• Title/Summary/Keyword: design and construction approach

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A Hierarchical Approach for Design Analysis and Optimization of Framed Structures (프레임 구조의 계층적 설계 해석 및 최적화)

  • Hwang, Jin Ha;Lee, Hak Sool
    • Journal of Korean Society of Steel Construction
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    • v.12 no.1 s.44
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    • pp.93-102
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    • 2000
  • Substructuring-based hierarchical approach for design analysis and optimization of structural frames is presented in this study. The conceptual framework of this method is in the hierarchical modeling for design processes as well as structural systems and the methodology combining substructuring analysis and multilevel optimization. Mathematical models for analysis and synthesis are established on the common basis of substructuring systems. Modularized behavioral analysis, design sensitivity analysis and optimization are linked and integrated on the mathematical and structural basis of substructuring. Substructures are coordinated with the active constraints for system level and the weight ratio criteria. Numerical examples for test frames show the validity and effectiveness of the present approach.

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Profit-oriented Impact Analysis of Demand Management Strategy on Design-Build Firms Using System Dynamics

  • Yoo, Wi-Sung
    • Journal of the Korea Institute of Building Construction
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    • v.12 no.2
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    • pp.169-182
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    • 2012
  • In the past, a strategic management of work demands has been increasingly challenged to design-build (DB) firms. Such a management is capable of providing sufficient profitable impact of a project on them. Total project profit is mainly related to actual resources, work completion time, amount of rework, and costs. The degree of recycling work packages in the DB project delivery system is used as a measure of the quality of the performed work. However, there are few models available to evaluate the impact of a demand management strategy on the DB firms and to predict its behavior. We propose a decision-making support model as an aid for assessing the amount of rework and for predicting project profit resulting in a convincible demand management strategy. This model is constructed by using a dynamic feedback approach that can analyze the problems arising in complex managerial systems. For the purpose of illustration, widely acceptable strategies were applied into the model to explore their impacts on the DB firms. The results indicate that the model is helpful for the managers in selecting the most appropriate demand management strategy for successfully achieving their objectives.

AR system for FAB construction management using BIM data under fast track condition (패스트트랙 환경에서 FAB신축을 지원하는 BIM기반 AR 시스템 개발)

  • Lee, Sang-Won;Lee, Kwang-Soo;Choi, Sung-In;Ryu, Seong-Chan;Park, Jung-Seo
    • Journal of KIBIM
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    • v.12 no.4
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    • pp.1-18
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    • 2022
  • New Fabrication Facility (FAB) construction is performed with Building Information Modeling (BIM) based design. The BIM design data keep updated during the FAB construction. To improve fast-track construction management, a Fabrication Facility Augmented Reality (FABAR) was developed. This study introduces a FABAR system development process and shows performance evaluation results of the FABAR prototype system. The FABAR is implemented with three major modules: Augmented Reality (AR) visualization unit (Room-box) to transfer big BIM data to AR data, AR registration and tracking unit to match AR with real scape and to keep AR coordination in real, and AR data management unit to enhance usability. The prototype performance results were as follows: visualization of design BIM data via AR within 24 hours, precise AR registration and tracking registration, and appropriate usability to support FAB construction management at site. The results indicate that the FABAR is applicable for FAB construction management. Especially, the BIM data transformation method using Room-box in this study signifies a new construction management approach using fluctuating BIM design data in the fast track construction condition.

An interpretable machine learning approach for forecasting personal heat strain considering the cumulative effect of heat exposure

  • Seo, Seungwon;Choi, Yujin;Koo, Choongwan
    • Korean Journal of Construction Engineering and Management
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    • v.24 no.6
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    • pp.81-90
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    • 2023
  • Climate change has resulted in increased frequency and intensity of heat waves, which poses a significant threat to the health and safety of construction workers, particularly those engaged in labor-intensive and heat-stress vulnerable working environments. To address this challenge, this study aimed to propose an interpretable machine learning approach for forecasting personal heat strain by considering the cumulative effect of heat exposure as a situational variable, which has not been taken into account in the existing approach. As a result, the proposed model, which incorporated the cumulative working time along with environmental and personal variables, was found to have superior forecast performance and explanatory power. Specifically, the proposed Multi-Layer Perceptron (MLP) model achieved a Mean Absolute Error (MAE) of 0.034 (℃) and an R-squared of 99.3% (0.933). Feature importance analysis revealed that the cumulative working time, as a situational variable, had the most significant impact on personal heat strain. These findings highlight the importance of systematic management of personal heat strain at construction sites by comprehensively considering the cumulative working time as a situational variable as well as environmental and personal variables. This study provided a valuable contribution to the construction industry by offering a reliable and accurate heat strain forecasting model, enhancing the health and safety of construction workers.

Risk-based Safety Impact Assessment for Construction Projects (위험도 접근방법에 의한 건설사업 안전영향평가방안에 관한 연구)

  • Choi Hyun-Ho;Jung Pyung-Ki;Seo Jong-Won;Choi Ook
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.504-509
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    • 2004
  • Safety assessment of construction projects may be affected by various factors such as types and scale of projects, construction methods, procedure, climactic, and site conditions etc. Presently, in planning and design phases, designers are still often uncertain of their responsibilities, l3i]I information and training of safety. Therefore, designers are still failing to exploit the potential that have to eliminate and reduce risks on site. In this study, the concepts of safety impact assessment is introduced in order to derive the performing design for safety in design phase. For this purpose, a framework for safety impact assessment model using risk-based approach for construction projects is suggested. The suggested model includes of information survey and scenarios, classification of safety impact factors occurred by design and construction, and quantitative estimation of magnitude and frequency. Moreover, the checklist which is enable to identify relationship between safety impact factors and design factors is developed and the methodology of safety impact assessment model using risk-based approach is also proposed.

