部分预制装配型钢混凝土构件斜截面抗剪承载能力试验研究

EXPERIMENTAL STUDY ON THE OBLIQUE SECTION SHEAR CAPACITY OF PARTIALLY PREFABRICATED STEEL REINFORCED CONCRETE(PPSRC) MEMBERS

为建立部分预制装配型钢混凝土(PPSRC)构件的抗剪承载力计算公式,该文设计并进行了7个试件的静力加载试验,考虑了剪跨比、现浇混凝土强度和截面形式三个变化参数对PPSRC构件抗剪性能的影响。通过分析试件的破坏过程、剪力-位移曲线和剪力-应变曲线,对PPSRC构件的破坏机理和抗剪承载力进行研究。基于试验结果,分析了预制装配型钢混凝土构件抗剪承载力的主要影响因素,依据叠加原理提出了部分预制装配型钢混凝土构件斜截面抗剪承载力计算公式。试验结果表明:部分预制装配型钢混凝土构件斜截面破坏形态有斜压破坏和剪压破坏两种形式,预制混凝土和现浇混凝土的协同工作良好;提出的抗剪承载力计算公式可为部分预制装配型钢混凝土构件的设计提供一定的基础。

To study the shear capacity of partially prefabricated steel reinforced concrete (PPSRC) members, static loading tests of seven PPSRC specimens were designed and carried out in this study. The effects of the shear span ratio, the strength of cast-in-place inner concrete, and the section shape on the shear behavior of the PPSRC members were investigated. Furthermore, the failure mechanism and shear capacity of PPSRC members were studied by analyzing the failure progress and the curves of shear force versus both displacement and strain. According to the test results, the main factors affecting the shear capacity of PPSRC members were analyzed, and the oblique section shear capacities of PPSRC members were proposed using the superposition method. The experimental results showed that the failure patterns of the oblique section of the PPSRC members included diagonal compression failure and shear compression failure. Moreover, prefabricated concrete and cast-in-place inner concrete of members combined completely. The formula for calculating the shear capacity lays a solid foundation for the design of PPSRC members.