scholarly journals Structural Design of a Jacket Platform to the Colombian Caribbean Sea

2016 ◽  
Vol 10 (19) ◽  
pp. 61
Author(s):  
Jairo H. Cabrera ◽  
Jair Macía Ávilar
Keyword(s):  
Numerical Model ◽  
Structural Design ◽  
Theoretical Foundation ◽  
Caribbean Sea ◽  
Wave Theory ◽  
Type Structure ◽  
Analysis Model ◽  
Offshore Structure ◽  
New Type

This research paper summarizes the study of the requirements and basic theoretical foundation for the development of structural design of fixed platform type Jacket, resulting in the proposal for a analysis model for this type of offshore structure. Aspects related with cinematics evaluation, selecting of wave theory and hydrodynamic proper formula are also considered in the calculation of acting forces and the need for local metocean data in the analysis. A case study of application of the model for a new type structure jacket RC-5 Block of the Colombian Caribbean is also presented including its geometry proposed and some results of the numerical model procedures.

Static Analysis of Gravity Dams Considering Foundation-Structure Interaction

2016 ◽  
Vol 857 ◽  
pp. 237-242
Author(s):  
Margaret Abraham ◽  
Bennet Kuriakose ◽  
Reni Kuruvilla
Keyword(s):  
Numerical Model ◽  
Structural Design ◽  
Seismic Analysis ◽  
Structural Response ◽  
Fluid Structure Interactions ◽  
Gravity Dams ◽  
Structure Interaction ◽  
Optimum Depth ◽  
Foundation Structure

A dam is an artificial barrier constructed across a stream channel to impound water. Analysis of stresses and displacements are inevitable for the structural design and failure analysis of dams. This paper deals with the numerical simulation of structural response of gravity dams, duly considering the foundation-structure interaction. The optimum depth and width of foundation extend to be considered in the numerical model is also studied. A parametric study based on the stiffness of the foundation is also exercised. As an application of the developed model, a case study of Peechi gravity dam is presented. This study proved the importance of consideration of foundation-structure interaction in the structural analysis of dams. The developed numerical model can be further improved for performing seismic analysis of gravity dams, considering the foundation-structure as well as fluid-structure interactions.

scholarly journals Evaluation and Analysis Model of the Length of Added Displaced Left-Turn Lane Based on Entropy Evaluation Method

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Binghong Pan ◽  
Jinfeng Ying ◽  
Shasha Luo ◽  
Yang Shao ◽  
Shangru Liu ◽  
...  
Keyword(s):  
Design Process ◽  
Traffic Congestion ◽  
Evaluation Method ◽  
Design Method ◽  
Urban Traffic ◽  
Assessment Model ◽  
Analysis Model ◽  
Left Turn ◽  
New Type

As the number of vehicles continues to grow in China, the problem of urban traffic congestion gets more serious, particularly at intersections. As a new type of unconventional intersection, the displaced left-turn (DLT) intersection has been widely recognized to improve the efficiency of intersections with heavy left-turn traffic flows. Converting an existing intersection into an intersection with additional DLT lanes is a valuable solution. However, the studies on DLT intersections mainly focus on performance, applicability, and safety. The guidelines on the specific engineering design process mostly come from experience, and the study on the considering multifactor design method is still insufficient. Therefore, this paper proposed an evaluation and analysis model of the lengths of added DLT lanes based on the entropy evaluation method, in which VISSIM and Surrogate Safety Assessment Model (SSAM) software were adopted for simulation. A design process for the length of the added DLT lanes was proposed with this model. An urban intersection in Xi’an was taken as a case study, and the application of the model and the design process was studied in detail. After selecting four evaluation indicators, the model was applied to calculate and analyze the optimal length of the added DLT lanes under 45 different traffic volume combinations. The recommended lengths of different situations were within the range recommended in the guidebook published by Federal Highway Administration. The results of the case study proved that the model proposed in this paper was advanced, reasonable, and practical.

