Stolarski Adam, Zychowicz Jacek
Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 gen. Sylwestra Kaliskiego Street, 00-908 Warsaw, Poland.
Materials (Basel). 2021 Mar 27;14(7):1652. doi: 10.3390/ma14071652.
The purpose of the work is an experimental analysis of the behavior of reinforced concrete beams with a new, patented system of truss-shaped reinforcement. Experimental tests of reinforced concrete beams with conventional reinforcement and with truss-shaped, mass equivalent reinforcement, with two different values of longitudinal reinforcement ratio, were carried out. The testing results of the load-carrying capacity and displacements of beams are presented. The cracking and failure mechanism of beams with a new truss-shaped reinforcement system was also analyzed. The test results for conventionally reinforced beams and with truss-shaped reinforcement were compared. The test results show that the use of the truss reinforcement has an influence on increasing the load-carrying capacity of beams. The amount of this increase depends on the total longitudinal reinforcement ratio and reaches as much as 95% for beams with a low reinforcement ratio and 12% for beams with a higher reinforcement ratio. Based on the investigation of the cracking mechanism, it can be concluded that the failure of the beams with transverse truss-shaped reinforcement occurs with a greater number of smaller cracks, which are more evenly distributed along the length of the cracking zone, and have a shorter range over the cross-section depth, which results in their smaller opening widths. The comparative analysis shows the effectiveness of the proposed reinforcement system, justifying the high potential possibilities of its use for the reinforcement of concrete structural elements.
这项工作的目的是对采用新型专利桁架形配筋系统的钢筋混凝土梁的性能进行试验分析。对具有常规配筋以及具有桁架形、质量等效配筋且纵向配筋率有两个不同值的钢筋混凝土梁进行了试验测试。给出了梁的承载能力和位移的测试结果。还分析了具有新型桁架形配筋系统的梁的开裂和破坏机制。比较了常规配筋梁和桁架形配筋梁的测试结果。测试结果表明，使用桁架配筋对提高梁的承载能力有影响。这种提高的幅度取决于总纵向配筋率，对于配筋率低的梁可达95%，对于配筋率高的梁可达12%。基于对开裂机制的研究，可以得出结论，采用横向桁架形配筋的梁的破坏伴随着更多更小的裂缝，这些裂缝沿开裂区长度分布更均匀，且在截面深度上的范围更短，这导致其开口宽度更小。对比分析表明了所提出的配筋系统的有效性，证明了其用于混凝土结构构件配筋的高潜在可能性。
