Method for obtaining stay cable tension calculation parameter K value

The invention relates to a method for obtaining a stay cable tension calculation parameter K value, and the method comprises the steps that: a stay cable is tensioned to a preset cable tension T1 state, and the fundamental frequency f1 of the stay cable in the state is measured; the stay cable is tensioned again with the cable length as the control standard, the cable length variable quantity is delta L, and the cable tension variable quantity delta T is obtained through calculation according to delta L and T1; the fundamental frequency f2 of the stay cable is measured after the stay cable istensioned again; a parameter K value is calculated according to a formula shown in the description. According to the method, the stay cable is tensioned twice by taking the tensioning force and the cable length as control standards, the cable tension variation corresponding to the cable length variation and the fundamental frequency of the stay cable tensioned twice are obtained, then the parameter K value is calculated,