Dynamic Optimization Model for Estimating In-Situ Production Quantity of PC Members to Minimize Environmental Loads

Abstract

CO2 emissions account for 80% of greenhouse gases, which lead to the largest contributions to climate change. As the problem of CO2 emission becomes more and more prominent, research on sustainable technologies to reduce CO2 emission among environmental loads is continuously being conducted. In-situ production of precast concrete members has advantages over in-plant production in reducing costs, securing equal or enhanced quality under equal conditions, and reducing CO2 emission. When applying in-situ production to real projects, it is vital to calculate the optimal quantity. This paper presents a dynamic optimization model for estimating in-situ production quantity of precast concrete members subjected to environmental loads. After defining various factors and deriving the objective function, an optimization model is developed using system dynamics. As a result of optimizing the quantity by applying it to the case project, it was confirmed that the optimal case can save 7557 t-CO2 in CO2 emissions and 6,966,000 USD in cost, which resulted in 14.58% and 10.53% for environmental loads and cost, respectively. The model developed here can be used to calculate the quantity of in-situ production quickly and easily in consideration of dynamically changing field conditions.

COD Optimization Prediction Model Based on CAWOA-ELM in Water Ecological Environment

“…Step 3: generating M chaotic sequences by substituting formula (9), and generating M chaotic variable sequences…”

“…When the value reaches 4, 8 ml/L, 2.33 g/L, the model is optimal, and the effect of COD is 83.51. In the CO 2 emissions, Lim and Kim [9] proposed dynamic optimization to evaluate the production of concrete components. Reuse kinetics to optimize related parameters, and as a result, CO 2 emission costs can be saved.…”

Analysis of CO2 Emission Reduction Effect of On‐Site Production Precast Concrete Member according to Factory Production Environment

“…Member Production Method [27]. Data for CO 2 emission calculation were obtained from 28 constructions sites, and the proposed CO 2 unit was used [28].…”

Development of an Algorithm for Crane Trajectory Distance Calculation for Erection of Precast Concrete Members

“…A large crane is required to lift heavy PC members, and PC members are installed inside the crane's working radius following a review of crane specifications and designs [20,21]. Mobile cranes are the most commonly utilized; they are a shared resource among on-site resources due to their considerable mobility and weight, and they are involved in all types of lifting operations [22][23][24].…”