有限差分法在电厂地下结构设计中的应用
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摘要
由于与周围土体相互作用机理复杂,地下结构的受力分析一直是电厂地下工程设计的难点。同一地下结构,由于采用的计算方法不同,对结构与土体的相互作用处理方式不同,内力结果差别显著。以某地下深埋转运转站设计为依托,综合考虑土体力学特性与变形特征、土与结构相互作用等要素,建立内力计算的有限差分法,对有限差分法在设计中应用的可行性进行探讨。结果表明有限差分法计算结果符合工程实际,对电厂地下结构的内力分析真实可信,可供电厂地下结构设计参考选用。
Since the mechanism of interaction between structure and soil is complex, the stress analysis of underground structure in power plant is always been a difficult problem. Due to the calculation method and the model of interaction between structure and soil is different, the internal force of sub ground structure is different significantly. Based on design of deeply underground transfer station, considering the characteristics of soil mechanics and deformation characteristics of soil-structure interaction, establish the internal force calculation of finite difference method. The calculate result is consistent with the practice experience.
Since the mechanism of interaction between structure and soil is complex, the stress analysis of underground structure in power plant is always been a difficult problem. Due to the calculation method and the model of interaction between structure and soil is different, the internal force of sub ground structure is different significantly. Based on design of deeply underground transfer station, considering the characteristics of soil mechanics and deformation characteristics of soil-structure interaction, establish the internal force calculation of finite difference method. The calculate result is consistent with the practice experience.
引文
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[3]王国波.软土地铁车站结构三维地震响应计算理论与方法的研究[D].上海:同济大学土木学院,2007.
[4]陈仲颐,周景星,王洪瑾.土力学[M].北京:清华大学出版社,1994.
[5]沈珠江,应变软化材料的广义孔隙压力模型[J].岩土工程学报,1997,19(3).
[6]DGJ08-11,地基基础设计规范[S].
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