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題 名 | Vertical Acceleration Effects on the Soil-structure Interaction of Multistory Buildings=垂直加速度對樓房之土壤結構互制作用之影響 |
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作 者 | 巫垂晃; 林炳昌; | 書刊名 | 中原學報 |
卷 期 | 26:1 1998.02[民87.02] |
頁 次 | 頁27-38 |
分類號 | 441.2 |
關鍵詞 | p-△效應; 土壤結構互制; 高樓; 黏彈半空間; P-△effects; Soil-structure interaction; Multistory buildings; Viscoelastic half spaces; |
語 文 | 英文(English) |
中文摘要 | 本文針對樓房之土壤結構互制分析公式增加考量垂直加速度之影響。單自由度模 式用以模擬有軟弱地面層的樓房。此分析模式考慮了基礎座落於黏彈性土壤中,同時也包含 P-△效應之影響於結構系統�堙C經由以1995年1月17日的阪神地震記錄作為地表振動的算例 中顯示,垂直加速度的考量加強了P-△效應,進而增加結構體之側向變形及樓層剪力,導 致此類增加現象的有關因素包含土壤狀況、結構體柔軟度及柱子所受之軸力與臨界載重比值 等,值得吾人特別注意。 |
英文摘要 | In this paper, a method is proposed for the soil-structure interaction analysis which includes both horizontal and vertical earthquake effects. A single-degree-of-freedom system is adopted to model multistory buildings with a soft first story 〔1〕. The model is analyzed as a linear elastic system with a rigid footing, which rests on the surface of a viscoelastic half space. The proposed procedure also include the second order P-△ effecs on the system. A numerical example is presented, in which the seismic response of the superstructure together with its foundation system is analyzed, and based on the earthquake data recorded at JMA Kobe Observatory on Jan. 17, 1995. It is found that the vertical acceleration aggravates the P-△ effects. This leads to significant increases in the lateral deflections and story shears. The increases are a function of soil condition, the structural flexibiliy and the ratio of axial force to the critical load of the columns. |
本系統中英文摘要資訊取自各篇刊載內容。