Concrete is strong in compression but weak in tension,and there is a tendency for the concrete to crack on the plane subject to tension should the stress become large enough.

• 混凝土有良好的抗挤压能力但抗拉伸的能力却很弱，因此在受到拉力作用的平面上，混凝土容易断裂，压力也变得足够大。