天津赤峰桥主塔施工应力监测

采用空间梁元程序,建立天津赤峰桥主塔的有限元模型.由于该主塔具有独斜塔、部分预应力钢筋混凝土结构并采用竖向预应力平衡部分塔体自重的特点,用等效荷载模拟竖向预应力进行主塔施工过程计算.在保证应力安全的基础上,设计了斜塔竖向预应力的张托顺序和应力监测方案.监测结果表明,该模型的建立为桥塔的施工监控提供了准确的数据,保证了主塔施工的顺利完成.

Construction Stress Monitoring of Main Tower on Tianjin Chifeng Bridge

Space beam program is adopted to build up the main tower model of Tianjin Chifeng Bridge.Due to the inclined tower of part prestress reinforced concrete structure with characteristics of self-weight balanced by vertical prestress,the equivalent loads are used to simulate prestress and calculate the construction process of the main tower,thus the vertical prestress tension order and the stress control method are designed in order to ensure the safety of the single inclined tower.The observation results show ...