【摘要】 大跨型钢-混凝土转换层桁架是一种新型高层建筑结构转换形式，监测并分析其施工期力学性能对高层建筑安全至关重要。结合实时监测和数值模拟两种方法对高层建筑新型大跨型钢-混凝土转换层桁架的力学特性进行了分析。以位移和应力为指标，对比并验证了实时监测和数值模拟结果的一致性，总结出该新型大跨型钢-混凝土转换层桁架的力学性能。结果表明：整个施工过程中，实时监测和数值模拟所得转换层桁架各杆件的应力和位移结果均满足规范要求，且有较大的安全裕度；施工楼层越高，该楼层荷载对桁架应力和位移影响越小；脚手架拆除阶段，桁架位移会出现大幅上升。本文采用的有限元计算方法可用于新型大跨型钢-混凝土转换层桁架的力学性能分析。更多还原

【Abstract】 The large-span steel-concrete transfer layer truss is a novel conversion form of high-rise building structure. Monitoring and analyzing the mechanical properties during construction is critical to the safety of high-rise buildings. Real-time monitoring and numerical simulation technology were used in combination to analyze the mechanical characteristics of the large-span steel-concrete transfer layer truss of high-rise building during construction stage. In terms of displacement and stress as indicators, the consistency between the realtime monitoring values and the numerical simulation results is assessed and verified. In addition,the mechanical properties of the novel large-span steel-concrete transfer layer truss were presented. The results show that during the construction process, the stress and displacement values in each structural member of the conversion layer truss captured by real-time monitoring and derived from the numerical simulation meet the requirements of the specification and have a great safety margin; the higher the construction floor level, the smaller the influence of the vertical load on the truss stress and displacement; during the scaffold dismantling stage, vertical deflection would occur in the transfering truss. The finite element method can be used to evaluate the mechanical properties of the new large-span steel-concrete conversion layer truss.更多还原