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目前国内外学者对于确定超前施工层数方法的研究还比较少,现行规范中没充分考虑各种墙肢之间连接,因此规定的长度系数取值往往偏大,以至于确定的超前施工层数偏低.基于安全与经济两方面的考虑,从《高规》附录D的规定出发,根据实际的结构和荷载特点,运用ANSYS软件对超前施工核心筒进行屈曲模拟分析,根据数值模拟结果重新计算考虑墙肢实际支撑条件后的计算长度系数,运用得到的实际计算长度系数,根据规范计算出等效竖向均布荷载,与有限元模型根据实际荷载计算得到的等效竖向均布荷载进行比较,看是否满足规范要求.增加或减少超前施工层数进行试算,比较分析考虑墙肢实际支撑条件前后核心筒墙肢的稳定性,最终得到最大超前施工层数.以武汉中心核心筒超前施工为例进行研究,结果表明,所述的比较方法是可行有效的,能得到既安全又经济的最优超前施工层数.
At present, scholars at home and abroad are still few in determining the method of advanced construction. The existing codes do not fully consider the connection between various wall elements. Therefore, the specified length factor tends to be too large, so that the determined advance construction layer Based on the safety and economy considerations, starting from the provisions of Appendix D of “High Regulation”, according to the actual structure and load characteristics, using ANSYS software to carry out the buckling simulation analysis of the advanced construction core barrel, recalculate according to the numerical simulation results Considering the calculated length coefficient after the actual brace condition, the equivalent vertical uniform load is calculated according to the code, and the equivalent vertical uniform load calculated by the finite element model according to the actual load Compare to see whether to meet the requirements of the specification.Adding or reducing the number of advance construction layer trial, comparative analysis of the stability of the core wall limbs before and after the actual support conditions, and finally get the maximum advance construction layer.With Wuhan core center tube advanced Construction as an example, the results show that the comparison method is feasible and effective, can be both safe and economical optimal Advance construction level.