scholarly journals THE SUSTAINABILITY OF BAMBOO MATERIALS IN THE BUMI PEMUDA RAHAYU BAMBOO HALL BUILDING

2021 ◽  
Vol 6 (01) ◽  
pp. 58-73
Author(s):  
Gallus Presiden Dewagana ◽  
Kamal A. Arif
Keyword(s):  
Quantitative Methods ◽  
Material Selection ◽  
Construction Material ◽  
Design Stage ◽  
Special Treatment ◽  
Structural System ◽  
Sustainable Materials ◽  
Complex Structural ◽  
Object Of Study ◽  
System Selection

Abstract - The issue of global warming strongly encourages architects to use sustainable materials to preserve nature. Bamboo material is an ecological and sustainable material. Bamboo is also predicted as a future material. The strengths and advantages of bamboo are very likely to be used as a building construction material. Unfortunately, it is not uncommon for bamboo material to be used inappropriately so that it does not optimize the ecological and sustainable properties of bamboo. The object of study chosen was the Bumi Pemuda Rahayu bamboo hall. This object is close to the concept of sustainability as seen from the function of the building, which is a co-creating space that prioritizes sustainability-related activities. This research uses qualitative-quantitative methods that will compare the theory regarding the concept of sustainability of materials related to the building material life cycle with the data obtained. The concept will be divided into three aspects, namely design aspects, construction aspects, and maintenance and renovation aspects. These three aspects can be examined by knowing the object data related to these aspects. The results of the study will answer whether the use of bamboo material in the object of study is in accordance with the concept of sustainability of the bamboo material. The analysis of the design stage pays attention to material selection, material preservation, how to optimize the age of bamboo and the selection of a structural system. The construction stage is analyzed by considering the type of connection used. The maintenance and renovation phases are analyzed by paying attention to how to renovate the bamboo structure and post-construction maintenance of the building. This building is appropriate in choosing the type of material, applying preservation of bamboo materials, and successfully preventing bamboo from environmental influences in order to reach its optimal age. In terms of structural system selection, this building is also appropriate by applying the arc rod structural system. Bolted joints are appropriate for complex structural systems, it's just that there must be special treatment at the base of the arc structure that receives the greatest load due to cracks. Renovation and maintenance aspects must be considered again because this building will have difficulty if you have to do renovations, especially on the arc structure. Maintenance that is rarely performed can also reduce the life of the building.   Key Words: bamboo, sustainable materials, Bumi Pemuda Rahayu

scholarly journals Material Origins of Accelerated Operational Wear of RD-33 Engine Blades

2020 ◽  
Author(s):  
Adam Kozakiewicz ◽  
Stanislaw Jóźwiak ◽  
Przemysław Jóźwiak ◽  
Stanisław Kachel
Keyword(s):  
Chemical Composition ◽  
Construction Material ◽  
Operating Conditions ◽  
Design Stage ◽  
Strength Analysis ◽  
Jet Engine ◽  
Emergency Situations ◽  
Low Pressure Turbine ◽  
Propulsion Unit ◽  
Selection Of

The structural and strength analysis of the material used to construct such an important engine element as the turbine is of great significance, both at the design stage as well as during tests and expertises related to emergency situations. Bearing in mind the conditions above mentioned, the paper presents the results of research on the chemical composition, morphology and phased structure of the metallic construction material used to produce the blades of the high and low pressure turbine of the RD-33 jet engine, which is the propulsion unit of the MiG-29 aircraft. The data obtained as a result of the material tests of the blades allowed, on the basis of the analysis of chemical composition and phased structure, to determine the grade of the alloy used to construct the tested elements of the jet engine turbine. The structural stability of the material was found to be lower in comparison with engine operating conditions, which manifested itself as a clear decrease in the resistance properties of the blade material. The results obtained can be used as a basis for analyzing the life span of an object or a selection of material replacements, which enable to produce the analyzed engine element.

