Experimental and statistical investigation of a new concrete-composite beam with encased polymer tube wrapped by FRP
Experimental and statistical investigation of a new concrete-composite beam with encased polymer tube wrapped by FRP
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DOI：
10.1007/s11709-015-0296-8
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发表时间：
2015-06
影响因子：
3
通讯作者：
Abdelmadjid Si Salem;Souad Ait Taleb;K. Ait tahar
中科院分区：
文献类型：
--
作者：
Abdelmadjid Si Salem;Souad Ait Taleb;K. Ait tahar
提出了一种具有高力学性能的新型混凝土叠合梁。建议的设计技术包括嵌入一个圆柱形聚合物管包裹的GFRP夹克在机械无效的混凝土拉伸区。对受弯组合梁进行了试验研究，分析了组合梁的抗弯承载力及相应的破坏机理。基于试验结果，采用FORM方法进行了统计和初步的可靠度分析，以评估新梁的安全裕度。试验结果与模拟结果的对比显示了令人满意的一致性，并且与传统的钢筋混凝土梁相比，这种设计在强度和延性方面的改善是一个有希望的启示。
A new concrete-composite beam with high mechanical performances to weight ratio is developed in this study. The proposed design technique consists to embed a cylindrical polymer tube wrapped by a GFRP Jacket in the mechanically ineffective concrete tensile zone. An experimental investigation is carried out on composite beams under bending loads until failure to evaluate the flexural capacity and the corresponding failure mechanisms. Based on the experimental results, statistical and preliminary reliability analyses using the FORM method are performed to assess the safety margin of the new beam. The confrontation between test and simulation results shows a satisfactory agreement, and represents a promising revelation regarding the improvement in terms of strength and ductility of such design compared to conventional reinforced concrete beams with traditional one.