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针对后张预应力混凝土空心板梁出现跨中梁底横向裂缝,采用了在梁底粘贴碳纤维板材的方法,并利用荷载试验对加固效果进行验证。试验结果表明:碳纤维板材的使用对提高后张板梁结构刚度的作用不大,而对间接提高结构强度、控制裂缝开展效果明显,加之碳纤维板材优良的耐久性能,表明其是一种可用于桥梁加固的可靠材料。
For the post-tensioned prestressed concrete hollow slab beams transverse cracks occurred at the bottom of the beam, the method of affixing carbon fiber sheet on the beam bottom was adopted, and the reinforcement effect was verified by load test. The test results show that the use of carbon fiber sheet has little effect on improving the structural rigidity of the post-tensioned beam, but has an obvious effect on indirectly increasing the structural strength and controlling cracks. In addition, the excellent durability of the carbon fiber sheet indicates that it is a kind of material that can be used for bridge reinforcement Reliable material.