Modern Lightweight Structures

2016 ◽  
Vol 824 ◽  
pp. 42-49
Author(s):  
Zsuzsanna Vanik ◽  
Martin Magura
Keyword(s):  
Civil Engineering ◽  
Point Of View ◽  
Tensegrity Structures ◽  
Lightweight Structures ◽  
Tensegrity Systems ◽  
Cable Domes

Aim of this paper is to show modern lightweight structures based on tensegrity systems. Principles of tensegrity structures and cable domes are shown. Last part of this paper is demonstrated how to join simple tensegrity prisms to tensegrity slabs. These structures are very interesting from architectonical point of view, they are made from fully recyclable material – steel and consumption of material is very low. Tensegrity structures have a great potential of the development of modern civil engineering.

scholarly journals Self-stress control of real civil engineering tensegrity structures

2018 ◽  
Author(s):  
Joanna Kłosowska ◽  
Paulina Obara ◽  
Wojciech Gilewski
Keyword(s):  
Civil Engineering ◽  
Tensegrity Structures ◽  
Stress Control

scholarly journals On BRT Spread around the World: Analysis of Some Particular Cities

2020 ◽  
Vol 5 (10) ◽  
pp. 88
Author(s):  
Salvatore Trubia ◽  
Alessandro Severino ◽  
Salvatore Curto ◽  
Fabio Arena ◽  
Giovanni Pau
Keyword(s):  
Public Transport ◽  
Autonomous Vehicles ◽  
Social Impact ◽  
High Efficiency ◽  
Civil Engineering ◽  
Road Transport ◽  
Point Of View ◽  
Transport Systems ◽  
Economic Point

The goal of civil engineering has always been the research and implementation of methods, technologies, and infrastructures to improve the community’s quality of life. One of the branches of civil engineering that has the strongest effect on progress is transport. The quality of transport has a profound economic and social impact on our communities regarding trade (freight transport) and city livability (public transport systems). However, innovation is not the only way to improve the features above-mentioned, especially public transport, considering that it is usually beneficial to enhance and repurpose vehicles with appropriate adjustments to offer more efficient services. Other perspectives that influence public transport systems are the costs and times of design and construction, maintenance, operating costs, and environmental impact, especially concerning CO2 emissions. Considering these issues, among the various types of existing public transport systems, those of the so-called Bus Rapid Transit (BRT) offer worthwhile results. The BRT system is a type of public road transport operated by bus on reserved lanes, and it is significantly profitable, especially from an economic point of view, in areas where there are existing bus routes. Nonetheless, for the construction of works minimization, it is closely linked to other features that improve its usefulness, depending on the vehicles’ quality such as capacity, but above all, the propulsion or driving autonomy that would guarantee high efficiency. This paper introduces an analysis of some BRT systems operating worldwide, presenting the background, general technical features, and the correlation with autonomous vehicles.

scholarly journals IMPROVING RESILIENCE IN ARCHITECTURAL HERITAGE? THE RECONSTRUCTION OF THE VAULTING SYSTEMS AFTER THE 1805 EARTHQUAKE IN MOLISE (ITALY)

2020 ◽  
Vol XLIV-M-1-2020 ◽  
pp. 921-928
Author(s):  
L. Romano
Keyword(s):  
Southern Italy ◽  
Point Of View ◽  
Architectural Heritage ◽  
Large Area ◽  
Lightweight Structures ◽  
Clay Bricks ◽  
Construction Techniques ◽  
Poor Region ◽  
Formal Point

Abstract. The 1805 earthquake damaged a large area of the Southern Italy, destroying most of the architectural heritage in the “Contado of Molise”, a poor region characterized by numerous medieval towns. In the aftermath of the catastrophe, the reconstruction and in fewer cases the restoration of important buildings, mainly the ecclesiastical ones, took place without a well-defined rebuilding plan. If, from a formal point of view, interesting design levels were not reached, the same cannot be stated for the construction solutions adopted, especially regarding vaulted systems. Actually, they were conceived either with wood, concrete with aggregates or full/hollow clay bricks. This variety of constructive raw elements is a direct manifestation of the richness of the vernacular constructive tradition. Moreover, the intrinsic lightness of such materials suggests as well the need at the time of new lightweight structures capable of standing on pre-existing weakened masonries. This approach was probably taken in order to reduce vulnerability and improve structural resilience to earthquakes. In light of these considerations, the paper focuses on the different construction techniques used to rebuild the vaulting systems after the 1805 earthquake in Molise, discussing their potentialities and weaknesses as well as their capacity to improve resilience in the architectural heritage.

scholarly journals Survey of applications of discrete vortex method in civil engineering.

