scholarly journals ADVANTAGES OF MONOPOLE TRANSMISSION TOWER WITH NEW GENERATION CONDUCTORS

2020 ◽  
Author(s):  
Ramesh Bantupalli ◽  
Sharon Potireddy ◽  
Baljai K.V.G.D ◽  
Santhosh Kumar B
Keyword(s):  
Urban Areas ◽  
Transmission Tower ◽  
Pipe Section ◽  
Composite Conductors ◽  
Safety Parameter ◽  
Lattice Tower ◽  
New Generation ◽  
Line Design ◽  
Code Procedure ◽  
Loading Procedure

This paper made an attempt to enlighten the safety parameter of monopole withthe Lattice tower transmission line design in urban areas, where required right of wayis constraint. Pipe section for monopole and a four-legged section for lattice towerhave been chosen as tower profiles. The new generation composite conductors andSteel Reinforced conductors’ properties have been examined for an integral approach.The analysis is carried out with IS 802 (Part-1/Sec-1): 2015 and IS 875(Part3)-2015revised code versions for 60 m height and 250 m span. It is concluded that theMonopole pipe sections are 6.7% less in weight than the four-legged lattice tower withcomposite conductors. While comparing the design philosophy of IS 802:2015 codeand IS 875-2015 versions, former code contributed an economic design whencompared to IS 875-2015 loading procedure. It is further extended that in terms ofweight comparison, monopole and four-legged towers have illustrated as 30% &9.18% less in comparison with IS 875 Code procedure.

Theoretical and Experimental Research on Joint Slippage Effects of Lattice Angle Steel Tower

2013 ◽  
Vol 477-478 ◽  
pp. 660-665
Author(s):  
Zhang Qi Wang ◽  
Ze Ming Song ◽  
Wen Qiang Jiang
Keyword(s):  
Axial Force ◽  
Numerical Models ◽  
Element Model ◽  
Test Results ◽  
Bolted Joint ◽  
Transmission Tower ◽  
Hybrid Finite Element ◽  
Lattice Tower ◽  
Angle Steel ◽  
Bolt Diameter

In lattice angle steel transmission tower, as the bolt diameter is small and member connection is relatively thin, lower clamping force is commonly used in bolted joint. It is common in lattice tower during full tower tests, joint slippage occur even under design load. However, traditionally trussed beam hybrid finite element model without explicitly considering slippage effects has been widely used in the analysis of the tower. In this paper, the HD-1 tower was experimentally studied under various static load cases, and several numerical models with including joint eccentricity and slippage are established. After comparing the theoretical analysis results and the experimental results, the following conclusions are presented: joint eccentricity almost has not effects on leg member axial force; Among all the studied load cases, joint slippage effects the leg member force most under torsional condition than the other load conditions; Numerical model with including joint slippage effects yield much better axial force results in leg member compared with experimental test results.

scholarly journals Religiosity as a Predictor of Consumer Ethical Behaviour: Some Evidence from Young Consumers from Malaysia

2008 ◽  
Vol 3 (4) ◽  
Author(s):  
Zulkufly Ramly ◽  
Lau Teck Chai ◽  
Choe Kum Lung
Keyword(s):  
Undergraduate Students ◽  
Urban Areas ◽  
Accounting Students ◽  
Ethical Behaviour ◽  
Ethical Orientation ◽  
Kuala Lumpur ◽  
Public And Private ◽  
Young Consumers ◽  
Illegal Activities ◽  
New Generation

Young consumers group has been a growing population of consumers in Malaysia. The group is increasingly cosmopolitan in its outlook and preferences, and highly exposed to various media and advertising tactics. As Malaysia is rapidly moving towards industrialised and modern economy, the changing socio-economic factors, growing affluence and declining moral and religious standards, especially in urban areas can play an important role in shaping the ethical orientation of young consumers. This research examined the role of religiosity in determining the ethical attitudes of young consumer groups in Malaysia. Undergraduate students represent the new generation of young consumers group. Hence, two hundred and seventy eight undergraduate business and accounting students in public and private universities in Kuala Lumpur, Malaysia were surveyed for this purpose. This research found limited evidence to support the hypothesis that religiosity was a positive determinant of young consumers’ ethical beliefs in Malaysia. Further, the results also revealed that male young consumers were more willing to benefit from illegal activities as well as to passively benefit at the expense of others than did the female students.

