gfrp -钢筋混凝土的受拉加劲性能

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI:10.14359/14876

H. Sooriyaarachchi, K. Pilakoutas, E. Byars

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引用次数: 19

摘要

摘要:本文对玻璃纤维增强聚合物增强混凝土(GFRP-RC)受拉构件的结构响应进行了试验研究。通过直接受拉试验单元，研究了混凝土强度、配筋率和钢筋直径对受拉加筋的影响。利用特制的内置应变片的钢筋，测量了直接拉伸试验中裂纹之间的典型应变模式，并推导了粘结应力，从而获得了模拟GFRP-RC拉伸加劲行为的信息。随着配筋率的降低和混凝土强度的增加，受拉加劲性能增加。在配筋率不变的情况下，随着钢筋直径的变化，拉伸加劲没有明显的变化。本文还讨论了在修改现有模型以表示GFRP-RC的拉伸加劲效应时可能遇到的局限性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Tension Stiffening Behavior of GFRP-Reinforced Concrete

Synopsis: This paper presents an experimental study into the structural response of Glass Fiber Reinforced Polymers Reinforced Concrete (GFRP-RC) tension members. The influence of concrete strength, reinforcement ratio and bar diameter on tension stiffening is investigated by testing elements in direct tension. Using bars specially manufactured with internal strain gauges, typical strain patterns occurring between cracks during direct tension tests were measured and bond stresses derived, thereby obtaining the information for modeling tension stiffening behavior of GFRP-RC. An increase in the tension stiffening behavior with decrease in reinforcement ratio and increase in concrete strength was observed. No appreciable change in tension stiffening was recorded with changes in bar diameter at constant reinforcement ratio. This paper also discusses the limitations that may be encountered in modifying current models to represent the tension stiffening effect of GFRP-RC.

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SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures

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