FRP筋高韧性纤维混凝土复合结构抗震性能研究进展

高韧性纤维混凝土(ECC)具有优异的韧性、卓越的耗散能力及裂缝无害化分布的特点,在结构抗震中有极其优良的性能;FRP筋强度高,耐腐蚀性好。当两者结合起来使用时不仅克服了普通混凝土的不足,还能满足结构耐久性和特殊性能的要求。介绍了FRP筋与ECC之间的粘结工作机制,及其组成构件和结构的抗震性能。国内外研究表明,在抗震结构中使用FRP筋ECC构件,可以减少残余变形,提供相对大的弹性变形的能力。最后简要概述了针对FRP筋ECC复合结构抗震性能评价的综合性能指标法,提出了还需进一步研究完善的方向。

REVIEW ON SEISMIC PERFORMANCE OF FRP REINFORCED ENGINEERED CEMENTITIOUS COMPOSITE (ECC) FLEXURAL MEMBERS AND STRUCTURES

Engineered Cementitious Composite (ECC) has excellent toughness,dissipation capacity and distribution of multiple cracking.Application of ECC can improve seismic ability of structures.Fiber reinforced polymer bars have the advantages of high tensile strength,lightweight and non-corrosive.The use of FRP reinforcement in combination with engineered cementitious composites (ECC) provides structural composite members with relatively large elastic deflection capacity and bearing capacity.The interfacial bond characteristics of the combination between FRP bars with ECC and the seismic performance of its structures are introduced.The results show that interaction of FRP bars and ECC matrix with ductile stress-strain behavior in tension results in nonlinear elastic flexural response characteristics with stable hysteretic behavior,small residual deformation.Finally the integrated performance index for evaluating the seismic performance of FRP bars combination with ECC structures are summarized,and the need for further research is proposed.