Bacinskas Darius, Rumsys Deividas, Kaklauskas Gintaris
Department of Reinforced Concrete Structures and Geotechnical Engineering, Faculty of Civil Engineering, Vilnius Gediminas Technical University-Vilnius TECH, 10223 Vilnius, Lithuania.
Materials (Basel). 2022 Jan 27;15(3):1005. doi: 10.3390/ma15031005.
In the modern construction industry, lightweight aggregate concrete (LWAC) is often used to produce load-bearing structural members. LWAC can be up to 40% lighter by volume than normal strength concrete. However, the lack of adequate numerical models often limits the practical application of innovative building materials such as lightweight concrete in real projects. The present study conducted a comparative numerical deformation analysis of a full-scale bridge deck slab and girder. Using the physical model proposed by the authors and the finite element software ATENA, the deformations of full-scale lightweight and traditional reinforced concrete elements under the short-term effects of permanent and variable loads were compared. Depending on the safety and serviceability limit requirements, it was found that the amount of longitudinal reinforcement in lightweight reinforced concrete elements could be reduced compared with that in standard reinforced concrete elements with the same parameters. The results of the numerical analysis showed that the deformation analysis model proposed by the authors could serve as an alternative tool for the design of lightweight concrete flexural members with the selection of optimum geometric and reinforcement parameters limited by the stiffness condition.
在现代建筑行业中，轻质骨料混凝土（LWAC）常被用于生产承重结构构件。按体积计算，LWAC比普通强度混凝土轻达40%。然而，缺乏足够的数值模型常常限制了诸如轻质混凝土这类创新建筑材料在实际工程中的应用。本研究对一座全尺寸桥面板和梁进行了对比数值变形分析。利用作者提出的物理模型和有限元软件ATENA，比较了全尺寸轻质和传统钢筋混凝土构件在永久荷载和可变荷载短期作用下的变形情况。根据安全和适用性极限要求发现，与具有相同参数的标准钢筋混凝土构件相比，轻质钢筋混凝土构件中的纵向钢筋用量可以减少。数值分析结果表明，作者提出的变形分析模型可作为一种替代工具，用于设计轻质混凝土受弯构件，选择受刚度条件限制的最佳几何和配筋参数。
