scholarly journals Thermal Performance Analysis of Heat Collection Wall in High-Rise Building Based on the Measurement of Near-Wall Microclimate

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 2023
Author(s):  
Ruixin Li ◽  
Yiwan Zhao ◽  
Gaochong Lv ◽  
Weilin Li ◽  
Jiayin Zhu ◽  
...  
Keyword(s):  
Wind Speed ◽  
Structural Design ◽  
Theoretical Basis ◽  
Thermal Process ◽  
Measured Data ◽  
Passive Heating ◽  
High Rise ◽  
And Performance ◽  
Wall Components ◽  
Near Wall

Near-wall microenvironment of a building refers to parameters such as wind speed, temperature, relative humidity, solar radiation near the building’s façade, etc. The distribution of these parameters on the building façade shows a certain variation based on changes in height. As a technology of passive heating and ventilation, the effectiveness of this application on heat collection wall is significantly affected by the near-wall microclimate, which is manifested by the differences, and rules of the thermal process of the components present at different elevations. To explore the feasibility and specificity of this application of heat collection wall in high-rise buildings, this study uses three typical high-rise buildings from Zhengzhou, China, as research buildings. Periodic measurements of the near-wall microclimate during winter and summer were carried out, and the changing rules of vertical and horizontal microclimate were discussed in detail. Later, by combining these measured data with numerical method, thermal process and performance of heat collection wall based on increasing altitude were quantitatively analyzed through numerical calculations, and the optimum scheme for heat collection wall components was summarized to provide a theoretical basis for the structural design of heat-collecting wall in high-rise buildings.

scholarly journals Structural Design and Performance Evaluation of a Mid-story Seismic Isolated High-Rise Building

2017 ◽  
Vol 6 (3) ◽  
pp. 227-235 ◽  
Author(s):  
Masatoshi Tamari ◽  
Tadashi Yoshihara ◽  
Masato Miyashita ◽  
Nobuyuki Ariyama ◽  
Masataka Nonoyama
Keyword(s):  
Performance Evaluation ◽  
Structural Design ◽  
High Rise ◽  
High Rise Building ◽  
And Performance

Method of Designing a Plate-like Ultra High-rise Building

2018 ◽  
Author(s):  
Shoko Okamura ◽  
Kei Muto
Keyword(s):  
Structural Design ◽  
Load Resistance ◽  
Test Results ◽  
High Rise ◽  
High Rise Building ◽  
Axial Forces ◽  
Column Joint ◽  
Strong Winds ◽  
And Performance

<p>This paper describes the method of structural design of a plate-like ultra high-rise building, taking the Shinjuku Toho Building as an example. In particular the major problems in the structural design of this building are described, namely ensuring safety during earthquakes, ensuring habitability during strong winds, and ensuring the load resistance of the columns that are subject to large axial forces. Also, the test results and performance of an "improved non-scallop method" for beam- column joint are described. Finally the method of structural designing "Godzilla’s Head" is described.</p>

Wind-induced Precipitation Undercatch of the Hellmann Gauges

1999 ◽  
Vol 30 (1) ◽  
pp. 57-80 ◽  
Author(s):  
Daqing Yang ◽  
Esko Elomaa ◽  
Asko Tuominen ◽  
Ari Aaltonen ◽  
Barry Goodison ◽  
...  
Keyword(s):  
Wind Speed ◽  
Meteorological Factors ◽  
Measured Data ◽  
Reference Standard ◽  
Measurement Instruments ◽  
Solid Precipitation ◽  
Precipitation Measurement ◽  
And Performance ◽  
Ratio Versus ◽  
Daily Time

The Hellmann gauges have been widely used as the official precipitation measurement instruments in 30 countries. From 1986 to 1993, the accuracy and performance of the Hellmann gauges were evaluated during the WMO Solid Precipitation Measurement Intercomparison at 4 stations in Finland, Russia, Germany, and Croatia. The double fence intercomparison reference (DFIR) was the reference standard used at all the Intercomparison stations. The data for the Hellmann gauges were compiled from measurements made at the 4 WMO intercomparison sites. These data represent a variety of climates, terrains and exposures. The effects of meteorological factors, such as wind speed, type of precipitation and temperature, on gauge catch efficiency were investigated. For snow and mixed precipitation, wind speed was found to be the most important factor determining the gauge catch and air temperature had a secondary effect. The relations of gauge catch ratio versus wind speed and temperature on a daily time scale were derived and presented for snow and mixed precipitation. Independent tests of the relations have been conducted at the WMO intercomparison stations and reasonable agreement between the corrected precipitation and the DFIR observation has been obtained. These relations are therefore recommended to be used for test correction of gauge measured data. It is expected that implementation of these correction procedures to the current and archived records will significantly improve the accuracy and homogeneity of precipitation data.

