Studies on Method of Limit States Design for Underground RC Frame Structures

地下钢筋混凝土框架结构极限状态设计方法研究

• 批准号: 02452193
• 负责人: WATANABE Hiroyuki
• 金额: $ 3.71万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452193/
• 关键词: Underground conduit; Dynamic earth pressure; Model exciting test; Numerical analysis; Ratio of shear rigidity; Rate of bearing share in load; Ductility; Limit states bearing capacity; Underground Conduit; Dynamic Earth Pressure; Model Vibration

In order to establish the method of "Limit States Design for Underground RC Frame Structures" it is most important for us to estimate the seismic forces acting on the structures. Main part of the seismic forces are horizontal earth pressures. In Japanese current aseismatic design standard it is specified to determine above dynamic earth pressures by Mononobe and Okabe's formulae which were, however, originally proposed for the purpose of the earthquake resistant design of retaning wall, so that they are not necessarily fit to such underground structure of flexible walls as underground conduit. Thus, we must establish an idea of mechanism of generating dynamic earth pressures for the first as well as the formula to be able to predict them reasonably.A model ground of air dried Gifu sand compacted in a shear testing apparatus and three composite models at each of which the model conduit of different rigidity was buried in the above same model ground were excited horizontally with sinusoi … More dal motions of resonant frequencies on a shaking table.The observed response dynamic earth pressures along a side wall of conduit show that the distribution of them at the same phase of base motion reverses in its direction as the shearing rigidity of conduit changes from lower to higher than the oneof surrounding soil layer. In the case of lower rigidity of conduit the response acceleration at its bottom is much lower than the one in free ground case. The simulations of above tests with FEM numerical models show the same behavior as mentioned above. Synthesizing both experimental and numerical results the mechanism of development of dynamic earth pressures acting on side walls of underground conduit has been clarified and a formula predicting them has been derived.Besides, the characteristics of the ductility of reinforced concrete frames have been clarified and a method of estimation of it has been established too. With all the results obtained above it may be said that a method to estimate the limit states bearing capacity of underground RC conduit has been established. Less

为了建立“限制RC框架结构的限制”，这是对结构的地震作用的最重要的但是，为了确定Monobe的公式晶木的动态压力，最初是为了抗地震的设计，以抗壁的设计，因此我们必须确定为forst Ass产生动态压力的概念。 Wella能够预测ly。摇晃的频率沿着导管的侧壁观察到的响应压力，即在较低的情况下，基本运动的分布在其方向上地面案例。派生的。在所有上述toeed toeshod toeshod的情况下，还建立了钢筋混凝土框架的特征

项目成果

渡辺 啓行: "地中ダクトの地域時動土圧の理論" 土木学会論文集. No.432/Iー16. 185-194 (1991)

Hiroyuki Watanabe：“地下管道中的区域时间土压力理论”，日本土木工程师学会论文集，第 432/I-16 号（1991 年）。

Atsuhiko Machida: "Evaluation of Ductility of R/C Members and Influence of Ductility on Inelastic Response Behavior of R/C Frame Structures." International Workshop on Concrete Shear in Earthquake,January 1991.(1991)

Atsuhiko Machida：“R/C 构件延展性的评估以及延展性对 R/C 框架结构非弹性响应行为的影响。”

渡辺 啓行: "地中ダクト側壁動土圧に関する実験的検討" 土木学会論文集. No.432/Iー16. 155-163 (1991)

Hiroyuki Watanabe：“地下管道侧壁动态土压力的实验研究”日本土木工程师学会论文集第 432/I-16（1991 年）。

渡辺 啓行: "数値実験による地中ダクトの動的水平動土圧の評価" 土木学会論文集.

Hiroyuki Watanabe：“利用数值实验评估地下管道中的动态水平土压力”日本土木工程师学会会刊。

Hiroyuki Watanabe: "An experimental study on dynamic earth pressure acting on side walls of underground conduit" Proc. of JSCE. No. 432/I-16. 155-163 (1991)

Hiroyuki Watanabe：“作用于地下管道侧壁的动态土压力的实验研究”Proc。