摘要
目的为进一步研究FRP(纤维复合材料)加固SRHC(钢骨高强混凝土)受弯构件的受力性能,对其在对称集中荷载作用下的整个受力过程进行分折.方法基于平截面假定的有限条带法,根据现有加固理论及相关技术规程编制了加固结构抗弯承载力计算程序.结果利用该程序计算得到弯矩-曲率、荷载-变形的关系曲线,以及混凝土强度、含FRP率对荷载-变形的影响曲线.当外荷载为极限荷载的14%左右时,受弯构件受拉区混凝土开裂,在相同变形条件下,FRP加固SRHC受弯构件的承载能力随着FRP层数的增加而增加,但超过3层以后,承载能力的提高幅度有所降低.结论FRP加固SRHC结构具有较好的延性.
To investigate further the bearing capacity of flexural members of FRP(Fiber Reinforced Polymer) SRHC(steel-reinforced high-strength concrete) under symmetric monotonic loading, a full range nonlinear analysis is made. Flexural capacity computing program of FRP-Reinforced structures is put out based on structure reinforcing theory and correlative rules through the finite ribbon method based on flat section assumption. By computation, the moment curvature and load-deformation relationships are obtained, as well as those among concrete strength, volumetric percentage of FRP, load and deformation of a flexural member. The results indicate that a concrete member cracks in tensional area as the external load comes to 14 % of its ultimate load or so, however, on the same deformation condition, the bearing capacity of the flexural members of FRP steel reinforced high-strength concrete increase obviously with the increasing volumetric percentage of FRP, but after more than three layers, the bearing capacity was not increased obviously. The ductility of flexural members of FRP reinforced SRHC was good.
出处
《沈阳建筑大学学报(自然科学版)》
EI
CAS
2008年第2期217-220,共4页
Journal of Shenyang Jianzhu University:Natural Science
基金
教育部博士学科点专项科研基金资助项目(20050145012)
辽宁省自然科学基金资助项目(20052019)
辽宁省重点实验室基金(JG-200601)