To improve the calculation precision of hanger tension in engineering, the complex boundary conditions such as addition masses of tied beams and ribs at both ends of hanger, damping effect of shock pads and elastic supports are considered, some explicit relational expressions between hanger tension and the transverse vibration frequency are established based on Rayleigh theory. The expre ssions are verified by the measured construction data of the Second Yellow River Bridge in Zhengzhou on Beijing-Hong Kong Macao expressway. The results show that the expressions considered the combined boundary conditions are suited to calculate tensions of long or short hangers with high precision. And the expressions are strongly practical for their explicit forms. For the Second Yellow River Bridge in Zhengzhou, the restraint at the ends of hanger is mostly close to fixed.