型钢高强高性能混凝土梁的抗剪性能分析

为了研究型钢高强高性能混凝土梁的抗剪力学性能,对9榀不同混凝土强度等级、剪跨比和加载方式的实腹式型钢高强高性能混凝土简支梁进行了静力加载试验,分析了型钢高强高性能混凝土梁的受力过程、剪切破坏类型及抗剪承载力的影响因素.基于型钢高强高性能混凝土梁的试验研究结果,对简支梁的加载和受力过程进行了有限元模拟.有限元分析结果与试验实测相关数据的对比分析表明,采用通用有限元分析程序ANSYS对型钢混凝土构件的受力过程进行数值模拟是可行的.在此基础上,进一步分析了简支梁的抗剪机理和力学性能,同时探讨了粘结滑移对构件力学性能的影响以及型钢、钢筋和混凝土应力应变的发展分布规律.研究成果为改进型钢高强高性能混凝土梁设计计算理论和有限元分析提供了试验依据.

Analysis of Shear Performance of SRHSHPC Beams

To research the shear mechanical performance of the steel reinforced high strength and high performance concrete（SRHSHPC）,the load-bearing process,the shear failure modes and the influencing factors of shear bearing capacity of SRHSHPC beams are analyzed through the test results of 9 SRHSHPC beams,with various concrete strength grades,shear span ratios and loading patterns.Based on the test results of SRHSHPC beams,the ANSYS program is used to simulate the load-bearing process and stress change of SRHSHPC beams,and the applicability of program for SRHSHPC beams is verified by contrastive analysis of the finite element results with experimental results.The mechanical property and shear mechanism of SRHSHPC beams are analyzed and the effect of bond-slip is discussed further,the distribution of stress-strain of steel,reinforced bar and concrete are obtained by finite element analysis.The findings provides an experimental basis for improving the calculation theory and the finite element analysis of SRHSHPC beams.