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Important Factors for Construction Project cost estimating Using ANN

Journal of Civil Engineering and Architecture 2013年第1期7卷 90-97页

作者： Nabil Ibrahim El Sawalhi Faculty of Engineering Islamic University Gaza 00972 Palestine

cost estimation has its proven importance as one of essential factors for project success. The aim of this research is to predict the early project cost using neural network. Early project cost represents a key component in business unit decisions. The most important factors influencing on the parametric cost estimation in construction building projects in Gaza Strip were defined and investigated. A questionnaire survey and relative index ranking technique were used to conclude the most important factors. Fourteen most effective factors were identified. One hundred and six case studies from real executed construction project in Gaza Strip were collected for training and testing the model. The cases were prepared to be used in cost estimate neural networks model. Eighty percent of case studies were used to train and test the model. The remaining 20% was used for model verification. The results revealed the ability to the model to predict cost estimate to an acceptable degree of accuracy. The minimum squares error with 0.005 in training stage and 0.021 in testing stage were recorded.

关键词： cost estimating parameter modeling neural networks.

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Streamlining Takeoff and estimating with BIM:A Case Study of a Construction cost estimating Course

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Journal of Civil Engineering and Architecture 2021年第1期15卷 35-41页

作者： Yilei Huang Department of Construction&Operations Management South Dakota State UniversityBrookingsSD 57007USA

Since the construction industry has been adopting Building Information Modeling(BIM)as the standard practice for design,engineering,and fabrication in the recent decade,many Construction Management(CM)programs at *** have started to introduce BIM for cost estimating in their *** considered as the fifth dimension beyond 3D and schedule,BIM for cost estimating in many cases is still used merely as an alternative model-based quantity takeoff method to the traditional plan-based *** disconnection between automated quantity takeoff and cost estimating,however,still exists,and the benefits of the BIM process in a project life cycle can not be fully understood by CM students without realizing its impact in the preconstruction *** bridge these gaps in a CM curriculum,an Advanced cost estimating course for CM programs has been developed that focuses on integrating BIM in both the takeoff and estimating *** new course streamlines the connection between model-based quantity takeoff and cost estimating with the help of a combination of multiple construction software *** the integration between the software,quantity data from a BIM model can be seamlessly transferred to a construction cost database for bid pricing and *** paper presents the development of the new Advanced cost estimating course as a case study,including its objectives,layout,and assessment methods,and provides empirical and valuable insights on how to integrate BIM in a cost estimating course for a CM curriculum.

关键词： Quantity takeoff cost estimating BIM CM education

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cost Estimate and Input Energy of Floor Systems in Low Seismic Regions

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Computers, Materials & Continua 2022年第5期71卷 2159-2173页

作者： Sayed Mahmoud Alaa Salman Department of Civil and Construction Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam 31441Kingdom of Saudi Arabia

Reinforced concrete(RC)as a material is most commonly used for buildings *** floor systems are available following the structural and architectural *** current research study provides cost and input energy comparisons of RC office buildings of different floor *** solid,ribbed,flat plate and flat slab systems are considered in the *** models in three-dimensional using extended threedimensional analysis of building systems(ETABS)and in two-dimensional using slab analysis by the finite element(SAFE)are developed for analysis *** and design using both software packages and manual calculations are employed to obtain the optimum sections and reinforcements to fit cities of low seismic intensities for all the considered building *** ground motion records of low peak ground acceleration(PGA)levels are used to excite the models to measure the input *** cost estimating system is adopted to categorize building components according to 12 ***,Microsoft(MS)Project is utilized to identify the construction cost and duration of each building *** study shows that floor system significantly causes changes in the input energy to *** addition,the slight increase in the PGA increases the amount of input energy particularly flat plate *** cost of the flat plate system that the flat slab system is of higher value as compared to ribbed and conventional slab *** use of drop panels increases this value as ***,the estimated cost of the ribbed slab system exceeds that of conventional system.

关键词： Uniformat system office buildings floor systems energy response cost estimating

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