Crack-damage mitigation of RC one-way slabs with a strain-hardening cement-based composite layer
Crack-damage mitigation of RC one-way slabs with a strain-hardening cement-based composite layer
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DOI：
10.1680/macr.2011.63.7.493
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发表时间：
2011-07
影响因子：
2.7
通讯作者：
H. Yun;K. Rokugo;T. Izuka;S. Lim
中科院分区：
文献类型：
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作者：
H. Yun;K. Rokugo;T. Izuka;S. Lim
为了减少钢筋混凝土构件的裂缝，提高钢筋混凝土构件的耐久性，提出了用应变硬化水泥基复合材料代替单向板受拉底部的部分混凝土的方法。具体地说，本文探索了一种膨胀型SHC在结构中的应用，以减轻RC受弯构件的裂缝损伤。介绍了8块钢筋混凝土简支板的试验结果。研究了SHCC型式和SHCC层厚度对单向板的初裂荷载、极限抗弯荷载、裂缝宽度和间距以及荷载-挠度关系的影响。结果表明，在楼板底部设置SHCC层显著提高了板的初裂荷载、屈服荷载和极限荷载，而在SHCC板中掺入膨胀剂显著影响了含SHCC层的单向板的初裂荷载。裂纹宽度和间距明显减小。
This paper describes a method to replace part of the concrete at the tensile bottom of one-way slabs with strain-hardening cement-based composite (SHCC) in order to mitigate cracking and improve the durability of the reinforced concrete (RC) members. Specifically, this paper explores the structural application of an expansive SHCC to mitigate crack damage in RC flexural members. The results of tests on eight simply supported RC slabs are described. The effects of the type of SHCC used and the SHCC layer thickness on the first-crack load, ultimate flexural load, crack width and spacing, and the load–deflection relationship of one-way slabs are investigated. The results indicate that the use of SHCC layers at the bottom of the slabs significantly increases the initial crack load, yield load and ultimate load, and the use of an expansive admixture in the SHCC material significantly affects the initial crack load of one-way slabs with an SHCC layer. Considerable reduction in the crack width and spacing was ob...