天津茱莉亚学院超限结构设计中的关键技术问题研究

Key technical problems research in structure design of Tianjin Juilliard School

天津茱莉亚学院地上结构采用钢框架-支撑体系,结构体型复杂,同时存在平面不规则、连体、大悬挑结构等超限情况。分析了天津茱莉亚学院超限结构设计过程中的关键技术问题及解决方案。在结构设计中,基于抗震性能化设计原则提出了合理的性能目标,首先应用多种计算软件进行了弹性反应谱、弹塑性时程和抗连续性倒塌等整体分析;其次对结构主桁架、楼板应力和复杂节点进行了性能分析,全面考察了结构在不同荷载工况作用下的受力性能,并采取了有针对性的构造措施。经多项分析验算,证实结构能够达到既定的抗震性能化目标,确保结构安全可靠。

Steel frame-bracing system was used in the above ground structure of Tianjin Juilliard School. The structure was complex, and there were several beyond standard problems such as irregular plane, connected structure and large cantilever structure. The key technical problems and the corresponding solutions in the structure design of Tianjin Juilliard School were analyzed. In structural design, based on the principle of seismic performance-based design, reasonable performance objectives were put forward. The elastic response spectrum, elastic-plastic time history and anti-continuous collapse were analyzed by various calculation software firstly. And performance analysis of the main truss, floor slab stress and complex joints was carried out to study the mechanical behavior of the whole structure under different loading conditions, and targeted structural measures were taken. Through comprehensive analysis and calculation, it was proved that the structure can achieve the established goal of seismic performance, thus ensure safety and reliability of the structure.