If the concrete of a prestressed slab spalls in fire,the reinforcement will be exposed to flame,and the slab would soon lose its bearing capacity due to breaking of reinforcement caused by burning.

 
  • 在火灾下预应力板迎火面的混凝土若发生爆裂,受力钢筋将裸露于火中,板将因钢筋被烧断而很快丧失承载力。
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