本文探討具裂縫之靜不定管結構承受垂直地震力後的強制變位塑性行為。以極限解析及彈塑性破壞力學的綜合解析法，加上簡易柔度與J積分的評價法，對於材料的破壞韌性值J/sub IC/與裂縫進展抵抗dJ/da等影響管結構的結構因子進行分析，以瞭解塑性鉸形成的情形，裂縫部的回轉角、變位及裂縫夾角等關係。計算解析例題數值解析製成圖後的觀察，更能瞭解裂縫進展的情形，dJ/da值的大小明顯地影響裂縫部的回轉角、變位及裂縫夾角增加的情形，本文可提供建立管路劣化的健全性評估及進一步提高電廠管路結構可靠度的基礎。 This paper study the plastic behavior of a cracked indeterminate pipeunder the forced displacement due to the vertical earthquake. Usingthe combination technique of limit analysis and elastic- plasticfracture mechanics to study the relation between J/sub IC/ and dJ/daso that the formation of the plastic hinge can be understood. Thenumerical results are plotted as the associated figures that can showthe plastic hinge, and crack growing much clear. The value of dJ/da isthe most effective factor to the deformation around the crack.
關聯:
八十九年度中華民國力學學會年會暨第二十四屆全國力學會議論文集=24th National Conference on Applied and Theoretical Mechanics，頁N.A.(CD)
