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预制楼板普遍被用作各种工业与民用建筑的楼地面结构构件,但往往沿预制楼板支座搁置方向产生横向裂缝。这些裂缝不仅直接影响工程质量,建筑物的美观,而且工程竣工验收达不到合格标准。 在以往的施工过程中常采用以下方法:①在支座板缝中设置钢筋加固带(设置一根6～8mm,长800～1000mm钢筋)的做法。这种钢筋嵌在板缝里,离地面表面40～50mm。它对抗震有一定的作用,但不能有效抵抗因支座负弯矩产生的表面拉
Prefabricated floor slabs are commonly used as floor structure components for various industrial and civil buildings, but tend to create transverse cracks along the direction of the prefabricated floor support. These cracks not only directly affect the quality of the project, the beauty of the building, but also the acceptance of the project cannot meet the eligibility criteria. In the past construction process often used the following methods: 1 set in the support plate seam reinforcing bar (set a 6 ~ 8mm, length 800 ~ 1000mm rebar) practice. This kind of steel bar is embedded in the board seam and is 40-50mm away from the surface of the floor. It has a certain effect on the earthquake, but it can not effectively resist the surface pull caused by the negative bending moment of the bearing.