Friction Pendulum TMD and its Control Effectiveness for Wind-Induced Vibration

2014 ◽  
Vol 584-586 ◽  
pp. 2037-2042
Author(s):  
Li Qin ◽  
Wei Ming Yan ◽  
Zheng Li
Keyword(s):  
Frictional Force ◽  
Structural Design ◽  
Wind Loads ◽  
3D Analysis ◽  
Analysis Model ◽  
Control Effectiveness ◽  
Non Linear ◽  
New Type ◽  
Friction Pendulum ◽  
Wind Induced Vibration

A new type of frictional pendulum TMD is designed. The wind-induced vibration of Henan Art Center Symbolic Tower with and without TMD is analyzed. The structural design of frictional pendulum TMD is presented in detail. The equivalent analysis model is established. The 3D analysis of the symbolic tower is established using SAP2000. The non-linear LINK unit in SAP2000 is used to simulate frictional pendulum TMD. Then, the non-linear analysis of wind control effectiveness of frictional pendulum TMD is carried out. The analysis results demonstrate that optimal frictional force can be chosen according to design wind loads and the control effectiveness can be over 30% with the chosen frictional force under 0.3 to 2 times of the designed wind loads.

scholarly journals Floating-bending tensile-integrity structures

2021 ◽  
Vol 8 (1) ◽  
pp. 89-95
Author(s):  
Micol Palmieri ◽  
Ilaria Giannetti ◽  
Andrea Micheletti
Keyword(s):  
Structural Design ◽  
Membrane Systems ◽  
Limit States ◽  
Form Finding ◽  
Supported Membrane ◽  
Tensegrity Systems ◽  
Matlab Implementation ◽  
Diamond Type ◽  
Conceptual Work

Abstract This is a conceptual work about the form-finding of a hybrid tensegrity structure. The structure was obtained from the combination of arch-supported membrane systems and diamond-type tensegrity systems. By combining these two types of structures, the resulting system features the “tensile-integrity” property of cables and membrane together with what we call “floating-bending” of the arches, a term which is intended to recall the words “floating-compression” introduced by Kenneth Snelson, the father of tensegrities. Two approaches in the form-finding calculations were followed, the Matlab implementation of a simple model comprising standard constant-stress membrane/cable elements together with the so-called stick-and-spring elements for the arches, and the analysis with the commercial software WinTess, used in conjunction with Rhino and Grasshopper. The case study of a T3 floating-bending tensile-integrity structure was explored, a structure that features a much larger enclosed volume in comparison to conventional tensegrity prisms. The structural design of an outdoor pavilion of 6 m in height was carried out considering ultimate and service limit states. This study shows that floating-bending structures are feasible, opening the way to the introduction of suitable analysis and optimization procedures for this type of structures.

Deep learning and complex network theory based analysis on socialized manufacturing resources utilisations and an application case study

2021 ◽  
pp. 1063293X2110031
Author(s):  
Maolin Yang ◽  
Auwal H Abubakar ◽  
Pingyu Jiang
Keyword(s):  
Deep Learning ◽  
Complex Network ◽  
Network Models ◽  
Neural Network Models ◽  
Complex Network Theory ◽  
New Type ◽  
Manufacturing Resource ◽  
Manufacturing Resources ◽  
Resource Characteristics

Social manufacturing is characterized by its capability of utilizing socialized manufacturing resources to achieve value adding. Recently, a new type of social manufacturing pattern emerges and shows potential for core factories to improve their limited manufacturing capabilities by utilizing the resources from outside socialized manufacturing resource communities. However, the core factories need to analyze the resource characteristics of the socialized resource communities before making operation plans, and this is challenging due to the unaffiliated and self-driven characteristics of the resource providers in socialized resource communities. In this paper, a deep learning and complex network based approach is established to address this challenge by using socialized designer community for demonstration. Firstly, convolutional neural network models are trained to identify the design resource characteristics of each socialized designer in designer community according to the interaction texts posted by the socialized designer on internet platforms. During the process, an iterative dataset labelling method is established to reduce the time cost for training set labelling. Secondly, complex networks are used to model the design resource characteristics of the community according to the resource characteristics of all the socialized designers in the community. Two real communities from RepRap 3D printer project are used as case study.

