【摘要】 通过对12 m跨GRC异形内模折线形预应力筋箱梁受力性能的试验研究,测定箱梁的最大承载力,分析箱梁在各级荷载下裂缝和挠度的发展情况,及其破坏形态和破坏特点,并将试验结果与按现行规范计算的结果进行对比.结果表明:试验梁的受力性能良好,内模与梁形成统一的受力整体共同工作,当荷载达到设计破坏荷载的207%时,仍未发生破坏,有足够的安全储备;按照现行桥梁设计规范进行设计可满足工程要求.GRC薄壁筒芯是一种有发展前景的应用于小跨度桥梁的内模.更多还原

【Abstract】 Based on stress property experimental study of box beam,in which GRC abnormity internal molds are used,ultimate bearing capacity of box beam is determined,the development of crack and deflection is measured under each load step,failure form and characteristic is analyzed,and the results of the experiment are compared with the calculation results according to the present code.The experimental results show that stress property of the beam is good,internal mold and beam work together as a whole body.The beam doesn’t fail when the load reaches 207% of design failure load,and it is safe enough.It can satisfy project requirements by the current code for design of bridge structures.The GRC tube filler used as internal mold has prospect in small span bridge.更多还原