高墩大跨度连续刚构桥安全状态预警系统阀值设定研究

In bridge health monitoring system of early warning module, how to set a reasonable warning threshold is important to effective operation of the system. For new high-pier long span continuous rigid frame bridge health monitoring and early warning system, a method was proposed that considering vehicle load, temperature effect, residual operation stage of concrete shrinkage and creep effect and load effect on the foundation subsidence, combined with possible load combination in the bridge operation stage, and according to the rules of bearing capacity limit state and serviceability limit states of load combination coefficient of load combinations, select the most unfavorable combination, get two level warning threshold, in order to determine the bridge structure of three kinds of safety state, thus ensuring the safety of the bridge.