Automatic Estimation System of Building Frames with Integrated Structural Design Information (AutoES)
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RESEARCH PAPER
Automatic Estimation System of Building Frames with Integrated Structural Design Information (AutoES) Doyeong Kim1 · Chaeyeon Lim2 · Yue Liu1 · Sunkuk Kim1 Received: 25 April 2018 / Accepted: 24 August 2019 © Shiraz University 2019
Abstract Construction project participants seek to accurately determine construction costs as soon as a design is completed. However, it may take a minimum of several weeks for cost estimation after the structural design and drawings are completed. Manual quantity surveying is time-consuming and requires significant experience and time. Even if computerized software is used, it is time-consuming to enter structural design information into the estimation software. In addition, the estimated quantity may result in inaccurate cost owing to drawing errors or quantity surveyors’ mistake, and it is not the exact quantity to be put into actual construction, which can cause numerous problems in the construction phase. If the information can be automatically received for estimation, the exact quantity for construction can be estimated without omission or errors. To estimate the exact quantity after structural analysis and design of building projects, this study proposes an automatic estimation system of building frames with integrated structural design information (AutoES). Using the algorithms of AutoES, the task of estimation can be accomplished with an exact bill of quantities including a bar bending schedule within 1 week. Keywords Automatic estimation · Special order · Structural design · Minimization algorithm · Integrated project delivery
1 Introduction Project participants such as clients, architects, structural engineers and contractors seek to determine accurate construction costs as soon as a design is completed. However, it takes at least a few weeks for the construction cost to be estimated from the structural design and drawings, although this may vary according to the size of the projects (Kunwon Engineering 2009; Halpin and Senior 2011). Currently, in * Sunkuk Kim [email protected] Doyeong Kim [email protected] Chaeyeon Lim [email protected] Yue Liu [email protected] 1
Department of Architectural Engineering, Kyung Hee University, 1732 Deogyeong‑daero, Yongin‑si, Gyeonggi‑do 17104, Republic of Korea
Korea Institute of Civil Engineering and Building Technology, 283 Goyang‑daero, Ilsanseo‑gu, Goyang‑si, Gyeonggi‑do 10223, Republic of Korea
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Korea, when the structural analysis for a building is completed by a structural engineer, the structural engineer or subcontractor prepares detailed structural drawings. Subsequently, the estimation subcontractors take off the quantity of structural resources such as concrete, rebar and form, and prepare a bill of quantity based on the estimated quantity. Here, unlike the actual quantity, which is calculated according to specifications, codes or regulations including the length and location of rebar lapping, bending margin and anchoring, the estimated quantity refers to the quantity roughly estimated acco
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