scholarly journals A Prototype Expert System for the Selection of Road Construction Materials

2007 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
S. Hassim ◽  
K.T. Teh ◽  
R. Muniandy ◽  
H. Omar ◽  
A. Hassan
Keyword(s):  
Expert System ◽  
Knowledge Base ◽  
Material Selection ◽  
Construction Material ◽  
Construction Materials ◽  
Road Construction ◽  
Statistical Testing ◽  
Factors Affecting ◽  
Microsoft Access ◽  
Programming Tool

A prototype for an expert system in road construction material selection system, which is based on the outcomes of Friedman and multiple comparisons statistical methods was developed. The outcomes were acquired through questionnaires from selected pavement experts. The factors affecting pavement materials under each particular site condition were incorporated into the specific rules of the system. The system knowledge-base was extracted from the statistical testing outcomes and then rearranged and compiled prior to the development of the system. Visual Basic 6.0 was adopted as the programming tool for development of the system, while the knowledge-base of the separate system was kept in Microsoft Access 2000. The prototype expert system can be used to emulate part of the professional reasoning capabilities based on the knowledge of a pavement expert or a specialist to solve problems on materials selection. The system can help road designers to improve their professional ability to evaluate all available materials even before carrying out any laboratory tests.

scholarly journals Design of Pre Blasting (Pre-Splitting) in Tan Cang Quarry NO.1 in Vietnam

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Nguyen An Dinh ◽  
Thai Hop PHAM ◽  
Cong Dien LE ◽  
Quang Hieu TRAN ◽  
Dinh Bao TRAN
Keyword(s):  
Rock Mass ◽  
Construction Material ◽  
Slope Angle ◽  
Design Stage ◽  
Surrounding Area ◽  
Annual Output

Nowadays, construction material quarries in Dong Nai Province are exploiting with large quarrying depth, and the annual output could reach to tens of million cubic meters. The blasting frequency could be reached to hundreds of times, so the frequency is the major reason decreasing the cohesion of rock mass. Therefore, the surrounding area of blasting holes is broken, especially the area next to the final border where bench slope angle is not implemented as that of design stage, as well as the back break, also causes fractures on the bench slope, resulting in instability and unsafety due to falling rock. In this paper, the author also wants to introduce the pre blasting and the method to define blasting parameters to increase the stabilization of Slopes in Tan Cang quarry NO.1 in Vietnam.

Design for maintainability tool for nano-façade coating applications on high-rise facades in the tropics

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sheila Conejos ◽  
Aristotle Ubando ◽  
Michael Yit Lin Chew
Keyword(s):  
Environmental Impact ◽  
Quantitative Methods ◽  
Design Stage ◽  
Design Decision ◽  
Safety Measures ◽  
Content Type ◽  
High Rise ◽  
Negative Environmental Impact ◽  
Design For Maintainability ◽  
Façade Coatings

PurposeThe self-cleaning properties of nanostructured titanium dioxide facade coatings are useful in Singapore's tropical climate. However, its potential maintenance issues need to be determined right at the design stage. The purpose of this paper is to highlight the development of the design for maintainability tool which is a multicriteria design decision score sheet that evaluates the maintainability potential of nano-facade coating applications on high-rise façades with concrete and stonemasonry finishes and curtain walls.Design/methodology/approachQuantitative methods (expert and practitioner surveys) are conducted in this research study. Analytic hierarchy process (AHP) and sensitivity analysis were used to develop a robust Design for Maintainability tool.FindingsSafety measures indicator received the highest weighted score by experts, while the maximizing performance, minimizing risk, minimizing negative environmental impact and minimizing consumption of matter and energy were the top ranking main criteria by both experts and practitioners. The top ranked design for maintainability sub-criteria identified by practitioners and experts were risk management, maintenance considerations, climatic conditions, safety measures, lifecycle cost and maintenance access, sun's path, rainfall intensity, biological growth measures and building age profile.Originality/valueMost researches on the maintainability of nano-façade coatings uses experimentation to test the durability of nano-façade coatings, while this study focuses on design based empirical data such as establishing and ranking the list of design for maintainability criteria or indicators to minimize future defects and maintenance issues. The design for maintainability tool contributes to the maintainability of nano-façade coatings leading to maximizing its performance while minimizing cost, risks, resource consumption and negative environmental impact.

