Abstract：The results of a numerical analysis and field measurement research of the performance of steel fiber reinforced concrete segments(SFRCS) in the shield tunnel of Shanghai Rail Transit Project Line 6 are presented. The objectives of this study are to investigate the mechanical behaviors of SFRCS during construction stage. The scope of the research involves：(1) the evaluation of the behaviors of the segment against the thrust forces of shield jacking；(2) the distribution of stress and strain of segment body；and(3) the distribution of stress and strain of circumferential joints of segments. According to the contacting condition between segment rings，the nonlinear finite element analyses were applied. At the same time，the field test was carried out using actual lining segments at one shield tunnel construction site. The results show that safety against the thrust forces of shield jacks，distribution of tension strain in segment body and joint meet the requirements of design and construction. No cracking has been found in segments under the construction loadings. This shows that the steel fibers provide the concrete segment an improved crack resistance. The performance of the segment has been enhanced by the addition of steel fibers，and SFRCS can be applied as a reasonable tunnel lining for subway tunnel.
