scholarly journals Development of Material Combination Model Considering Economics and Construction Efficiency for G-SEED Certification

2021 ◽  
Vol 13 (6) ◽  
pp. 3535
Author(s):  
Byung-Ju Jeon ◽  
Byung-Soo Kim
Keyword(s):  
Structural Design ◽  
Material Selection ◽  
Selection Model ◽  
Construction Costs ◽  
Seed Certification ◽  
Evaluation Scores ◽  
The Cost ◽  
Material Information ◽  
Business As Usual ◽  
Construction Efficiency

The Korean government proposed a goal to reduce its greenhouse gas emissions by 37% compared to business-as-usual levels by 2030 and launched the Green Standard for Energy and Environmental Design (G-SEED) certification system. The certification requires meeting the required score and material selection with a secured economy and construction efficiency. However, most buildings only focus on obtaining the certification scores instead of choosing economical materials with high construction efficiency. This research focused on developing a material selection model that considers both the construction efficiency and economy of the materials and the acquisition of material and resource evaluation scores from the G-SEED certification. This research, therefore, analyzed actual data to automate the material selection and compare alternatives to using a genetic algorithm to obtain optimized alternatives. This model proposes an alternative to constructability and economy when the required score and material information is entered. When the model was applied to actual cases, the result revealed a reduction in construction costs of about 37% compared to the cost with the traditional methods. The material selection model from this research can benefit construction project owners in terms of cost reduction, designers in terms of structural design time, and constructors in terms of construction efficiency

scholarly journals Overdesign of Villa Structures in Oman

2015 ◽  
Vol 12 (2) ◽  
pp. 68
Author(s):  
A.S. Alnuaimi ◽  
M. Al Mohsin ◽  
A. Hago ◽  
S. El Gamal
Keyword(s):  
Construction Industry ◽  
Structural Design ◽  
Field Survey ◽  
Construction Costs ◽  
Code Of Practice ◽  
The Difference ◽  
Clear Cases ◽  
Almost All ◽  
The Cost ◽  
Residential Projects

Residential projects represent the largest section of the construction industry in Oman. It is widely claimed that designers in Oman tend to unnecessarily overdesign structures, thereby aggravating construction costs. The aim of this research was to investigate the existence and extent of structural overdesign through the investigation of 31 villas which were approved by Muscat Municipality between 2000–2010. The specified villas were structurally redesigned based on the British Code of Practice using the same geometry and material strengths recorded in the drawings. The required reinforcement resulting from the redesign work was compared with the provided reinforcement as per the drawings. The results showed clear cases of extra reinforcement in almost all villas. The difference between required and provided reinforcements in the villas ranged from 2.3– 104.8%, with an average of 48.5% and a standard deviation of 24.0. The required and provided weights of reinforcement per square meter of the built-up area ranged from 25.7–71 and 40.9–87.9 kg/m2, respectively. The largest differences between the required and provided reinforcement were in the slabs, followed by the footings. A field survey of consultants and municipality engineers indicated that the most notable reasons for overdesign are the absence of authorized agents specialized in reviewing structural design, a lack of an engineering licensing system in Oman, and the phenomenon of experienced engineers leaving design offices for better paying jobs elsewhere. Finally, the cost implication of overdesign is minor compared to the overall cost of building. 

scholarly journals Automatic Estimation System of Building Frames Integrated with Structural Design Information (AutoES)

2015 ◽  
pp. 224-231
Author(s):  
Chaeyeon Lim ◽  
Donghoon Lee ◽  
Won-Kee Hong ◽  
Sunkuk Kim
Keyword(s):  
Cost Estimation ◽  
Structural Design ◽  
Construction Costs ◽  
Building Frames ◽  
Design Information ◽  
Automatic Estimation ◽  
Project Participants ◽  
Estimation System ◽  
The Cost ◽  
Structural Engineers

