摘要
为研究压缩薄膜效应对玻璃纤维增强筋(GFRP)混凝土桥面板工作性能的影响,结合GFRP筋、钢筋混凝土板的试验成果,采用有限元法对该类结构进行非线性有限元分析,并将计算结果与试验结果进行对比。结果表明:计算结果与试验结果吻合良好,所建立的模型能够准确地反映GFRP筋混凝土板的工作性能及压缩薄膜效应;压缩薄膜效应导致结构实际承载能力大于现行设计方法的计算结果,而现行的设计方法由于忽略了该效应,严重低估了桥面板的承载能力,进而导致板内的配筋率过高;压缩薄膜效应随混凝土强度和支撑梁刚度增大而提高;冲切破坏可能为桥面板在轮胎荷载作用下的主要破坏模式,建议进行后续研究。
To investigate the influence of compressive membrane action（CMA） on the working performance of concrete deck slabs reinforced with glass fiber reinforced polymer（GFRP） bars and on the basis of the previous experimental studies of GFRP bars and reinforced concrete deck slabs,the finite element method is used to conduct the nonlinear analysis of the type of the structures and the results of the calculation and experiment are compared.The results of the analysis show that the calculation agrees fairly well with the experiment and the established models can correctly represent the working performance and the CMA of the slabs reinforced with GFRP bars.The CMA causes the actual carrying capacity of the slabs to be greater than that calculated according to the current design methods while the design methods severely underestimates the carrying capacity of the slabs owing to the negligence of the CMA,which in turn results in excessive arrangement of the bars in the slabs.The CMA increases with the increase of concrete strength and rigidity of supporting beams.The punching failure may be the major failure mode of the slabs under the action of wheel load and it is hence proposed that the related successive studies should be made.
出处
《世界桥梁》
北大核心
2011年第1期59-63,共5页
World Bridges
基金
国家自然科学基金(50908055)
广东省交通厅科技计划(2009-02-017)
东莞市科技计划(200910814049)
关键词
混凝土桥面板
GFRP
压缩薄膜效应
非线性有限元分析
有限元法
concrete deck slab
GFRP
compressive membrane action
nonlinear finite element analysis
finite element method
