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汶川地震中,预应力钢筋混凝土板破坏较多,震后对部分受损板需采用粘贴CFRP布方式进行加固。为研究加固可靠性,对包括18块CFRP布加固的受损板和1块未受损板共19个试件进行加载试验研究,探讨不同粘贴方式、粘贴量及板不同损伤程度下,板的抗弯承载性能及破坏模式。结果表明:1CFRP布采用单层四幅的粘贴方式加固构件时,抗弯极限承载力增长最为显著;2对于加固轻微破坏的预应力混凝土空心板,采用幅宽为100mm单层双幅的CFRP布粘贴;对于加固中度破坏的预应力混凝土空心板,采用幅宽为75mm单层三幅的CFRP布粘贴;3对于加固严重破坏的预应力混凝土空心板,采用幅宽为75mm单层四幅的CFRP布方式粘贴。
Wenchuan earthquake, the prestressed reinforced concrete slab more damage to the part of the damaged plate after affixed with CFRP cloth reinforcement. In order to study the reliability of reinforcement, a total of 19 specimens, including 18 CFRP sheets and 1 intact sheet, were subjected to loading test to investigate the effects of different bonding methods, Bending load bearing capacity and failure mode. The results show that the flexural ultimate capacity increases most obviously when 1CFRP fabric is reinforced by a single layer and four pieces of plastering method. 2 For prestressed concrete hollow slabs with slight damage, 100mm single- For reinforced prestressed concrete hollow slab reinforced moderately, the width is 75mm single layer three CFRP cloth; 3 For the reinforced severely damaged prestressed concrete hollow slab, the width of 75mm single-layer four CFRP cloth Paste.