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钢混结构内爆拆除法数值模拟研究

Numerical Simulation of the Reinforced Concrete Structure Implosion Demolition

【作者】 李胜林

【导师】 刘殿书;

【作者基本信息】 中国矿业大学(北京) , 结构工程, 2010, 博士

【摘要】 通过对内爆法爆破拆除工程实例的技术研究,分析总结了内爆法技术特点。采用静力非线性分析及力学分析方法对内爆法拆除机理进行分析探讨。论文研究使用LS-DYNA中的混凝土本构MAT159,采用分离式constrained钢筋混凝土模型,对—10层5跨的混凝土单榀结构内爆法拆除进行了数值模拟,计算分析得出了结构的响应、主要构件的内力演化以及结构失稳的临界条件,并对不同拆除顺序下结构倒塌的过程进行了模拟研究。

【Abstract】 By studying the implosion demolition projects, the technical characteristics is summarized and analysed. Adopting nonlinear static analysis method and analytical mechanics method, the author discusses the collapsed mechanism of the structure. This paper systematically tests and verifies the concrete constitutive MAT159 prepared to use in LS-DYNA software, and through the separating constrained reinforced concrete method analyses the demolition of bottom column of 10-stories 5-spans, as well as structural response, internal force evolution of remain structural member and the crictical destabilization condition. Finally the paper analyses the effects on structure collapse by different sequential removal.

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