Kołodziejczyk Ewelina, Waśniewski Tomasz
Department of Concrete Structures, Lodz University of Technology, Politechniki 6, 93-590 Łódź, Poland.
Materials (Basel). 2021 Sep 27;14(19):5614. doi: 10.3390/ma14195614.
This research study aimed to investigate the effect of the lightweight aggregate concrete and steel reinforcement interaction on the behaviour of continuous beams compared to the normal concrete of the same strength. This paper presents six full-scale, double-span beams with a rectangular cross-section made of both lightweight and normal concrete. The study confirmed that beams made of lightweight aggregate concrete achieve comparable flexural capacities to those made of NWC but their deformability and ductility are lower. Although the redistribution of internal forces depends mainly on the longitudinal reinforcement ratio, the influence of ultimate compressive strains of concrete is also noticeable. The ultimate compressive strains in LWAC are generally lower than in NWC. The lower rotational capacity of LWAC results in smaller degrees of moment redistribution in beams made of this concrete compared to normal concrete beams.
本研究旨在探究轻骨料混凝土与钢筋相互作用对连续梁性能的影响，并与相同强度的普通混凝土进行比较。本文介绍了六根全尺寸、双跨、矩形截面的梁，分别由轻混凝土和普通混凝土制成。研究证实，轻骨料混凝土梁的抗弯能力与普通混凝土梁相当，但其变形能力和延性较低。虽然内力重分布主要取决于纵向配筋率，但混凝土极限压应变的影响也很显著。轻骨料混凝土的极限压应变通常低于普通混凝土。与普通混凝土梁相比，轻骨料混凝土较低的转动能力导致该混凝土梁的弯矩重分布程度较小。
