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利用大型通用有限元软件MSC.MARC和基于MARC平台开发土的修正D-P本构模型子程序、钢筋混凝土杆系纤维模型子程序,建立上部结构-地下室-土整体计算模型,对爆炸冲击波作用下高层剪力墙结构附建人防地下室的倾覆机理进行了数值计算。在此基础上,提出了高层建筑附建式人防地下室倾覆时土压力简化计算方法。该方法将地基土视为Winkler地基模型,弹簧参数根据地下室转动极限状态确定。算例计算结果表明简化算法的计算结果与有限元计算结果吻合较好。
Using the large common finite element software MSC.MARC and the modified DP constitutive model subroutine of soil based on MARC platform and the reinforced concrete bar fiber model subroutine, the superstructure-basement-soil integrated calculation model is established, Numerical simulation of the overturning mechanism of the basement in the construction of the shear wall structure. On this basis, a simplified calculation method of earth pressure at the time of overturning of the attached building civil air defense basement in high-rise building was put forward. The method considers the foundation soil as the Winkler foundation model and the spring parameters are determined according to the rotation limit of the basement. The calculation results of the example show that the calculation results of the simplified algorithm are in good agreement with the finite element calculation results.