SRHSHPC梁受弯性能试验及承载力研究  

Study on flexural behavior and bearing capacity of SRHSHPC beams

作　　者：王斌[1] 周雪峰[1] 郑山锁[2] 车顺利[2] 

机构地区：[1]西安工业大学建筑工程学院,陕西西安710021 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《广西大学学报（自然科学版）》2013年第4期851-858,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50978218;51108041);陕西省教育厅专项科研项目(2010JK633;12JK0920);陕西省科技厅项目(2010K01-073)

摘　　要：为了研究型钢高强高性能混凝土(SRHSHPC)梁的正截面承载力,对7榀不同跨度、剪跨比、含钢率及混凝土强度的型钢高强高性能混凝土梁进行了抗弯试验,分析了型钢高强高性能混凝土梁的破坏机理、粘结滑移、截面应力—应变以及荷载—挠度曲线等。试验结果表明:在加载初期,梁截面高度平均应变符合平截面假定,但到后期则不能很好地符合;型钢高强高性能混凝土梁受力过程中,型钢与混凝土界面有可能成为构件破坏的薄弱区而引发构件的不同破坏形态。最后,通过引入粘结滑移影响系数和截面对称性影响系数,提出了型钢高强高性能混凝土梁正截面承载力计算公式,其计算结果和试验结果吻合较好,可为相关设计提供参考。The beating capacity of steel reinforced high strength high performance concrete （ SRHS- HPC） beams was investigated through a bending test of 7 beam specimens with various span, shear span ratio, steel ratios and concrete strength. The failure process, bond-slip characteristic, stress- strain of cross section and load-deflection curve of SRHSHPC beams were analyzed. The test results showed that the strain along height of cross section is approximately agreed with the assumption of plane cross-section in early loading stage, but not in later stage. The interface between steel and concrete may be the weak zone of SRHSHPC beams, which caused different failure modes. Finally, the bond-slip influence coefficient and the interface symmetry coefficient were introduced to establish a formula for the calculation of bearing capacity in the design of SRHSHPC beams. The comparison showed that the calculation results agreed with the test results well. The results established in this paper can provide reference for the design.

关 键 词：型钢高强高性能混凝土梁 受弯性能 粘结滑移 承载力 

分 类 号：TU398.1[建筑科学—结构工程]