Study of reasonable construction of whole-situ concrete connection of T beam diaphragm

For the study of concrete cracking caused by concrete autogenous shrinkage and new-old concrete adhesive in parts of whole-situ concrete connection, the concrete stress based on autogenous shrinkage of concrete, reinforcement structure in parts of whole-situ concrete connection and bond performance of new-old concrete were analyzed in this paper. The results shown that with the increase of width of whole-situ concrete connection, the shrinkage stress of concrete increased; with the improvement of reinforcement ratio in the whole-situ concrete connection, the shrinkage stress of concrete reduced; the likelihood of concrete cracking in whole-situ concrete connection could reduced basis for reinforcement principles of thin and dense; the likelihood of concrete cracking along the concrete joint surface could reduced through artificial chiseling and reinforcement connection on new-old concrete joint surface. Finally, the reasonable construction width and other structural measures of whole-situ concrete connection were given, and the requirements of the construction technology of whole-situ concrete connections were put forward.