本文总结了在短期单调荷载作用下混凝土的破坏机理，断裂韧度和强度理论方面的研究成果。

This paper summed up the recent works about failure mechanisms, fracture toughness and failure criteria of concrete which are monotonously loaded in a short-term.

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本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。

Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.

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介绍了对含闭合裂缝岩石试件在达到峰值压剪荷载时卸荷的裂缝断裂形态观察结果。

The observational result of crack fracture form for rock samples with close crack under unloading after the peak compression shear load.

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