A modified model for predicting cyclic stress–strain relationship of fiber reinforced polymer grid reinforced engineered cementitious composites
Zhongfeng Zhu, Wenwei Wang, Shiping Yin, Jun Tian, Yuzhou Zheng, Guoqin Huang
Abstract
Abstract To verify the universality of the cycling model of carbon fiber reinforced polymer (CFRP) grid reinforced engineered cementitious composite (CFRP‐ECC) material, a complementary experiment was carried out to investigate the cycling behavior of basalt fiber reinforced polymer (BFRP) grid reinforced ECC (BFRP‐ECC) composite material using both traditional measurement and digital image correlation system. Elastic modulus, layers, and surface treatment of BFRP grid and the loading schemes were considered as the major variables in the experiment. Compared with the CFRP‐ECC, BFRP‐ECC had better ultimate and residual deformation capabilities. Test results also showed that the effective strain of the internal BFRP grid reached 80–90% of the ultimate material strain, therefore, higher loading capacity of BFRP‐ECC material was obtained. A unified model was proposed to analyze the cyclic stress–strain behavior for both BFRP‐ECC and CFRP‐ECC materials. The validation of the analysis model was verified through comparisons between the predicted values and the test results.