预应力高强混凝土管桩-承台组合体受力性能

 对5 个预制桩身与承台组合体试件进行低周反复试验, 分析构件的破坏形态、承载力及延性、锚固钢筋的受力, 研究预制桩身与承台锚固钢筋的不同锚固形式对试件受力性能的影响。结果表明:通过连接板焊接锚固钢筋的试件, 倾角锚固钢筋能延缓试件裂缝的发展, 提高试件的承载能力;在桩身内安放钢筋笼并深入承台的锚固钢筋可明显改善管桩-承台组合体试件的整体性, 提高组合体试件的承载能力、延性, 改善组合体试件的变形能力, 且斜角锚固钢筋试件的承载能力优于直角试件。

Mechanical properties of prestressed high-intensity concrete pile and pile caps combined

5 specimens of prefabricated pile combined with pile caps are tested under low cycle reciprocating loading. The failure patterns, the bearing capacity and the ductility, the forces in anchoring reinforcing bars, as well as the influence of different forms of the precast pile and pile cap anchoring reinforcing bars on the mechanical properties of the specimen are studied. It is shown that by anchoring reinforced connecting plate welded specimens, the inclined anchoring reinforcing bars can play a role in delaying the growth of cracks, increasing the bearing capacity of the specimen. The specimens with the pile body and the anchoring reinforcing bars can significantly improve the integrity of the pile cap assembly of the specimen and increase the bearing capacity, the ductility, and the deformation ability, and the bearing capacity of the anchoring reinforcing bars of oblique angle is better than that of the rectangular specimens.