In order to study the shear fatigue performance of studs used in the composite deck system of steel slab and thin CRRPC

pavement, the push-out test and flexural fatigue test were carried out. Based on the Von Mises failure criterion and the bilinear

constitutive relation，the slippage-load cycles curves and the shear capacity of studs under different load ratios and different

connection modes of interfaces were obtained from finite element analysis, static test and fatigue test of push-out model. Furthermore,

the flexural fatigue tests on full-scale composite beam were designed to investigate the shear fatigue performances of studs in

composite deck systems.  Results indicate that load ratio is one of key factors influencing the shear fatigue life, and it is

recommended that the load ratio be taken as 0.4 for the push-out fatigue test. On the other hand, the bonding effects between steel slab

and CRRPC layer is another key factor influencing the fatigue life. For the specimens with bonding effects, the equivalent fatigue life

shall be 922 thousand times at the load ratio of 0.4, while for the specimens without bonding effects, the fatigue life shall only be

169 thousand times. In addition, the control of stud spacing is an effective method to increase shear fatigue life of the composite

deck. Under the equivalent stress amplitude of Dongting bridge, fatigue failure didn’t occur in the composite beam even without the

bonding effects after 88.889 million times of fatigue loading, provided that studs were arranged to be 125mm×125mm.