GRF薄壁空心管混凝土梁构件的力学性能实验研究  

Experimental study on mechanical properties of GRF hollow pipe concrete beam components

作　　者：荣传新[1] 沈科伟[1] 

机构地区：[1]安徽理工大学土木建筑学院,淮南232001

出　　处：《安徽建筑工业学院学报（自然科学版）》2011年第1期13-17,共5页Journal of Anhui Institute of Architecture(Natural Science)

基　　金：安徽省优秀青年科技基金(08040106828)资助

摘　　要：通过对GRF薄壁空心管混凝土梁构件的实验研究和理论分析表明,在弹性阶段,外荷载和GRF薄壁空心管混凝土梁构件的各个部位的应变关系与弹性理论计算结果基本一致,由此可见,设计计算时采用弹性理论计算公式是合理的,梁构件的弹性极限荷载为其极限承载力的25%左右;在反复外荷载的作用下,其极限承载力可增加16%左右;当外荷载接近其极限承载力时,斜裂缝向上延伸到集中荷载作用点位置,向下延伸到纵向钢筋,并沿着纵向钢筋向支座发展,产生撕裂裂缝,直至破坏。这些可为现浇钢筋混凝土GRF薄壁空心楼板的设计计算提供参考。Through GRF hollow pipe beam components experimental and theoretical analysis,the results show that the relationships between the external load and the strain of the various parts of GRF hollow pipe concrete beam components subject to the elasticity theory in the elastic stage,indicating that the elasticity theory calculation formula is reasonable at designing.The beam components elastic limit load is about 25% of its ultimate bearing capacity.In the repeated external load,the beam ultimate bearing capacity increases 16%.When the external load closes to the ultimate bearing capacity of beams,the diagonal crack extends up to the point of concentrated load,down to the level reinforcement.GRF hollow pipe beam components produce tearing cracks to failure.The results are the references of designing and calculation of GRF hollow pipe reinforced concrete floor.

关 键 词：GRF薄壁空心管 混凝土梁构件 力学特性 实验 加载方式 

分 类 号：TU758.12[建筑科学—建筑技术科学]