scholarly journals Kinematics of the Lumbo–Pelvic Complex under Different Loading Conditions

2019 ◽  
Vol 5 (1) ◽  
pp. 347-349
Author(s):  
Martin Weidling ◽  
Christian Voigt ◽  
Toni Wendler ◽  
Martin Heilemann ◽  
Michael Werner ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Axial Rotation ◽  
Image Correlation ◽  
Loading Conditions ◽  
Structural System ◽  
Lateral Bending ◽  
Test Rig ◽  
Hip Joints ◽  
Complex Structural ◽  
The Right

AbstractThe lumbo-pelvic complex is a highly complex structural system. The current investigation aims to identify the kinematics between interacting bone segments under different loading conditions. A specimen of the lumbo-pelvic complex was obtained from a human body donor and tested in a self-developed test rig. The experimental setup was designed to imitate extension, flexion, right and left lateral bending and axial rotation to the left and to the right, respectively. The vertebra L3 was firmly embedded and load was introduced via hip joints. Using a digital image correlation (DIC) system, the 3D motions of 15 markers at different landmarks were measured for each loadcase under cyclic loading. For each loadcase, the kinematics were analyzed in terms of three-dimensional relative movements between L3 and the sacrum. The usefulness of the experimental technique was demonstrated. It may serve for further biomechanical investigations of relative motion of sacroiliac and vertebral joints and deformation of bony structures.

Sustainable Design Through Flexible Product Evolution

2004 ◽  
Author(s):  
Michael Van Wie ◽  
Robert B. Stone ◽  
Daniel A. McAdams
Keyword(s):  
Material Selection ◽  
Sustainable Design ◽  
Design Method ◽  
New Technology ◽  
Empirical Studies ◽  
Design Stage ◽  
Vast Number ◽  
Product Evolution ◽  
S Curve ◽  
Over Time

Sustainable design defined broadly is the problem of designing environmentally benign products so that the environment can be maintained with minimal negative effects from the product throughout the product’s entire lifecycle. This research investigates how sustainable design can be achieved at the conceptual design stage. Although sustainability encompasses a vast number of issues ranging from energy efficient solutions, design for disassembly, recycling, proper material selection, and improved manufacturing choices, the research focus of this work is on the particular issue of product evolution as it relates to the flexibility of a product or concept. Product evolution, often powered by new technology, erases the market competitiveness of concepts over time and impacts flexibility on the design effort side. Specifically, how does the designer develop concepts that can at least partially be reused and adapted to the next product generation with minimal effort? One answer is to design flexible concepts that can incur unknown future changes with maximum concept reuse. Flexibility in this context implies the property of a concept, physical solution, component, or product, to be robust and tolerant to generally unavoidable evolutionary changes. The challenge is to know how to configure a product to satisfy this requirement. As part of this research, we perform empirical studies of product evolution to determine evolutionary trends. Product evolution is measured in the broad terms of product performance over time. The goal is to predict when a product should evolve by either 1) moving from the lower plateau of an S-curve to the higher plateau or 2) jumping to a new S-curve being prepared to do so in a sustainable manner. That is, the objective is to allow companies to be able to reuse components or platforms (including reconditioning and recycling), tooling as well as design and manufacturing staff. The key toward this goal is an understanding how products evolve and what conditions coincide with product change. The approach is to investigate the types of changes (evolutions) that lead to flexible (sustainable) designs. The results of this research can be used for a prescriptive approach in developing a sustainable design method that relies on this newly acquired knowledge of product evolution.

