STRUCTURAL SAFETY INDICES FOR CONCRETE BEAMS PRESTRESSED WITH FRP. TENDONS

摘要：

One of the main concerns in the design of concrete beams prestressed with FRP tendons is the lack of ductility due to the elastic behavior of FRP tendons up to failure. Therefore, the conventional ductility index that describes the inelastic deformation capacity is invalidated in evaluating the performance of concrete beams prestressed with FRP tendons. In this paper, after a brief review of the existing indices currently used in the design of concrete beams with steel or FRP bars, a new definition of structural safety index (X-factor) for prestressed concrete beams is proposed.The new index is defined as combination of a ductility index, a deformability index and a strength index. It appears to be a suitable measurement of structural performance of concrete beams prestressed with either FRP tendons or steel tendons.

关键词： Ductility Deformability Structural safety index FRP Prestressed concrete beam

作者: Wei-Chen Xue Ren-Guang Zheng Shu-Lu Zhang Tian-Qi Yu Xiao-Hui Wang

作者单位: Department of Building Engineering, Tongji University, Shanghai 200092, P.R. China

会议类型: 国际会议

会议名称: 第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)

会议地点: 长沙

会议语种:英文

页码: 799-804

在线出版日期: 2008-10-19（万方平台首次上网日期，不代表论文的发表时间）