天津津塔钢板剪力墙焊接应力监测与数值模拟

Welding stress monitoring and numerical simulation of steel plate shear wall for Tianjin Tower

天津津塔为采用钢板剪力墙系统的超高层钢结构建筑,考虑到结构的特殊性和施工过程对结构应力状态造成的影响,在两种类型钢板墙的重要位置布置了传感器,对施工过程进行了应力监测。通过改变焊接顺序和焊接速度监测了剪力墙焊接应力场及残余应力场的变化;同时采用间接和直接的耦合分析方法分别对结构的应力状态和热效应进行了有限元模拟。在分析中采用了单元生死技术模拟焊接过程对结构的温度和应力场的影响,与温度场和应力场监测结果的对比分析证实了有限元模拟的有效性。不仅为天津津塔结构的性能评价和施工方法提供了依据和建议,对其他钢板剪力墙结构的设计与施工也具有参考价值。

Tianjin Tower is a super high-rise steel building using special steel plate shear wall. For its specific structure, sensors were laid in the key positions to monitor the development of instantaneous stress and residual stress of the two type of steel plate shear wall caused by the change of velocity and process of welding. Finite element model was built using direct and indirect coupling methods, and the welding process was simulated using birth-death element technology. The stress field variation by monitoring was contrasted and analyzed, it would supply an objective basis for guiding the construction and safety evaluation of construction process.