The project participants, including clients, architects, structural engineers and contractors would want to know accurate construction costs as soon as the design is completed. However, it may take at least several weeks for the cost estimation after the structural design and drawings are completed, depending on the project scale or size. Quantity surveying in manual is time-consuming and taken by lots of effort. Even if computerized software is used, it takes a lot of time to insert structural design information to the software. In addition, the estimated cost may result in inaccurate quantity owing to the drawing errors or quantity surveyors’ mistake, as well as it is not an exact quantity for actual construction, exposing numerous problems at the construction phase. For instance, to accurately estimate the quantity of rebar, some additional effort is required such as preparing the bar bending schedule. Such problems occur by the communication gap and viewpoint difference among project participants who perform structural designs, draft the structural drawings and estimate quantity. But, if structural design information can be automatically received for quantity estimation, an exact quantity can be estimated without omission or errors. To solve those problems, this study proposes automatic estimation System of building frames integrated with structural design information (AutoES). Using the algorithms provided by AutoES, the task of cost estimation can be accomplished with an exact bill of quantity including a bar bending schedule without errors, mistakes, or omission within a week, which used to take at least 4 weeks.

scholarly journals Methodology for the Concept Design of Locally Reinforced Composites

2021 ◽  
Vol 11 (16) ◽  
pp. 7246
Author(s):  
Julius Moritz Berges ◽  
Georg Jacobs ◽  
Sebastian Stein ◽  
Jonathan Sprehe
Keyword(s):  
Cost Estimation ◽  
Structural Design ◽  
Early Stage ◽  
Parameter Study ◽  
Great Effort ◽  
Concept Design ◽  
Cost Weight ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
The Cost

Locally load-optimized fiber-based composites, the so-called tailored textiles (TT), offer the potential to reduce weight and cost compared to conventional fiber-reinforced plastics (FRP). However, the design of TT has a higher complexity compared to FRP. Current approaches, focusing on solving this complexity for multiple objectives (cost, weight, stiffness), require great effort and calculation time, which makes them unsuitable for serial applications. Therefore, in this paper, an approach for the efficient creation of simplified TT concept designs is presented. By combining simplified models for structural design and cost estimation, the most promising concepts, regarding the cost, weight, and stiffness of TT parts, can be identified. By performing a parameter study, the cost, weight, and stiffness optima of a sample part compared to a conventional FRP component can be determined. The cost and weight were reduced by 30% for the same stiffness. Applying this approach at an early stage of product development reduces the initial complexity of the subsequent detailed engineering design, e.g., by applying methods from the state of the art.

scholarly journals Harnessing Wind Energy Potential in ASEAN: Modelling and Policy Implications

2021 ◽  
Vol 13 (8) ◽  
pp. 4279
Author(s):  
Youngho Chang ◽  
Phoumin Han
Keyword(s):  
Wind Energy ◽  
Carbon Emissions ◽  
Policy Implications ◽  
Wind Generation ◽  
Energy Potential ◽  
Trade Model ◽  
Electricity Trade ◽  
Generation Capacity ◽  
The Cost ◽  
Business As Usual

This study examines whether and how harnessing more wind energy can decrease the cost of meeting the demand for electricity and amount of carbon emissions in the Association for Southeast Asian Nations (ASEAN) region, using the ASEAN integrated electricity trade model. Three scenarios are considered: a counterfactual business-as-usual (BAU) scenario, which assumes no wind energy is used; an actual BAU scenario that uses the wind-generation capacity in 2018; and a REmap scenario, which employs the wind-generation capacity from the Renewable Energy Outlook for ASEAN. Simulation results suggest that dispatching more wind energy decreases the cost of meeting the demand for electricity and amount of carbon emissions. However, these emissions increase during the late years of the study period, as the no- or low-emitting energy-generation technologies are crowded out.

Approach for Effective Design and Cost Estimation of New built / Conversion FPSO (2014)

2014 ◽  
Author(s):  
Upendra Malla ◽  
Krishna M. Karri
Keyword(s):  
Cost Estimation ◽  
Structural Design ◽  
Effective Means ◽  
Step Method ◽  
Support Design ◽  
Field Development ◽  
Early Stages ◽  
The Cost ◽  
Offshore Field ◽  
Effective Design

Floating Production Storage and Offloading (FPSO) sizing and cost estimation has become a challenging task at the early stages of offshore field development. During the early stages of field development designer needs to size and estimate cost in order to decide feasibility of the project. This paper describes a step by step method used to size and estimate the cost of a new built (or) converted FPSO based on basic engineering, existing FPSO data and corresponding metocean criteria for a particular location. This step by step approach covers FPSO sizing, hull structural design, mooring sizing, topsides support design and steel renewal using offshore classification rules and regulations. FPSO cost is estimated based on the design particulars (i.e. hull weights, FPSO particulars, mooring sizes etc.) and current market unit rates. This approach is an effective means to size and estimate cost of an FPSO at early stages of field development which saves overall time and cost for a client.

