strain-hardening steel

AFRP reinforcement have two characteristics of short-term mechanical behavior compared to steel bars: ( 1) Tensile stress-strain curve is close to a straight line and have no yielded point;

与传统的预应力钢筋相比，AFRP筋材的短期力学特性主要有：（1）应力-应变关系近于直线，没有屈服点；

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The steel frames began to buckle under the strain.

钢架在重压下开始变形。

《牛津高阶英汉双解词典》

It was pointed out that in tensile test with specimen of C-grade casting steel, the load-halt method or the judgment from the pointer swing of strain instrument could not give clearly the yield point except the graphical analysis method.

指出测定C级钢拉伸试样屈服点时，用载荷停顿法或指针法，屈服现象不明显，只有图解法可一次测出未知屈服指标。

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The steel tube whose longitudinal tension strain is the biggest has no confinement effect on core concrete.

纵向受拉最大点的钢管对核心混凝土没有套箍作用。

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Meantime, combined the flexural carrying capacity ultimate state characteristic of concrete thin-walled box girder, when the strain of longitudinal steel at tensile region firstly arrives at 0.01, the ultimate flexural capacity calculated formula and designed formula of concrete thin-walled box girder has been obtained.

同时，结合混凝土薄壁箱梁抗弯承载力极限状态下的特点&以受拉区钢筋应变达到0.01为标志，推导得出了混凝土薄壁箱梁抗弯极限承载力计算公式和设计公式。

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