摘要
为了有效补充有限的试验研究和进一步深入探讨,采用有限元方法对碳纤维布加固预应力空心板进行了非线性有限元分析。根据4块碳纤维布加固预应力空心板的实验研究结果,建立了合理的三维有限元模型。以不同的粘贴方式为参数,进行碳纤维布加固预应力空心板受弯性能非线性有限元分析。结果表明:碳纤维布总用量一定时,粘贴方式为单层四幅的预应力混凝土空心板的极限承载力和延性最为显著,碳纤维布的应变最大。计算得到的荷载挠度曲线、碳纤维布的应变曲线、开裂荷载和极限荷载都与试验结果吻合较好,可以较好地模拟碳纤维布加固预应力空心板的受弯性能。
In order to supplement experimental study and further explore,the nonlinear finite element analysis is carried out for prestressed hollow slab strengthened with CFRP.According to the 4 pieces of experimental results of prestressed concrete hollow slab strengthened with CFRP,the three-dimensional finite element model is established reasonably.By the parameter of different paste way of CFRP,the flexural property of the pre-stressed hollow slab strengthened with CFRP is analyzed.The results show that ultimate bearing capacity and ductility of prestressed concrete hollow slab with paste way of single layer and four pieces and strain of CFRP are most significant,when total amount of CFRP is invariant.The calculated the load deflection curve,CFRP strain curve,cracking load and ultimate load are close to the test results,it is feasible to simulate the flexural property of pre-stressed concrete hollow slab strengthened with CFRP.
出处
《工程抗震与加固改造》
北大核心
2014年第2期60-65,71,共7页
Earthquake Resistant Engineering and Retrofitting
关键词
预应力混凝土空心板
碳纤维布
加固
受弯性能
非线性有限元分析
pre-stressed RC hollow core slabs
carbon fiber sheet
reinforcement
flexural property
nonlinear finite element analysis
