碳纤维织物增强水泥砂浆板平面内抗剪性能

采用单点加载试验研究了碳纤维织物增强水泥砂浆(carbon textile reinforced mor-tar,CTRM)板的平面内抗剪性能,以碳纤维织物层数、钢纤维掺量两个因素对CTRM复合板力学性能进行研究.试验结果表明:随着织物层数的增加,试件的斜截面开裂荷载、极限荷载以及开裂前刚度和开裂后刚度都得到了明显的提高;提高钢纤维掺量可以有效提高试件的斜截面承载力,提高斜截面开裂荷载和极限荷载,并且可以有效改善碳纤维织物与水泥砂浆的界面性能,减轻织物与水泥砂浆的剥离破坏程度.最后,提出了CTRM板平面内抗剪承载力的计算方法.

Study on In-plane Shear Behavior of CTRM Plate

The one-point loading test was used to study the in-plane shear behavior of carbon textile reinforced mortar (CTRM) plate. The carbon textile layers and steel fiber content were used as the parameters to study the mechanical properties of the CTRM plate. The test results show that with the increase of the number of textile layers, the oblique section crack load, ultimate load, stiffness before cracking and stiffness after cracking of the specimens are significantly improved. Steel fiber content can effectively increase the oblique section bearing capacity, oblique section crack load and ultimate load of the specimens, and can effectively improve the interface performance between carbon textile and mortar, which can reduce the degree of peeling damage between carbon textile and mortar. Finally, a calculation method for the in-plane shear capacity of the CTRM plate is proposed.