Rady Mohammed, Mahfouz Sameh Youssef, Taher Salah El-Din Fahmy
Construction and Building Engineering Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport (AASTMT), B 2401 Smart Village, Giza 12577, Egypt.
Department of Structural Engineering, Faculty of Engineering, Tanta University, Tanta 31527, Egypt.
Materials (Basel). 2022 Apr 2;15(7):2625. doi: 10.3390/ma15072625.
The structural design process is iterative and involves many design parameters. Thus, this paper presents a controlled framework for selecting the adequate structural floor system for reinforced concrete buildings and efficiently utilizing the corresponding construction materials. Optimization was performed using an evolutionary algorithm to minimize the total construction cost, considering the costs of concrete, steel reinforcement, formwork, and labor. In the problem formulation, the characteristic compressive strength of concrete was treated as a design variable because it affects the mechanical performance of concrete. The design variables included the column spacings, concrete dimensions, and steel reinforcement of different structural components. The constraints reflected the Egyptian code of practice provisions. Because the choice of the structural floor system affects the design details, three systems were considered: solid slabs, flat slabs with drop panels, and flat slabs without drop panels. Two benchmark examples were presented, and the optimal design results of the structural floor systems were compared. The solid slab system had the lowest construction cost among the three structural floor systems. Comparative diagrams were developed to investigate the distribution of construction costs of each floor system. The results revealed that an adequate choice of design variables could save up to 17% of the building's total construction cost.
结构设计过程是迭代的，涉及许多设计参数。因此，本文提出了一个可控框架，用于为钢筋混凝土建筑选择合适的结构楼盖体系，并有效利用相应的建筑材料。使用进化算法进行优化，以最小化总建造成本，其中考虑了混凝土、钢筋、模板和人工成本。在问题表述中，混凝土的特征抗压强度被视为设计变量，因为它会影响混凝土的力学性能。设计变量包括不同结构构件的柱间距、混凝土尺寸和钢筋。约束条件反映了埃及的实践规范条款。由于结构楼盖体系的选择会影响设计细节，因此考虑了三种体系：实心板、带托板的平板和不带托板的平板。给出了两个基准示例，并比较了结构楼盖体系的优化设计结果。在三种结构楼盖体系中，实心板体系的建造成本最低。绘制了对比图来研究各楼盖体系的成本分布情况。结果表明，合理选择设计变量可节省高达建筑总建造成本的17%。