The Development of the New Volvo Class

2013 ◽  
Author(s):  
Britton Ward ◽  
Chris Cochran
Keyword(s):  
Quality Control ◽  
Structural Design ◽  
Manufacturing Technology ◽  
Design Standards ◽  
Control Procedures ◽  
Dramatic Shift ◽  
Construction Efficiency

For the 2014-15 Volvo Ocean Race, the organizing authority made a dramatic shift in direction for the next two editions of the race opting to move to a smaller, less expensive yacht built to exceptionally strict one design standards. This paper outlines some of the motivations for this shift and details some of the critical features of the new Volvo Ocean 65 design and how they compare to solutions on the previous Volvo Open 70 yachts. Discussion of the logistical complexities involved in building the fleet of boats in the required time is also discussed. A review of the structural design is included to illustrate the efforts to improve construction efficiency, reduce cost and dramatically improve robustness of the yacht structures while minimizing the weight additions that result. Finally we review some of the extensive quality control procedures and manufacturing technology that has been employed in an effort to achieve a fleet of one design yachts that are as identical as possible.

scholarly journals UTILIZING SITE CHARACTERISTICS IN NEURAL NETWORK MODELLING OF PERCENTAGE COST-TIME OVERRUN OF BUILDING PROJECTS

2017 ◽  
Vol 8 (1) ◽  
pp. 1-15
Author(s):  
A. O. Ujene ◽  
A. A. Umoh
Keyword(s):  
Neural Network ◽  
Cost Overrun ◽  
Construction Costs ◽  
Network Modelling ◽  
Building Projects ◽  
The Neural Network ◽  
Site Characteristics ◽  
Neural Network Prediction ◽  
The Cost ◽  
Prediction Approach

This study evaluated the site characteristics influencing the time and cost delivery of building projects, determined the range of percentage cost and time overrun and developed a neural network model for predicting the percentage cost and time overrun using the site characteristics of building projects. The study evaluated twelve site characteristics and two performance indicators obtained from records of construction costs, contract documents, and valuation reports of 126 purposively sampled building projects spread across several cities in Nigeria. Analyses were with descriptive and artificial neural network. It was concluded that with fairly favourable site characteristics, cost overrun range reached 77.95% with a mean variation of 44.36%, while time overrun range reached 51.23% with a mean variation of 26.77%. It was found that the accuracy performance levels of 91.93% and 91.43% for the cost and time overrun predictions respectively were very high for the optimum models. Building projects have eight significant site characteristics which can be used to reliably predict the percentage overrun, among which the ground water level, level of available infrastructure and labour proximity around the site are the most important predictors of cost and time overrun. The study recommended that project owners, consultants, contractors and other stakeholders should always use the eight identified site characteristics in predicting percentage cost and time overrun, with more priority on the first three characteristics. The study also recommended the neural network prediction approach due to its prediction accuracy.

scholarly journals PEMBERDAYAAN NAPI PEREMPUAN LAPAS WAY HUI MELALUI KERAJINAN RAJUTAN DAN PERHITUNGAN PENENTUAN HARGA JUAL PRODUK

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Halimah Halimah ◽  
Sushanty Saleh ◽  
Pebrina Swissia
Keyword(s):  
Human Resources ◽  
Criminal Law ◽  
Life Skills ◽  
Material Selection ◽  
Class Ii ◽  
Female Prisoners ◽  
Form Of Life ◽  
Coaching Skills ◽  
Cost Of Production ◽  
The Cost

Female prisoners in these prisons become prisoners because they are entangled in various types of criminal law with various crimes committed by women such as due to many factors, leading to reasons for fulfilling the needs of those concerned. For this reason, there is a need for guidance for female prisoners as a form of self-empowerment to improve human resources in the form of life skills. Coaching skills provided by the Proposal Community Procurement team, namely training in the form of handicraft knitting. Knitted handicrafts that have been produced by inmates at the A Way Hui class II prisons include prayer hats, cellphone wallets, restleting wallets, and various kinds of brooches. Knitted products have a fairly high exclusivity value. These female prisoners are expected to succeed in making / producing creative and innovative knitted works seen from various aspects, namely aspects of material selection aspects, in addition the female prisoners are also given training to determine the cost of production and cost of goods sold from their knits.

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