###### 1 Introduction
In addition, the highest shear strength and stiffness can be obtained by using the principal orientation of CFRP laminates along the direction of the tension fields. [PERSON] et al. [26] investigated the strengthening effects of externally bonded CFRP on axially compressed square hollow sections (SHSs) of cold-formed G450 steel. They concluded that the application of CFRP to slender sections delays local buckling and subsequently results in significant increases in elastic buckling stress, axial capacity, and the strength-to-weight ratio of the compression members. The strengthening effects of CFRP for thin metallic cylindrical shells were investigated by other researchers. [PERSON] et al. [27; 28] numerically analyzed the impact of the buckling capacity of thin metallic shells using CFRP sheets under two loading conditions: uniform internal pressure accompanied by an axial load and axial loads with geometric imperfections. They found that thin metal cylindrical shell structures are susceptible to an elasto-plastic instability failure at the base boundary, known as EFB, and presented a method to strengthen cylindrical shells against EFB, with a small amount of FRP used at a critical location. The results showed that FRP could eliminate the EFB and could increase the buckling strength. [PERSON] and [PERSON] [29] also used finite element analysis to investigate the strengthening effects of FRP for steel thin-walled cylindrical shells against EFB under the simultaneous loading of axial compression and high internal pressure. They also surveyed the effect of the FRP location on the capacity of strengthened tanks. The results indicated that locating FRP in the area of the EFB occurrence, which is positioned near the base, can lead to the best strengthening result. [PERSON] and [PERSON] [30] presented a novel method of strengthening thin-walled steel cylindrical shells against buckling during axial compression by coating CFRPs on both sides. They discussed the effects of reinforcement and the angle of fiber orientation on the buckling strength and buckling modes of thin-walled shells using three kinds of analytical procedures: the conventional linear eigenvalue buckling analysis, the reduced stiffness buckling analysis, and the fully nonlinear numerical experiments. They concluded that the buckling load-carrying capacity of thin cylindrical shells increases with CFRP reinforcement when analyzed with linear and RS analyses. The load-carrying capacity before buckling of thin cylindrical shells increased, depending on the thickness of the CFRP reinforcement, by up to 70% with a 2 mm thickness and 100% with a 4 mm thickness. This increasing amount varied according to the angle of the fiber orientation. [PERSON] et al. [31] experimentally investigated the strengthening effects of circumferential CFRP for steel cylinders under axial compression. The results showed that circumferential CFRP strengthening significantly improved the carrying capacity and ductility capacity regarding axisymmetric plastic buckling. [PERSON] and [PERSON] [32] numerically studied the strengthening effects of CFRP in various types of steel cylindrical storage tanks subjected to internal pressure under a bending shear load. They concluded that CFRP strengthening can increase the ultimate strength of steel storage tanks and the increasing levels depend on the ratio of the tank's radius to the tank's thickness, and the ratio of the height of the tanks to the tank's radius. If the first ratios were lower and the second ratios were higher, the strengthening by the CFRP layer was remarkably effective. A general conclusion from the literature is that there are almost no studies concerning the strengthening effects of CFRP for TSTs subjected to internal pressure under dynamic loads. Experiments with full-scale TSTs under dynamic loads are impossible because of the complication and limitation of the capacity of the shaking table machine.