Geopolymer is widely used as a supplement to cementitious composites because of its advantages of low carbon and environmental protection, and geopolymer concrete is also broadly used in practical engineering. In recent years, geopolymer concrete has attracted increasing interest owing to its superior mechanical properties, and a series of research results have been obtained. In this paper, from the preparation of geopolymer concrete, based on the characteristics that geopolymer concrete is brittle and easy to crack, the types and basic properties of fibers to enhance the toughness of concrete are analyzed, the advantages and disadvantages of different fibers used as a material to enhance the toughness of concrete are summarized, and we review the effects of type, shape, volume rate, aspect ratio, and hybrid fiber combinations on the static mechanical properties. The results indicate that fibers have significant potential to enhance the compressive strength, splitting tensile strength, flexural strength, and fracture toughness of geopolymer concrete, and the optimal fiber volume rate seems to be related to the fiber type. Whereas the effect of aspect ratio and hybrid fiber combinations on the properties of geopolymer concrete seems to be obvious. This paper reviews the influence of fiber on the basic mechanical properties of geopolymer concrete, which provides a solid foundation to promote the further development and application of the research on the toughness of fiber-reinforced geopolymer concrete and provides recommendations for future research.

The existing calculation methods of shear capacity of FRP reinforced concrete beams without web reinforcement are inconsistent in considering the factors of shear capacity, and there are different degrees of conservative calculation. Based on the experimental data of shear capacity in published literatures at home and abroad, a database with a sample size of 461 was established in this paper. The effects of six factors, such as the compressive strength of concrete, the width of the beam, the effective depth of the beam, the shear span to depth ratio, the reinforcement ratio of FRP bars and the elastic modulus of FRP bar, on shear capacity were analyzed comprehensively, and the prediction effect of each calculation method was evaluated. The results showed that the influence of each calculation method on the size effect and shear span to depth ratio was not consistent, and there were different degrees of conservative calculation, there was a good correlation between the factors and the shear capacity; among the design provisions recommended by different countries, the CSA/CAN-S806-2012 has a more accurate prediction effect, and the ACI440.1R-2015 has the most conservative prediction effect; among the calculation models provided by scholars, the prediction effect of Ahmed-2021 is more accurate, and that of Alam-2013 is the most conservative. The research results provided the certain referential value for developing the calculation method of shear capacity of FRP reinforced concrete beams without web reinforcement.