頁籤選單縮合
題名 | P-△效應對非彈性地震反應譜之影響與應用 |
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作者 | 蔡益超; 周南雄; | 書刊名 | 力學 |
卷期 | 11:3 1995.09[民84.09] |
頁次 | 頁205-214 |
分類號 | 441.571 |
關鍵詞 | Seismic inelastic response spectra; P-Delta effect; Inelastic model; Geometric stiffness; Weak first story; Lead rubber bearing; |
語文 | 中文(Chinese) |
中文摘要 | 本文研討P-Δ效應對非彈性地震反應譜之影響,以及其在幾個工程問題上之應用 。P- Δ效應經推導後,以幾何勁度 W/H 來表示。 本研究製作各種情況的η非彈性地震反應譜,橫坐標為系統的彈性周期,縱坐標為最大韌性 比已知時之降伏強度參數。系統之非彈性模式則包括彈塑性模式、雙線性模式及雙線性衰減 模式。 本研究比較 P- Δ效應在各種模式下之影響,發現最重要的影響參數為系統彈性周期與高度 。凡周期越長、高度越低的系統,其影響越大,能抵抗的最大地表加速度降低得最多。 高層建築具弱一層之情況與以鉛心橡皮墊隔震之建築物, P- Δ效應的影響甚為顯著,大大 地降低其耐震能力,設計時不可不慎。 |
英文摘要 | In this paper, the influence and some engineering applications of P-Δ effect on seismic inelastic response spectra were studied. After derivation, P- Δ effect was represented by geometric stiffness W/H. Seismic inelastic response spectra under various conditions were provided. In which the abscissa represents elastic period of the system before yielding and the ordinate represents the yield strength parameter with given maximum ductility demand. Inelastic models considered include elastic-plastic model, bilinear model and bilinear model with degradating stiffness. The influence of P- Δ effect on seismic inelastic response spectra were compared under different conditions. One reveals that the most important parameters are elastic period of the system before yielding and the height of the system. The longer the period, or the lower the system makes P- Δ effect more significant. In these cases, the maximum ground acceleration which the structure can resist will be reduced the most. P- Δ effect are very significant to high-rise building with weak first story or building equipped with lead rubber bearing. In this case, attention should be paid in the design stage because the seismic capacity of the building will be greatly reduced due to P- Δ effect. |
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