scholarly journals Effects of Infills in the Seismic Performance of an RC Factory Building in Pakistan

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 276
Author(s):  
Nisar Ali Khan ◽  
Giorgio Monti ◽  
Camillo Nuti ◽  
Marco Vailati
Keyword(s):  
Numerical Model ◽  
Construction Materials ◽  
Building Codes ◽  
Construction Technique ◽  
Infill Walls ◽  
Mortar Strength ◽  
Materials Used ◽  
Seismic Response Of Buildings

Infilled reinforced concrete (IRC) frames are a very common construction typology, not only in developing countries such as Pakistan but also in southern Europe and Western countries, due to their ease of construction and less technical skills required for the construction. Their performance during past earthquakes has been in some cases satisfactory and in other cases inadequate. Significant effort has been made among researchers to improve such performance, but few have highlighted the influence of construction materials used in the infill walls. In some building codes, infills are still considered as non-structural elements, both in the design of new buildings and, sometimes, in the assessment of existing buildings. This is mainly due to some difficulties in modeling their mechanical behavior and also the large variety of typologies, which are difficult to categorize. Some building codes, for example, Eurocode, already address the influence of infill walls in design, but there is still a lack of homogeneity among different codes. For example, the Pakistan building code (PBC) does not address infills, despite being a common construction technique in the country. Past earthquake survey records show that construction materials and infill types significantly affect the seismic response of buildings, thus highlighting the importance of investigating such parameters. This is the object of this work, where a numerical model for infill walls is introduced, which aims at predicting their failure mode, as a function of some essential parameters, such as the friction coefficient between mortar and brick surface and mortar strength, usually disregarded in previous models. A comprehensive case study is presented of a three-story IRC frame located in the city of Mirpur, Pakistan, hit by an earthquake of magnitude 5.9 on 24 September 2019. The results obtained from the numerical model show good agreement with the damage patterns observed in situ, thus highlighting the importance of correctly modeling the infill walls when seismically designing or assessing Pakistani buildings that make use of this technology.

Acceptance, Endurance, and Meaninglessness: A Qualitative Case Study on the Mourning Tasks of Parental Death From Childhood Experience to Adolescence

2021 ◽  
pp. 003022282110244
Author(s):  
Niñoval Flores Pacaol
Keyword(s):  
Theoretical Foundation ◽  
Qualitative Case Study ◽  
Parental Death ◽  
Existence Of God ◽  
Personal Belief ◽  
New Meanings ◽  
Strong Attachment ◽  
Mourning And Melancholia ◽  
Cognitive Attitude

Bereavement and mourning are arguably one of the research interests of psychologists, psychoanalysts, and psychiatrists since Freud’s publication of Mourning and Melancholia. This paper is a qualitative case study that sought to examine the mourning experience of the participant from childhood until his adolescence. For theoretical foundation, the four tasks of mourning primarily developed by James Worden was utilized for the proper direction of the research inquiry; namely: a.) accepting the reality of death; b.) experiencing the feeling of grief; c.) adjusting and creating new meanings in the post-loss world; and d.) reconfiguring the bond with the lost person. The paper finds that the participant’s cognitive attitude, emotional experiences, and personal observations of the environment enable him to overcome actively (in an overlapping manner) the three tasks of mourning. However, the failure to find an enduring connection with his deceased parents is not a result of strong attachment but with the absence of personal belief about the meta-existence of God.

scholarly journals Exploring the Transformation in the ‘Spirit of Place’ by Considering the Changed and Unchanged Defensive Spaces of Settlements: A Case Study of the Wugoushui Hakka Settlement

Land ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 490
Author(s):  
Yan-Feng He ◽  
Chie-Peng Chen ◽  
Rung-Jiun Chou ◽  
Hai-Feng Luo ◽  
Jin-Xiong Hou
Keyword(s):  
Sense Of Belonging ◽  
Theoretical Foundation ◽  
Cultural Preservation ◽  
Street Network ◽  
Context Analysis ◽  
Network Nodes ◽  
Site Analysis ◽  
Spirit Of Place ◽  
Depth Interviews

