Study On Shear Behavior Of RC Beams Strengthened With Wire Rope Mesh-polymer Mortar

According to《Technical Specification for Steel Stranded Wire Mesh andPolymer Mortar Strengthening of Building structures》; this text aims at someproblems of the technology, such as the craft of the technology doesn’t have enoughbackground information, and shear design computing method’s test date is notenough.; through “study on shear behavior of RC beams strengthened with wire ropemesh-polymer mortar’’, we mainly study on the following aspects:Seven joints strengthened with wire rope mesh-polymer mortar and onecontrastive joint were tested to study on the shear behavior of RC beams. Theparameter is strengthening quantity, and also talk about strengthening technology,species of polymer mortar, whether daub polymer mortar. Through these parameters,we could study the influence of the strength, then provide the basis for shear bearingcapacity. Test results show:(1) The wire rope mesh-polymer mortar bond well withconcrete interface, doesn’t have interfacial debonding. Sheat failure don’t happen onall specimans;(2) Using wire rope mesh-polymer mortar can restrain the crackdevelopment;(3) With the strengthening quality enhance, the shear bearing capacityalso enhance, the maximal improvement enhance66%;(4) The kind of polymermortar and strengthening technology don’t have apparent influence on the capacityand ductility;(5) Using wire rope mesh-polymer mortar can enhance the ductility ofRC beams, the sheat capacity enhance with the increase of strengthening quantity.Calcuating the shear capacity of RC beams strengthened with wire ropemesh-polymer mortar can use truss-arch model. This model can reflect differentmaterials’s force situation. The formula deduced from truss-arch model have goodagreement with test results.