Infrastructure Sustainability

2011 ◽  
pp. 212-229
Author(s):  
Herath Thilakarathna ◽  
David Thambiratnam ◽  
Manicka Dhanasekar ◽  
Nimal Perera
Keyword(s):  
Urban Areas ◽  
Sustainable Design ◽  
Impact Damage ◽  
Concrete Columns ◽  
Research Information ◽  
Simulation Techniques ◽  
Vulnerability Assessments ◽  
Simplified Method ◽  
New Generation ◽  
The Impact

<P>Infrastructure engineering and sustainable design are among the important drivers of sustainable development. Increased industrialisation has brought to the forefront the susceptibility of concrete columns (in both buildings and bridges) to vehicle impacts. Accurate vulnerability assessments are crucial in the design process due to the possibly catastrophic nature of the failures that can occur. This chapter reports on research undertaken to investigate the impact capacity of columns of low to medium raised buildings designed according to the Australian standards. Numerical simulation techniques were used in the process and validation was done by using experimental results published in the literature. The investigation thus far has confirmed the vulnerability of typical columns in five story buildings located in urban areas to medium velocity car impacts. Hence, these columns need to be re-designed or retrofitted. In addition, accuracy of the simplified method presented in EN 1991-1-7 to quantify the impact damage was scrutinised. A simplified concept to assess the damage caused by all collision modes was introduced. The research information will be extended to generate a common database to assess the vulnerability of columns in urban areas to the new generation of vehicles.</P> <P>&nbsp;</P>

Advanced Hybrid Ion Conducting Ceramic Composites and Applications in New Fuel Cell Generation

2007 ◽  
Vol 280-283 ◽  
pp. 413-418 ◽  
Author(s):  
Bin Zhu
Keyword(s):  
Fuel Cell ◽  
Ceramic Composites ◽  
Cell System ◽  
Nano Composites ◽  
Oxygen Ion ◽  
Oxygen Ion Conductors ◽  
Composite Conductors ◽  
Ion Conducting ◽  
New Generation ◽  
Ion Conductors

Our developments on ceramic composite conductors have experienced about 15 years from the oxyacid-salts oxide proton-based conductors, non-oxide containment salts, the ceria-based composite electrolytes, hybrid proton and oxygen ion conductors and nano-composites. A special emphasis is paid to new functional nano-composites based on hybrid proton and oxygen ion conductors that have demonstrated advanced properties and fuel cell applications, e.g., excellent ionic conductivity of 0.01 to 1 Scm-1 and performances of 200 - 1000 mWcm-2 for temperatures achieved for fuel cells between 400 and 700°C. Some proton and oxygen ion conducting mechanisms in the materials are reviewed and discussed. The hybrid ion conduction and dual electrode reactions and processes create a new generation fuel cell system.

The Research of Strengthening Measures to the Space Type KK-Intersecting Nodes in the Steel Pipe Tower of Power Transmission

2013 ◽  
Vol 639-640 ◽  
pp. 1104-1107
Author(s):  
Wei Kong ◽  
Ran Yin ◽  
En Ming Zhang ◽  
Peng Yin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Power Transmission ◽  
Steel Pipe ◽  
Transmission Tower ◽  
Analysis Software ◽  
Element Analysis ◽  
Pipe Section ◽  
Practical Engineering ◽  
Ring Stiffener

At present, the round steel pipe section is used more often in the transmission tower. This paper introduces the strengthening measures to the steel pipe node, which shows that ring-stiffener is a kind of very good strengthening measure. Then it is focus on the research of ultimate bearing capacity of the space type KK-intersecting nodes by the ANSYS finite element analysis software. Try to find the differences between the node with ring-stiffener and without ring-stiffener. Get the conclusions through the analysis and comparison, and provide a reference for practical engineering.

scholarly journals New Housing Concepts: Modular, Circular, Biobased, Reproducible, and Affordable

2021 ◽  
Vol 13 (24) ◽  
pp. 13772
Author(s):  
Leo Oorschot ◽  
Thijs Asselbergs
Keyword(s):  
Supply Chain ◽  
Affordable Housing ◽  
Urban Areas ◽  
Residential Buildings ◽  
Scale Up ◽  
Housing Associations ◽  
Dutch Housing ◽  
Innovative Materials ◽  
Open Floor ◽  
New Generation

For a moment, it seemed that the architect had disappeared from the construction supply chain for sustainable and affordable housing provided by Dutch housing associations. Large contractors were making direct agreements with housing associations and wanted to scale up production with their housing factories. However, with the ‘So You Think You Can BUILD’ challenge, architects, consultancies, and contractors reinvented themselves within the construction supply chain and acquired a position as providers of circular building concepts. The aim of this challenge is to stimulate providers of homes to design and produce (in great numbers) affordable and sustainable houses. This not only scales up building production in empty fields but also within difficult and dense build urban areas. A whole new generation of Dutch architects, consultancies, and contractors working in collaboration are now intensively involved with circular and biobased residential buildings, innovative materials and production processes. They are managing to provide attractive products for housing associations and other clients. In the first part of 2021, ‘So You Think You Can BUILD’ challenged teams of designers, engineers and contractors to develop new concepts, with the three winners applying the principles of the ‘passive house’, which is modular and circular, as well as a smart building skin and smart core with open floor space in between.

