scholarly journals Nanotechnological Developments in Structural Design: Load-Bearing Materials

2017 ◽  
Vol 7 (5) ◽  
pp. 1900-1903
Author(s):  
Z. Y. Ilerisoy ◽  
Y. Takva

Nanotechnology has a wide field of possible applications that includes the design, manufacture and application of nanomaterials and nanostructures. The selection of materials is an issue of significant importance to the construction industry. Concrete, steel and wood materials are considered as the main load-bearing materials in building construction and due to nanotechnological developments advanced application possibilities have been provided. The aim of this study is to systematically examine the nanotechnological developments on concrete, steel and wood which are used as load-bearing materials. The materials’ properties and the steps that enable these properties are considered and the advantages brought by the use of nanotechnology are tabulated. The differences in the molecular level of materials exhibiting behaviors different from those of conventional scale equivalents are shown.

2019 ◽  
Vol 258 ◽  
pp. 02001
Author(s):  
Doddy Prayogo

In recent years, a number of studies have successfully transformed various models for biological collective behavior into intelligent optimization algorithms. These bio-inspired optimization techniques have been developed to provide better solutions than traditional methods to a variety of engineering problems. This paper attempts to apply and compare recent bio-inspired algorithms for determining the best layout of construction temporary facilities. To validate the performance of the proposed techniques, an actual building construction project was used as a test problem. Based on the obtained results, the performance of each bio-inspired algorithm is highlighted and discussed. This paper presents beneficial insights to decision-makers in the construction industry that are involved in handling optimization problems.


Author(s):  
Jan Krejsa ◽  
Miroslav Sýkora

Abstract This paper is focused on the reliability analysis of an existing reinforced concrete bridge from 1908. The load bearing capacity is assessed in accordance with valid standards using updated partial factors and the partial factors for structural design. Load bearing capacities obtained by these methods are critically compared. The application of the updated partial factors leads to 15% higher load bearing capacity than the ordinary partial factor method used for structural design.


2016 ◽  
Vol 690 ◽  
pp. 57-64
Author(s):  
Shuji Sakaguchi

ISO/TC206 'Fine ceramics' is one of a technical committee (TC) in the International Organization for Standardization (ISO), established in 1992. The first plenary meeting for this TC was held in 1994, and the latest meeting was held in August 2015, in Jeju, Republic of Korea. The scope of this TC covers very wide field concerning the ceramic materials for industrial applications, in forms of powders, monoliths, coatings and composites, and in functions of mechanical, thermal, chemical, electrical, magnetic, optical and their combinations. This TC consists of 18 participating member (P-member) countries and 13 observing member (O-member) countries. We already have 81 published standards from this TC. About 30 new work items are under discussion, about 15 items are waiting for starting the discussion, and about 10 items are in the process for revision of the published standards. In this TC, we have 12 working groups. More than twenty years have passed since starting this TC, generally speaking, the categories of the discussed items tends to shift, from some testing methods for fundamental properties (strength, density, thermal properties etc.), to some properties for specified applications, such as ceramic bearing materials, photocatalytic materials and electrical applications.


2011 ◽  
Vol 109 ◽  
pp. 400-404
Author(s):  
Yan Hong Yang ◽  
Da Fu Ni

Performance and working principle of high-efficiency multi-cyclone were analyzed, and the structural design shortage of original high-efficiency multi-cyclone was pointed out. Its structure was researched and designed, including determination of setting chamber and pipe number, selection of material and the design of cyclones.


2016 ◽  
Vol 43 (4) ◽  
pp. 287-293 ◽  
Author(s):  
Yong-Woo Kim ◽  
Seung-Heon Han ◽  
June-Seong Yi ◽  
SooWon Chang

The effect of ‘supply chain management’ can be leveraged when benefits of collaboration within and beyond the capacities of individual organizations are witnessed. One of the primary tasks in reducing total supply chain costs is to understand where the costs occur in a supply chain and how each activity impacts the total supply chain costs. Most supply chains in construction usually involve multiple entities, each one in a different process. A rebar supply chain is one example where many entities are involved in different processes. The supply chain coordinator needs a supply chain cost model, which shows how each activity impacts all supply chain costs to reduce the total costs. The research suggests a supply chain cost model using time-driven activity-based costing. The proposed cost model was applied to a building construction project, followed by sensitivity analysis identifying critical activities. This method can be adapted to analyze other fragmented material supply chains in the construction industry.


1999 ◽  
Vol 17 (4) ◽  
pp. 519-527 ◽  
Author(s):  
AVIAD SHAPIRA ◽  
CLIFFORD J. SCHEXNAYDER

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