Assessment the cable tension and the linetype state of cable-stayed bridge based on variable weight synthesis

作者：Wu Hua Cheng^*; Xiang Yi Qiang

来源：China Railway Science, 2006, 27(6): 42-48.

• Balanced coefficient
• Cable tension
• Linetype
• Slope coefficient
• State assessment
• Variable weight synthesis

Based on variable weight synthesis principle, a cable tension and linetype state assessment model of cable-stayed bridge was established. With the optimized restraint value of cable tension as criterion, upper and lower limit was then proposed. Algorithm of state assessment was programmed, using moderate index model to interpolate linearly, and with the application of variable weight synthesis principle and correlation of slope coefficient, according to a set of measured data, state of cable tensions and linetype were calculated. Calculation results show that with the decrease of balanced coefficient, the assessment result is a process of degradation. The more divergent variable weight is, the more severe the degradation of the bridge component assessment and the larger the curvature of curve will be. It is predicted that, for those bridge component that grade of single survey point is exactly the same, the curvature of curve is constant zero, i.e., there is no correlation between the assessment result and the balanced coefficient. Numerical simulation results show that it agrees quite well with the expectation.

• 出版日期2006
• 单位浙江大学