Over generations, economic development has accelerated traditional settlements in Taiwan while losing traditional culture. In Hakka villages, this is manifested in the changes in defensive spaces, the ‘spirit of place,’ and land use. Although some progress has been made through research into related issues, a correlated view has been missing. To explore the connection between the ‘spirit of place’ and defensive spaces in Wugoushui, a traditional representative settlement in Taiwan, this paper probes three questions: What are the changes in defensive spaces? What are the changes in the spirit of place? What are the connections between them? Taking the sixteen criteria of secure defensive space as the theoretical foundation, through more than a year of structured observations and in-depth interviews with ten representative residents, and based on context analysis and site analysis of the information collected, this paper has concluded that, although the actual functionality of Wugoushui settlement’s spiritual, behavioural, and physical defences have disappeared, cultural characteristics related to the settlement traditions, including religious beliefs, trust, sense of belonging, street network, nodes, institutions, territory, and social networks, constitute a concrete manifestation of the defensive space and the spirit of place as of today. This research contributes to developing a theory of the relevance of the spirit of place to the defensive space of settlements from a sustainability perspective and improving the cultural preservation and land management of traditional settlements.

scholarly journals Fuzzy or Non-Fuzzy? A Comparison between Fuzzy Logic-Based Vulnerability Mapping and DRASTIC Approach Using a Numerical Model. A Case Study from Qatar

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1288
Author(s):  
Husam Musa Baalousha ◽  
Bassam Tawabini ◽  
Thomas D. Seers
Keyword(s):  
Fuzzy Logic ◽  
Numerical Model ◽  
Vulnerability Assessment ◽  
Anthropogenic Impacts ◽  
Groundwater Vulnerability ◽  
Vulnerability Mapping ◽  
Anthropogenic Contamination ◽  
Weighted Overlay ◽  
Vulnerability Maps

Vulnerability maps are useful for groundwater protection, water resources development, and land use management. The literature contains various approaches for intrinsic vulnerability assessment, and they mainly depend on hydrogeological settings and anthropogenic impacts. Most methods assign certain ratings and weights to each contributing factor to groundwater vulnerability. Fuzzy logic (FL) is an alternative artificial intelligence tool for overlay analysis, where spatial properties are fuzzified. Unlike the specific rating used in the weighted overlay-based vulnerability mapping methods, FL allows more flexibility through assigning a degree of contribution without specific boundaries for various classes. This study compares the results of DRASTIC vulnerability approach with the FL approach, applying both on Qatar aquifers. The comparison was checked and validated against a numerical model developed for the same study area, and the actual anthropogenic contamination load. Results show some similarities and differences between both approaches. While the coastal areas fall in the same category of high vulnerability in both cases, the FL approach shows greater variability than the DRASTIC approach and better matches with model results and contamination load. FL is probably better suited for vulnerability assessment than the weighted overlay methods.

The Research and Simulation Analysis of a New Type of Translational Transmission Device

2014 ◽  
Vol 556-562 ◽  
pp. 1408-1412
Author(s):  
Zhi Qiang Zhang
Keyword(s):  
Modeling And Simulation ◽  
Theoretical Foundation ◽  
Simulation Analysis ◽  
Structural Modeling ◽  
Structural Features ◽  
Practical Application ◽  
Optimization Analysis ◽  
New Type ◽  
Mechanism Parameter ◽  
Relationship Of

In this paper, the following work is done: a new type of translational transmission device is designed; explained in detail are the operating principle, structural features, relationship of mechanism parameter and non interference conditions of the movement; the optimization analysis of transmission device is implemented on the basis of non interference conditions of the bucket movement; structural modeling and simulation analysis are carried out by utilization of Pro/e & Recurdyn; and based on virtual prototype technology, the new type of translational transmission device is verified by experiments, the data of which prove the translational transmission device reasonable and practicable. In conclusion, this paper has laid the theoretical foundation of the practical application of the translational transmission device.

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