摘要
本文提供一种结构用刚架单元、结构周围土体用边界元的混合模型,用来分析地下薄壁结构的动力反应。文中通过混合法模型的参数分析,得出了确定地表计算边界截断长度的经验公式,在此基础上进一步提出了在地表边界上的移动芐点技术,还讨论了地下结构动力反应计算中的截止频率与频域插值问题。最后,通过计算实例,指出了在地表冲击波作用下地下薄壁箱形结构动力反应的某些特征。
In the paper the dynamic response analysis of the underground thin-wall Structures is presented by a hybrid model in which the structure and its Surrounding soil are simulated by frame elements and boundary elements respectively. An empirical formula for the truncating length of the ground surface in calculation is established from the parameter study of the hybrid model. On this basis, a moving nodes technique on the ground surface is proposed. Moreover, the cut-off frequency and the interpolation problem in frequency domain in the calculation of dynamic response of underground Structures is discussed. Finally, case studies are given which yield some characteristics of the dynamic response of the underground thin-wall rectangular structures to air-blast loading on the ground surface.
出处
《地震工程与工程振动》
CSCD
北大核心
1990年第1期51-58,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金
