For historical and practical reasons, concrete structures in existing and new buildings are occupying an absolute number of percentages in China.
在中国，由于历史和现实的原因，混凝土结构在已有和新建房屋仍然占有绝对的比例。
Concrete structures may bear not only static or repeated loading, but also cyclic loading in practical engineering.
在实际工程中钢筋混凝土梁不仅承受静荷载或重复荷载作用，还可能承受反复荷载作用。
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