Experimental research on mechanical behavior of composite beams #br#
with precast slabs and hybrid fiber ECC under negative momen
Fan Jiansheng1 Liu Rurui1 Zhang Jun1 Yang Song2 Ai Zubin3 Chen fan3
1. Key Laboratory of Civil Engineering Safety and Durability of the Ministry of Education, Tsinghua University, Beijing 100084, China;
2. School of Civil Engineering, Tsinghua University, Beijing 100084, China; 3. Power China Road Bridge Group Co., Ltd.,Beijing 100084, China
Abstract：A new type of steel-concrete-ECC composite bridge structure is proposed with a hybrid fiber ECC material. The new structure can replace other complicated construction measures in the steel-concrete continuous composite beams under negative moment to improve cracking resistance. Experiments were conducted on 2 steel-concrete-ECC composite beams with precast slabs and 1 steel-concrete composite beam with precast slabs under static monotonic loading. The discussion of bending resistance capacity, flexural rigidity and cracking properties demonstrates the feasibility and advantages of hybrid fiber ECC applied to steel-concrete composite beams. The research results show that the bending resistance capacity and flexural rigidity of steel-concrete-ECC composite beam are higher than that of steel-concrete beam when the reinforcement ratio is same. Compared with the steel-concrete beam, steel-concrete-ECC beam can better control the number of cracks and the crack width. The napping treatment is applied to the interface between concrete and ECC, and the mechanical behavior of the interface is good with no slippage damage. Based on the experimental data and formula from codes, the model for calculating the crack width is put forward. The calculation results from the proposed model are in good agreement with test data.
樊健生 刘入瑞 张君 杨松 艾祖斌 陈钒. 采用混杂纤维ECC的叠合板#br#
组合梁负弯矩受力性能试验研究[J]. 土木工程学报, 2021, 54(4): 57-67.
Fan Jiansheng Liu Rurui Zhang Jun Yang Song Ai Zubin Chen fan. Experimental research on mechanical behavior of composite beams #br#
with precast slabs and hybrid fiber ECC under negative momen. 土木工程学报, 2021, 54(4): 57-67.
