Experimental study on flexural behaviour of reinforced reactive powder concrete pole
Experimental study on flexural behaviour of reinforced reactive powder concrete pole
复制标题
钢筋活性粉末混凝土电杆弯曲性能试验研究
DOI：
10.1016/j.conbuildmat.2021.125399
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发表时间：
2021-11-01
影响因子：
7.4
通讯作者：
Song，Yifeng
中科院分区：
文献类型：
--
作者：
Ju，Yanzhong;Zhao，Jian;Song，Yifeng
为探讨高抗压强度、高抗压、高拉伸应变的活性粉末混凝土(RPC)用于混凝土电杆的可行性，以及RPC电杆与普通混凝土(NC)电杆的区别，按相同规格设计和制造了4根RPC电杆和3根NC电杆。通过弯曲荷载试验，分析了RPC和NC杆的破坏模式、裂缝分布、截面应变分布、变形性能、开裂弯矩和抗弯强度。结果表明，在所有荷载水平下，RPC杆的最大裂缝宽度均显著小于NC杆。RPC杆的开裂弯矩比NC杆提高27.3%~37.0%，抗弯强度比NC杆提高18.7%~45.4%。提出了考虑钢纤维影响的RPC杆开裂弯矩的计算方法，以及考虑RPC拉力对拉伸区贡献的RPC杆抗弯承载力计算公式。
To investigate the feasibility of using reactive powder concrete (RPC), with high compressive strength, compression and tensile strain, for concrete poles, and to study differences between RPC poles and normal concrete (NC) poles, four RPC poles and three NC poles were designed and manufactured with the same specifications. The failure mode, crack distribution, cross-section strain distribution, deformation performance, cracking moment and flexural strength of the RPC and NC poles were analysed through flexural load tests. The results indicated that the maximum crack width of RPC poles under all levels of loads was significantly smaller than that of NC poles. The cracking moment of RPC poles increases by 27.3%–37.0%, and the flexural strength of the RPC pole increased by 18.7–45.4% compared with those of NC pole. The calculation method for the cracking moment of RPC poles considering the influence of steel fibres, and the calculation formula for the flexural capacity of RPC poles considering the contribution of the tensile force of the RPC in the tensile zone are developed.