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An Argument-based Approach to Manage Collaborative Negotiations in Software Systems Design

  • Lu, Stephen C-Y.;Jing, Nan
    • Industrial Engineering and Management Systems
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    • v.7 no.3
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    • pp.266-287
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    • 2008
  • To manage collaborative negotiation in software system design, we have built a socio-technical argument-based negotiation management approach by integrating a Socio-technical Co-construction Process (STCP) with an Argument-based Negotiation Process (ABNP). This paper reviews relevant research work and presents each step of this approach. The STCP provides rich contextual information of technical decisions and social interactions in a system design process. The ABNP provides STCP with a negotiation management and conflict resolution strategy by guiding software engineers to generate, exchange and evaluate their argument claims in negotiation activities. In addition, this paper describes a prototype system which implements this new approach using the advanced Web-based software technologies with the goal of demonstrating how to systematically enhance the negotiation management capabilities in a dynamic socio-technical framework.

Generation of 3D Design Data using Laser Scanning Data

  • Park, Joon Kyu;Lee, Keun Wang
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.39 no.5
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    • pp.343-349
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    • 2021
  • In The process from design to construction in the existing construction work was less efficient due to the contradictory approach of identifying the 3D state in the plan view and the repeated generation of surveys, floor plans, drawings. Accurate 3D design data is essential for smart construction. However, most of the existing related studies have focused on explaining the development method and main functions of equipment or improving the productivity of smart construction. Therefore, in this study, the utility of 3D design model generation for smart construction and construction survey using 3D laser scanner was evaluated. Plane and vertical road alignment were created using the specifications of the road. The generated road alignment was created as a three-dimensional corridor design using cross-sections at intervals of 20m. In addition, it was possible to create a DTM (Digital Terrain Model) using a digital map and effectively create a 3D design model for the study area through overlapping. Construction survey using a 3D laser scanner showed accuracy within 10cm as a result of the accuracy evaluation. These results proved that construction surveying using a 3D laser scanner is possible because it satisfies the acceptable accuracy of the relevant regulations modeling of target areas using 3D design and construction survey using 3D laser scanner can be a way to address shortcomings of existing GNSS (Global Navigation Satellite System) methods. And accurate 3D data will be used as essential data as basic data for smart construction.

Design and Construction of Integral Abutment Bridge (일체 구조형식 교량의 설계 및 시공기법 연구)

  • 이성우;나정우;조남훈
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1996.10a
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    • pp.121-128
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    • 1996
  • In this study design and construction technique for joint-less integral abutment for short to mid span bridges was developed. Expansion of superstructure due to thermal effect was absorbed in the flexible pile-type abutment in stead of expansion joint in the conventional bridges. Design method for pile subject to vertical and horizontal force was proposed. Backfill, approach slab and details of its connection joint with pavement was also proposed.

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A Case Study on the Stability Evaluation of Piles for Negative Skin Eviction by the LRFD Approach (LRFD설계법에 의한 부마찰력이 작용하는 말뚝의 안정성 평가 사례 연구)

  • Cho Chun-Whan;Kim Woong-Kyu;Lee Woo-Chel
    • Journal of the Korean Geotechnical Society
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    • v.21 no.5
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    • pp.123-131
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    • 2005
  • Recently, construction activities in reclaimed onshore areas increase in our country In this case, the stability evaluation of the piles for negative skin friction is an important factor for the design of pile foundation in soft grounds. Nevertheless, the design of piles for negative skin friction (or downdrag forces) is probably poorly understood by many geotechnical engineers. It is mainly because only the bearing capacity aspect is taken into account for the downdrag evaluation of piles in most of design specifications. However, the problems fur negative skin friction of piles are mostly related with settlement rather than bearing capacity Meanwhile, LRFD (Load Resistance Factor Design) approach considers both ultimate limit state in terms of bearing capacity and serviceability limit state in terms of settlements. This paper proposes LRFD approach for the downdrag evaluation of piles and compares this approach to traditional design approach. And also a case history is analyzed. Through the analysis some suggestions to solve the problems for the design of piles for negative skin friction are suggested.

Comparing Traditionally Designed Restaurants in Korea and China with Emphasis on Their Traditional Design Elements (한·중 전통식 레스토랑에의 전통성 표현방법 비교)

  • Peng, Si-Si;Shin, Kyung-Joo
    • Korean Institute of Interior Design Journal
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    • v.22 no.2
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    • pp.31-38
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    • 2013
  • In this study, we selected 12 typical traditional restaurants in Korea and China and analyzed their application of traditional design approach. Through this analysis, we tried to explore similarities and differences of Korean restaurants and Chinese restaurants in order to determine the preferable way to express their own traditional design. We categorized traditional design approach as cultural elements, designing method, coloring and materials. The results are as follows: First, following a tradition and interpreting a tradition are considered as compelling design methods to express traditional culture. However, when combining a traditional and a modern design approach, it is important to either strongly emphasize traditional design elements or use small number of traditional design elements as focal points in modern design restaurants. Second, when designing a traditional restaurant using modern design elements with traditional focal points, it is more desirable to follow and/or to interpret a traditional elements, rather than experimenting an excessively unconventional design. Moreover, the design elements of exterior of a restaurant shows the identity of the restaurant. Therefore, using traditional elements in the exterior helps recognizing the traditional characteristics and culture. On the other hands, for the interior of the restaurant, it is better to use modern design method and materials for the practical reasons, such as construction cost reduction and ease of construction. We also discovered that it is more effective to use traditional elements to the pattern and color. The results of this study will set a foundation for further research of developing a design guideline for traditional restaurants.