Investigations Into Creep Behavior of Gas Turbine Component Assemblies

2012 ◽  
Author(s):  
Kotur S. Raghavan
Keyword(s):  
Nonlinear Analysis ◽  
Gas Turbines ◽  
Material Selection ◽  
Rupture Life ◽  
Compressive Force ◽  
Design Stage ◽  
Creep Properties ◽  
Threaded Fasteners ◽  
Parametric Studies ◽  
Joint Behavior

Modern day gas turbines are very complex in construction and consist of a very large number of smaller parts and subassemblies. Hence the most vital parts of the entire assembly are the mechanical devices which are deployed to connect and keep them together. In gas turbines two approaches are normally used in the assembly process. They are the threaded fasteners such as bolt and nut and shrunk-fit or interference-fit assemblies. In the high temperature regions of the gas turbines the effect of creep on the integrity of such fastening arrangements needs to be assessed at the design stage. A problem commonly faced pertains to lack of creep data which would facilitate detailed nonlinear analysis. The available data invariably exhibit scatter. In this paper parametric studies are undertaken. Creep curves are chosen so that both primary and secondary stages are accounted for. The coefficients are chosen to meet the design needs. The performance of bolted joints and shrunk-fit assemblies get affected over time due to stress relaxation leading to loss of bolt pretension or the effective interference. The bolt preload as well as the interference is to be optimally chosen. Higher the preload or the interference the more effective is the joint. At the same time the stress levels are higher and hence the stresses will relax to a greater extent. For a design stage assessment of the behavior of assemblies there is need for correlation among the various operating parameters such as stress, temperature and time. For individual components one normally uses empirical correlations such as Larson-Miller to predict rupture life and also creep growth. For assemblies in which relaxation is the main design issue, such parameters are usually not available. There is need to carry out detailed nonlinear analysis. Typical bolted flange and shrink-fit assemblies are chosen for study. Parametric studies are carried out. Using creep properties as described earlier, nonlinear structural responses are studied. The purpose is to correlate the creep properties, in terms of creep strain with respect to time, stress and temperature, with the joint behavior. The key joint behavior indices are the bolt tensile stress in the case of threaded fastening and the compressive force of “effective interference” in the case of shrunk-fit assemblies. The studies have established the need for rigorous creep analysis of components having interference fits or threaded fasteners. Once the operational requirements are known, the approach presented helps in material selection.

scholarly journals Integrated TRIZ-AHP Support System for Conceptual Design

2014 ◽  
Vol 548-549 ◽  
pp. 1998-2002 ◽  
Author(s):  
M.U. Rosli ◽  
M.K.A. Ariffin ◽  
S.M. Sapuan ◽  
S. Sulaiman
Keyword(s):  
Problem Solving ◽  
Conceptual Design ◽  
Support System ◽  
Material Selection ◽  
Problem Definition ◽  
Design Stage ◽  
Root Cause ◽  
Solution Generation ◽  
Computer Based ◽  
Root Cause Identification

.Amid the fierce rising competition in the market, accelerating the problem solving and decision making process have become major issues in product design especially in conceptual design stage. For years, Theory of Inventive Problem Solving (TRIZ) has been extensively applied in problem solving. In this paper, Analytical Hierarchy Process (AHP) was proposed to strengthen three major steps in TRIZ methodology namely as problem definition, root cause identification and solution generation. The integration was then structured in the form of computer-based system. The integration, application and software in AHP and TRIZ method have been discussed in this paper. This proposed support system not only provided evidence that TRIZ methodologies improved by the support of AHP and also aided the designers in early design phase such as concept, process and material selection.

StructNet: A Neural Network for Structural System Selection

1994 ◽  
Vol 9 (2) ◽  
pp. 109-118 ◽  
Author(s):  
John I. Messner ◽  
Victor E. Sanvido ◽  
Soundar R. T. Kumara
Keyword(s):  
Neural Network ◽  
Structural System ◽  
System Selection
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