresses using actuators installed in the structure. One main aspect of quality is reliability. A verification of reliability, and thus the safety of conventional structures, was a design issue. When it comes to adaptive load-bearing structures, the material savings reduce the stiffness of the structure, whereby integrated actuators with sensors and a control take over the stiffening. This article explains why the conventional design process is not sufficient for adaptive load-bearing structures and proposes a method for demonstrating improved reliability and environmental sustainability. For this purpose, an exemplary adaptive load-bearing structure is introduced. A linear elastic model, simulating tension in the elements of the adaptive load-bearing structure, supports the analysis. By means of a representative local load-spectrum, the operating life is estimated based on Woehler curves given by the Eurocode for the critical notches. Environmental sustainability is increased by including reliability and sustainability in design. For an exemplary high-rise adaptive load-bearing structure, this increase is more than 50%.

THE NOTION OF THE SYSTEM OF CIVIL PROCEDURAL LAW

2021 ◽  
Vol 11 (4) ◽  
pp. 13-26
Author(s):  
V.M. SHERSTYUK
Keyword(s):  
Internal Structure ◽  
Legal Regulation ◽  
Point Of View ◽  
Entire System ◽  
Procedural Law ◽  
The Subject ◽  
Definition Of ◽  
Constituent Elements

The study puts forward the thesis that the basis for the allocation of structural subdivisions of civil procedural law is mainly the subject of legal regulation. The complex internal structure of the system of this branch of law is due primarily to the diversity of civil procedural relations that constitute the subject of regulation of this branch of law. The work reveals the essential features of the concept of “system of civil procedural law”, defines the grounds for its structural subdivisions and their composition, gives the definition of this category. In particular, the author has formulated the idea that the system of civil procedural law is an internally coordinated set of civil procedural rules, institutions and other relatively independent structural subdivisions of this branch of law, naturally interconnected into a single whole due to the unity of civil procedural relations. Also in this study the point of view is expressed that each level of the system, as well as the entire system of civil procedural law as a whole, is characterized not only by typical features of its constituent elements, but also by their typical, regular relationships that constitute its structure.

Some issues on prevention of avalanche coloring of building structures

2021 ◽  
Vol 80 (2) ◽  
pp. 150-156
Author(s):  
B.A. Azhgaliyeva ◽  
Keyword(s):  
Structural Systems ◽  
Building Structures ◽  
High Rise

The article discusses the emergence of the problem of an avalanche collapse of a building and various ways to prevent collapse of structures. On the basis of world experience, recommendations are made for protection against avalanche collapse of high-rise buildings of various structural systems.

Timber-concrete composite frame joint for high-rise buildings

2019 ◽  
Author(s):  
Tim Höltke ◽  
Achim Bleicher
Keyword(s):  
High Strength ◽  
Specific Weight ◽  
Modular Construction ◽  
Renewable Materials ◽  
Load Bearing ◽  
Laminated Veneer Lumber ◽  
High Rise ◽  
Composite Frame ◽  
Composite Joint ◽  
First Results

<p>Timber is one of the few renewable materials that improves its structural properties when combined with concrete. The composite of timber and concrete increase stiffness and fire protection, unlike timber when used alone. In contrast to concrete structures, timber-concrete composite (TCC) structures reduce the carbon footprint and the specific weight of a building. At the Chair of Hybrid Structures - Structural Concrete of BTU Cottbus-Senftenberg a moment-resistant TCC joint was developed for multi-story frames, which can be used as a structural system for high-rise buildings. Facts like a modular construction, a fast assembly and a plug-in connection were aspects that shaped the development. A high rotational stiffness and load-bearing at the composite joint was also achieved using high strength beech laminated veneer lumber (LVL).</p><p>The TCC frame works on its own and in combination with other bracing systems. Initial investigations on the load-bearing behavior were carried out using numerical analysis followed by experiments on real-sized joints in further studies. First results will be presented in this paper. The developed TCC joint as part of structural systems offers a high variability and can thus contribute to tomorrow’s sustainable vertical growth of cities.</p>

Structural design of an over-track building with mid-story isolation

2021 ◽  
Author(s):  
Daiki Nakamizo ◽  
Seiya Kimura ◽  
Yuichi Koitabashi
Keyword(s):  
Urban Space ◽  
Structural Design ◽  
Point Of View ◽  
Transit Oriented Development ◽  
Structural Element ◽  
Basement Structure ◽  
Design Point ◽  
High Rise ◽  
Railway Operations ◽  
In Transit

<p>In order to use urban space effectively in Transit-Oriented Development (TOD), over-track buildings (built over railways), are becoming increasingly popular in Japan. From a construction and structural design point of view, the basement structure just beneath railways generally cannot be built while railway operations continue (interruption to operations is not permitted, In general).</p><p>This paper presents the structural design of a mid-story isolated high-rise building constructed over railways in Ikebukuro, Tokyo. The paper shows, not only the philosophy of the system, but also the structural design, full-scale experiments, and evaluation of the performance in each structural element. The authors believe that such a structural design will be one of the effective solutions to the over-track building.</p>

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