Mechanical Properties of Grouting Sleeves and Prefabricated Components in Actual Engineering of Prefabricated Shear Wall Structures
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摘要: 实际工程中装配式剪力墙结构的典型构件,包括灌浆套筒、含拼缝混凝土叠合板、叠合板-预制剪力墙节点等。为研究其力学性能,对连接预制剪力墙纵向钢筋的灌浆套筒开展工业CT扫描和拉拔试验,发现实际施工中,上下钢筋难以对中,但灌浆套筒的拉拔性能仍满足要求;对含拼缝混凝土叠合板开展静力单调加载试验,叠合板均表现出了良好的弯曲延性,抗弯承载力试验值与计算值符合较好;对节点试件进行低周往复荷载试验,发现试件的荷载-挠度骨架曲线呈倒S形,试件延性和耗能能力较好。表明三种构件的承载力和损伤模式均符合设计要求。Abstract: In this paper, experimental studies were conducted on the mechanical properties of typical components of a practical prefabricated shear wall structure, including grouting sleeves, laminated reinforced concrete slabs containing joints, and joints between laminated slabs and prefabricated reinforced concrete shear walls. Industrial computerized tomography (CT) and pull-out tests were conducted on the grouting sleeves connecting the vertical rebars of the upper and lower prefabricated shear walls. It was found that the rebars were generally difficult to align in actual construction. However, the pull-out properties of grouting sleeves met the requirements. Static loading tests were conducted on the slabs. Both slab specimens showed good flexural ductility, and their experimental and calculated bearing capacity values were in good agreement. Quasi-static cyclic tests were conducted on the joints. The load-deflection skeleton curves showed an inverted S-shape, indicating good ductility and energy dissipation capacity. The bearing capacities and failure modes of all three types of components met the design requirements.
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Key words:
- prefabricated shear wall /
- grouting sleeve /
- industrial CT /
- defect /
- mechanical performance
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