The paper evaluates the limitations that semielliptical surface crack in a shaft is simplified to a unilateral crack in a finite boundary plane and a cross straight line crack in a semi infinite body.

评价了将轴表面半椭圆裂纹简化为有限边界平板的单边裂纹问题和半无限体表面穿透直线裂纹问题来处理的局限性。

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On the hypothesis of plane cross section, L-shaped reinforced concrete column was divided into three fragment line element of elastoplastic zone at both ends and elastic zone in the middle.

在平截面假定的前提下，将钢筋混凝土L形柱划分为两端弹塑性区、中间为弹性区的三分段杆单元模型。

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