玻璃钢(FRP)筋防腐混凝土是一种强度高、全方位耐腐蚀的新型工程材料,具有十分广泛的应用前景.本文先对防腐混凝土梁采用四点弯曲试验方法,对FRP筋加强混凝土梁的弯曲长期力学特性进行了试验研究与分析,得到了梁在不同荷载水平作用下的蠕变曲线.结果表明,FRP筋不仅提高了防腐混凝土梁的初始刚度和强度,且明显降低了梁的蠕变变形.最后,运用最小二乘法确定蠕变模型参数,分别建立了防腐混凝土粱和FRP筋加强防腐混凝土梁的弯曲蠕变幂律模型,为估计材料的长期力学性能提供依据,对FRP筋防腐混凝土结构设计具有重要的价值.
FRP rural resin concrete which has extensive application prospect is a kind of anti-corrosive new en-gineering material. Although it's stronger in compression than cementitious concrete, its tension behavior is weak, the reinforcement of polymer concrete beams in the tension zone with puhruded profiles made of resin and glass fibers are a good compromise between strength and stiffness. In this paper, firstly the experience has performed about the bending and creep characteristic of non-FRP reinforced furan resin concrete beam and FRP reinforced furan concrete beam, the creep curves are gained of the beams under different loads by four-point bending tests method, analysis is carried on the viscoelasticity nature, the result shows that FRP not only enhances the furan resin concrete beam's ini-tial stiffness and strength, but also obviously reduces the creep strain of the beam. Secondly the creep model varia-bles are determined through the least square method, the bending creep power law model are separately built of non-FRP reinforced furan resin concrete beam and FRP reinforced furan concrete beam,which is the basis of estimation of material's long term mechanics performance, and also has important project practical value to the FRP furan resin concrete structure design.
参考文献
| [1] | Hesham Diab;Zhishen Wu .A linear viscoelastic model for interracial long-term behavior of FRP-concrete interface[J].Composites Engi-neering,2008,4:722-730. |
| [2] | C M L Tavares;M C S Ribeiro;A J M Ferreira;R.M.Guedes .Creep behavior of FRP-reinforced polymer concrete[J].Computers & Structures,2002,57:47-51. |
| [3] | Wang Wei;Yan Shilin;Zhang Yah .Glass steel bar enhancement res-in concrete beam bending property research[J].Wuhan University of Science and Technology journal,2005,27(02):7-9. |
| [4] | Min Zhaohui;Wang Xianhuan .Asphalt concrete creep property ex-periment research[J].road transportation science and technology,2004,21(01):1-3. |
| [5] | Lu Weimin;Guo Zhongyin .Epoxy asphalt concrete creep property[J].petroleum pitch,1995,9(04):1-3. |
| [6] | 杨志刚.FRP加固圆形混凝土桥柱的轴压强度模型研究[J].玻璃钢/复合材料,2008(01):30-34. |
| [7] | 祁德庆,钱文军,薛伟辰.土木工程用FRP筋的耐久性研究进展[J].玻璃钢/复合材料,2006(02):47-50. |
| [8] | 李建辉,邓宗才,张建伟,杜修力.FRP筋混凝土结构的现状与发展[J].玻璃钢/复合材料,2005(04):51-56. |
| [9] | 薛伟辰,潘越,周德源.FRP板加固混凝土结构研究进展[J].玻璃钢/复合材料,2004(01):40-41. |
| [10] | Vineenzo Colotti;Giuseppe Spadea .Shear Strength of RC Beams with Bonded Steel or FRP Plates[J].Journal of Structural Engineering ASCE,2001,127(04):367-373. |
| [11] | B. BENMOKRANE;H. RAHMAN;P. MUKHOPADHYAYA;R. MASMOUDI;B. ZHANG;I. LORD;G. TADROS .Fiber-Optic Sensors Monitor FRP-Reinforced Bridge[J].Concrete international,2001(6):33-38. |
| [12] | Marco Arduini;Angelo Di Tommaso .Brittle Failure in FRP Plate and Sheet Bonded Beams[J].ACI Structural Journal,1997,94(04):363-370. |
| [13] | 高丹盈,李趁趁,朱海堂.纤维增强塑料筋的性能与发展[J].纤维复合材料,2002(04):37-40. |
| [14] | 王士巍,侯涤洋,董鹏.FRP管增强混凝土结构的性能研究[J].纤维复合材料,2005(02):58-60. |
| [15] | 郭恒宁.混凝土中FRP筋的粘结性能[J].纤维复合材料,2006(03):10-13. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%