2009 ◽  
Vol 5 (2) ◽  
pp. 029-038 ◽  
Author(s):  
Tomasz Nowicki
Keyword(s):  
Fluid Dynamics ◽  
Civil Engineering ◽  
Vortex Method ◽  
Point Of View ◽  
Discrete Vortex ◽  
Discrete Vortex Method ◽  
Computer Fluid Dynamics

This paper includes an introduction to Discrete Vortex Method (DVM) and its comparison with other methods of computer fluid dynamics. In its second part it focuses on the most important applications of DVM from the civil engineering point of view. Some examples known form literature are presented theoretical as well as experimental.

scholarly journals Applications of Tensegrity Structures in Civil Engineering

2015 ◽  
Vol 111 ◽  
pp. 242-248 ◽  
Author(s):  
Wojciech Gilewski ◽  
Joanna Kłosowska ◽  
Paulina Obara
Keyword(s):  
Civil Engineering ◽  
Tensegrity Structures

scholarly journals Time Reduction for Completion of a Civil Engineering Construction Using Fuzzy Clustering Techniques

2017 ◽  
Vol 45 (1) ◽  
pp. 25 ◽  
Author(s):  
Gaetano Bosurgi ◽  
Federico Carbone ◽  
Orazio Pellegrino ◽  
Giuseppe Sollazzo
Keyword(s):  
Fuzzy Clustering ◽  
Execution Time ◽  
Civil Engineering ◽  
Variable Number ◽  
Point Of View ◽  
Data Mining Technique ◽  
Engineering Construction ◽  
Definition Of ◽  
Operational Constraints ◽  
Positive Results

In the civil engineering field, there are usually unexpected troubles that can cause delays during execution. This situation involves numerous variables (resource number, execution time, costs, working area availability, etc.), mutually dependent, that complicate the definition of the problem analytical model and the related resolution. Consequently, the decision-maker may avoid rational methods to define the activities that could be conveniently modified, relying only on his personal experience or experts’ advices. In order to improve this kind of decision from an objective point of view, the authors analysed the operation correction using a data mining technique, called Fuzzy Clustering. This allows the analysts to represent complex real scenarios and classify the various activities according to their influence on the reduction of the total execution time. The proposed procedure provides positive results that are also in compliance with significant operational constraints, such as the control of costs and areas needed by the workers to perform the tasks. Finally, it is possible to increase the input variable number preserving the algorithm simplicity and avoiding lacks of accuracy in the final numerical outcomes.

Deployable Structures

2012 ◽  
Vol 83 ◽  
pp. 122-131 ◽  
Author(s):  
Andrea E. del Grosso ◽  
Paolo Basso
Keyword(s):  
Inverse Kinematics ◽  
Civil Engineering ◽  
Variable Geometry ◽  
Deployable Structures ◽  
Form Finding ◽  
Tensegrity Structures ◽  
Structural Types ◽  
Kinematic Behaviour ◽  
Pneumatic Structures

Deployable structures have been developed for many different applications from space to mechanical and civil engineering. In the paper the general concepts of deployable structures, combining static and kinematic behaviour are presented first, also discussing their relationships with adaptive and variable geometry structures. Reported applications to civil engineering and architecture are then reviewed and categorized. The characteristics of the following systems are summarized : 1. Pneumatic Structures. 2. Tensegrity Structures. 3. Scissor-like Structures. 4. Rigid Foldable Origami. 5. Mutually Supported Structures. The problems of form finding, direct and inverse kinematics, actuation and self-deployability for some of the most interesting among the above structural types are then discussed in the paper. Some examples involving rigid foldable origami and mutually supported structures are finally presented.

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