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为增加侧向刚度,降低节点复杂程度,将预应力钢索引入高层钢框架中,考虑不同布索方案和节点半刚性影响,分析结构的抗侧性能。结果表明:预应力钢索能显著提高节点半刚性连接高层钢框架的抗侧刚度,方案1优于方案2。1×10~9N·m/rad和1×10~6N·m/rad可作为刚接和铰接的刚度值。在模态分析中,不能体现钢索预应力改变对结构基本周期的影响。
In order to increase the lateral stiffness and reduce the node complexity, the prestressing steel cable was introduced into the high-rise steel frame, and the lateral performance of the structure was analyzed considering the different cable schemes and the semi-rigid effect of the joints. The results show that the prestressing cable can significantly increase the lateral stiffness of the semi-rigidly connected high-rise steel frame, which is superior to the schemes 2.1 × 10 ~ 9N · m / rad and 1 × 10 ~ 6N · m / rad Rigid and articulated stiffness values. In the modal analysis, the influence of the change of the cable prestress on the basic period of the structure can not be reflected.