摘要
为了研究纤维增强复合材料(FRP)约束钢筋混凝土(RC)空心截面桥墩的抗震性能,对水平单向和双向荷载作用下,剪跨比分别为4和8的CFRP约束RC矩形空心墩进行拟静力试验。分析不同试件的破坏形态、滞回曲线、水平力和位移延性。结果表明:通过CFRP布环包约束试验空心墩的塑性铰区,可降低墩柱的破坏位置、减轻损伤程度,并改变剪跨比较小墩柱的破坏形态;明显改善水平双向荷载作用下剪跨比较大矩形空心墩的滞回性能和延性,但是对水平力的提高小于20%。
In order to study seismic performance of FRP confined RC hollow section bridge pier, quasi-static test was carried out for CFRP confined RC rectangular hollow section bridge pier with shear-span ration of 4 and 8 under horizontal unidirectional and bidirectional loads. Failure mode, hysteretic curves, lateral force and displacement of tested pier columns were analyzed respectively. The results show that through confining plastic hinge region of tested hollow bridge pier by CFRP, the failure location and damage degree are reduced, and the failure mode of tested bridge piers with lower shear-span ratio is changed ; the hysteretic performance and ductility of tested bridge piers with bigger shear-span ratio are improved, however, horizontal force is only increased by less than 20%.
出处
《工业建筑》
CSCD
北大核心
2013年第6期27-31,共5页
Industrial Construction
基金
国家自然科学基金项目(50908005
50938006)
国家重点基础研究发展计划项目(2011CB013602)
关键词
桥墩
碳纤维复合材料
拟静力试验
抗震性能
空心截面
bridge pier
carbon fiber reinforced polymer
quasi-static test
seismic performance
hollow cross section
