一种框架-核心筒结构体系施工全过程结构分析简化算法

A Simplified Algorithm for Structural Analysis of Whole Construction Process of Frame-core Tube Structure System

针对框架核心筒结构体系超高层结构施工阶段分析常规数值计算方法所面临的模型体量巨大、计算速度慢、建模修改耗时巨大等问题,提出了一种采用梁单元模拟核心筒的新的简化算法。该方法能在很大程度上相对减少模型单元数目,实现计算速度快、模型修改而导致的反复计算耗时少,准确计算核心筒因混凝土收缩、徐变引起的竖向变形,其最终目的能够在整个施工阶段,快速有效地预测结构标高及构件内力变化,确定各施工阶段结构标高的补偿量,从而为工程设计和施工提供参考。

In view of the problems faced in the analysis of conventional numerical calculation methods for the super high-rise structure of the frame-core tube structure system during the construction stage,such as the huge volume of the model,the slow calculation speed,and great time-consuming of the model modification,a new simplified algorithm is proposed to simulate the core tube with the beam element.This method can greatly reduce the number of model elements,realize fast calculation speed,reduce the repeated calculation time caused by model modification,and accurately calculate the vertical deformation of the core tube due to concrete shrinkage and creep.The final purpose of this method is to quickly and effectively predict the change of structural elevation and internal force of components,and determine the amount of compensation for structural elevations in each construction stage,So as to provide reference for engineering design and construction.