Structural design and mechanical performance evaluations of flexible and lightweight belt by CFRP

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040034
Author(s):  
Sung-Youl Bae ◽  
Yun-Hae Kim
Keyword(s):  
Performance Evaluation ◽  
Structural Design ◽  
Mechanical Performance ◽  
Steel Wire ◽  
Load Condition ◽  
Mechanical Tests ◽  
Wire Rope ◽  
High Rise ◽  
Reinforced Plastic ◽  
And Performance

This research presents the structural design and mechanical performance evaluation results of a lightweight belt for high-rise elevators. Weight reduction of elevator components is indispensable in developing ultra-high-rise elevators. In this study, the structural design and performance evaluation of high-rise elevator ropes were carried out. The weight of the newly designed Carbon Fiber Reinforced Plastic (CFRP) belt was reduced by 30% compared with the original steel wire rope. The structural analysis results of the CFRP belt showed that the design criteria were met on the design load condition of the belt. Also, mechanical tests were executed to verify the mechanical characteristics of the newly developed belt, with the results showing that the belt had sufficient structural performance compared with conventional steel wire rope.

Analysis of Multi-Components Force Standard Machine Loading System Based on Stewart Structure

2016 ◽  
Vol 693 ◽  
pp. 25-30
Author(s):  
Xin Luo ◽  
Chang Chun Li
Keyword(s):  
Structural Design ◽  
Theoretical Basis ◽  
Selection Method ◽  
Mechanical Measurement ◽  
Type Selection ◽  
Multiple Components ◽  
Machine Loading ◽  
Loading System ◽  
And Performance ◽  
Component Force

Multi-component force sensors are often calibrated by single component. A multi-component force standard machine based on Stewart structure can generate and measure force and torque in any direction, so the mechanical measurement and performance of multiple components can be calibrated at the same time. In this article, we analyze the loading system base on Stewart structure and present our structural design and the type selection method. We model and analyze the moving platform, the linear actuator and the whole loading system of the Stewart platform respectively. The work provides a theoretical basis for improving the accuracy and the repeatability of the loading system base on Stewart structure.

Structural design and performance evaluation of FeCo/epoxy magnetostrictive composites

2021 ◽  
pp. 108840
Author(s):  
Zhenjun Yang ◽  
Zhenjin Wang ◽  
Kenya Nakajima ◽  
Daiki Neyama ◽  
Fumio Narita
Keyword(s):  
Performance Evaluation ◽  
Structural Design ◽  
And Performance ◽  
Magnetostrictive Composites

Calculation of Weibull Distribution parameters at low wind speed and performance analysis

2021 ◽  
pp. 1-24
Author(s):  
Yusuf Alper Kaplan
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Weibull Distribution ◽  
Energy Potential ◽  
Average Wind Speed ◽  
Statistical Indicator ◽  
Low Wind Speed ◽  
Distribution Parameters ◽  
Wind Energy Potential ◽  
And Performance

In this study, the compatibility of the real wind energy potential to the estimated wind energy potential by Weibull Distribution Function (WDF) of a region with low average wind speed potential was examined. The main purpose of this study is to examine the performance of six different methods used to find the coefficients of the WDF and to determine the best performing method for selected region. In this study seven-year hourly wind speed data obtained from the general directorate of meteorology of this region was used. The root mean square error (RMSE) statistical indicator was used to compare the efficiency of all used methods. Another main purpose of this study is to observe the how the performance of the used methods changes over the years. The obtained results showed that the performances of the used methods showed slight changes over the years, but when evaluated in general, it was observed that all method showed acceptable performance. Based on the obtained results, when the seven-year data is evaluated in this selected region, it can be said that the MM method shows the best performance.

Automation of seismic design of high-rise structure with braced steel frame

2021 ◽  
Author(s):  
Xin Zhao ◽  
Gang Wang ◽  
Jinlun Cai ◽  
Junchen Guo
Keyword(s):  
Seismic Performance ◽  
Seismic Design ◽  
Structural Design ◽  
Structure Design ◽  
Steel Frame ◽  
Design Methods ◽  
Automatic Design ◽  
Component Level ◽  
Design Algorithm ◽  
High Rise

<p>With the continuous development and progress of society, the structure of high-rise buildings has been paid more and more attention by the engineering community. However, the existing high- rise structure design methods often have a lot of redundancy and have a lot of room for optimization. Most of the existing seismic design methods of high-rise structures are based on engineering experience and manual iterative methods, so that the efficiency of design can not meet the needs of the society. if the method of design automation is adopted, the workload of designers can be greatly reduced and the efficiency of structural design can be improved. Based on the digital modeling theory, this paper proposes a MAD automatic design algorithm, in which the designer provides the initial design of the structure, and the algorithm carries out the modeling, analysis, optimization and design of each stage of the structure, and finally obtains the optimal structure. The structural design module of this algorithm starts from the component level, when the component constraint design meets the limit requirements of the specification, it enters and completes the component constraint design and the global constraint design of the structure in turn. In this paper, taking a ten-story braced steel frame high-rise structure as an example, the optimal design is carried out, and its seismic performance is analyzed. the results show that the MAD automatic design algorithm can distribute the materials to each part reasonably, which can significantly improve the seismic performance of the structure and realize the effective seismic design.</p>

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