Department of Civil Engineering, Tongji University,Department of Civil Engineering, Tongji University,Department of Civil Engineering, Tongji University,Department of Civil Engineering, Tongji University
This paper, based on a model experiment of 1/2 reduced scale, reveals the stress mechanism of exposed steel anchor box cable tower anchorage and analyzes the effect of the prestress. The results show that the exposed steel anchor box cable tower anchorage is suitable for the cable stayed bridge of small span. In the condition of no crack occurred in the concrete tower wall, prestress does not change the distribution of the horizontal cable force between the steel anchor box and the concrete tower wall. Prestress can obviously reduce the tensile stress of concrete tower wall and then improve the performance in crack resistance. However, prestress will also reduce the ratio of utilization of steel anchor box and add the shearing force of studs.