广州珠江新城西塔内倾斜弧墙施工过程数值模拟

Numerical Simulation of Construction Process of Inward Inclined Arc Wall in Guangzhou Pearl River New Town West-tower

广州珠江新城西塔内倾斜弧墙倾斜角度较大,由于其结构设计阶段的力学条件与施工阶段并不相同,所以在该结构施工前对施工过程进行数值模拟,以此确定最不利施工步,并对其进行现场监测。由数值模拟结果及监测结果可以看出:内筒楼板滞后核心筒弧墙两层施工是确保内倾斜弧墙满足力学要求的基本条件;连接内倾斜弧墙与槽形墙结构的连梁混凝土在施工过程中开裂可能性较大,但受力钢筋处于弹性阶段,其应力空间较大。

The inclined angle of inward inclined arc wall in Guangzhou Pearl River New Town West-tower is large. Because of the differences of mechanical conditions during structural design and construction, numerical simulation for construction process before construction is very important, according to which to determine the most disadvantageous construction steps that will be monitored in construction stages. Based on the results of numerical simulation and monitoring, it can be gained that construction of inner tube floor that is two layers later than construction of core tube arc wall is basic to assure inward inclined arc wall to meet mechanical condition. Furthermore, the concrete of connecting beam which connect inward inclined arc wall and groove- shape wall is easy to crack during construction, however, steel bar is at elastic stage to assure stress space large enough.