scholarly journals Cooperative Transmission Tower Inspection with a Vehicle and a UAV in Urban Areas

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 326 ◽  
Author(s):  
Ju Wang ◽  
Guoqiang Wang ◽  
Xiaoxuan Hu ◽  
He Luo ◽  
Haiqing Xu
Keyword(s):  
Urban Areas ◽  
Programming Model ◽  
Cooperative Transmission ◽  
Planning Problem ◽  
Transmission Tower ◽  
Simulation Experiments ◽  
Inspection Method ◽  
Transmission Towers ◽  
Aerial Vehicle ◽  
Path Planning Problem

To reduce the workload of inspectors and improve the inspection efficiency of urban transmission towers, a new inspection method is proposed in this paper, in which an unmanned aerial vehicle (UAV) and vehicle cooperate with each other. We investigate the cooperative path planning problem of a UAV and a vehicle for transmission tower inspection and develop a new 0–1 integer programming model to address the problem. An odd-even layered genetic algorithm (O-ELGA) is proposed to efficiently solve the model. Finally, the effectiveness of the algorithm is further verified by simulation experiments.

A new generation of urban areas: Feasibility elements

2015 ◽  
pp. 1445-1449 ◽  
Author(s):  
Saverio Miccoli ◽  
Fabrizio Finucci ◽  
Rocco Murro
Keyword(s):  
Urban Areas ◽  
New Generation

scholarly journals 1D/2D porosity model for urban flood modeling: case of a dense street networks

2018 ◽  
Vol 40 ◽  
pp. 06010
Author(s):  
Pascal Finaud-Guyot ◽  
Pierre-André Garambois ◽  
Shangzhi Chen ◽  
Guilhem Dellinger ◽  
Abdellah Ghenaim ◽  
...  
Keyword(s):  
Urban Areas ◽  
Mitigation Measures ◽  
Flood Modeling ◽  
Urban Floods ◽  
Urban Flood ◽  
Urban Networks ◽  
Cut Cell ◽  
Flow Features ◽  
Prediction Systems ◽  
New Generation

An increasing urbanization of floodplains has led to higher vul- nerability of urban areas and building a new generation of robust, accurate and computationally affordable models dedicated to urban floods is highly re- quired for improving prediction systems and mitigation measures. A better understanding of urban floods hydrodynamics may also be required. In view to achieve computationally affordable and reliable simulations a new 1D/2D parsimonious hydraulic model Flood1D2D is introduced for flood modeling in complex branched urban networks. It takes advantage of a cut-cell technique and a new effective model able to take into account some essential sub-grid flow features such as flow vein contractions due to recirculations downstream of a crossroad. It is shown that this local phenomenon can be correctly repro- duced thanks to this 1D/2D coupled SW model parameterized with roughness and porosity. The ability of the model to reproduce realistic flood discharge distributions at the subdistrict scale is also tested on a part of the branched net- work of ICUBE experimental rig. Further studies should tackle the issues of calibration and unsteady modeling.

scholarly journals Evaluation of Seismic Performance of Steel Lattice Transmission Towers

2020 ◽  
Vol 6 (10) ◽  
pp. 2024-2044
Author(s):  
Uğur Albayrak ◽  
Loai A. M. Morshid
Keyword(s):  
Finite Element ◽  
Seismic Performance ◽  
Element Model ◽  
Seismic Zone ◽  
Transmission Tower ◽  
Transmission Towers ◽  
Ice Loads ◽  
Lattice Tower ◽  
Overhead Power Lines ◽  
Low Sensitivity

The electricity transmission systems are an important lifeline for modern societies. They are used for overhead power lines as supporting structures. Transmission towers are designed to meet electrical and structural requirements. They are designed according to the weight of conductors and environmental effects such as wind and ice loads. They also considered other extraordinary stresses such as cable breakage and ice-breaking effects. Because of a common perception that transmission line (TL) towers show low sensitivity to earthquakes, the effects of the earthquake in TL tower construction are not considered. For this reason, TL towers are investigated with regard to the seismic performance in this study. The principal objectives of this research are: i) to assess the sensitivity of typical TL towers to earthquake loads, ii) to retrofit an existing steel lattice tower using a new section Centre To Center (CTC). In this study, a finite element model of a representative 154 KV transmission tower in Turkey was performed using a set of 10 recorded earthquake ground movements. The four-legged square TL tower has been analyzed and designed for Turkey, Eskisehir seismic zone considering 42.95 m height using finite element (FE) software. Therefore, a new section Centre To Center (CTC) type has been designed and the failed sections have been replaced with a designed section using the SAP2000 section designer. The results show that the load of failure increased after retrofitting. The retrofitting method was effective and easily conducted in fields. Doi: 10.28991/cej-2020-03091600 Full Text: PDF

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