The Safety Analysis And Appraise Research Of RC Structure During Construction

The risk probability is changed in the structural life.On the early stage of the structural life-construction,the structural risk probability gets the maximal point.The safety accident will happen if the unseemliness way is adopted.lt is very necessary and pressing to research the structural safety during construction.Based on engineering investigation, the factors that affect the structural safety during construction are summarized and analyzed.The structural performance during construction are researched into two side: construction load and early stage bearing capacity of reinforced concrete member. Different kinds of construction loads are summarized. Based on the rational hypothesis,the early stage bearing capacity of beam,slab and column is researched. Because of the time_changing performance of structure during construction,a kind of simplify analysis method -modular method is summarized. A parameter-safety factor is advanced.Considering the short of safety appraise method of structure during construction,the thought which is based on the Fuzzy Evaluation method in systems engineering is put forward to build the safety appraise model. The present situation of safety appraise is simplified summerised.The basic theory and method of fuzzy mathematics are introduced, the process to build the Fuzzy Evaluation model is summarized.According to the construction code,standard and regulations,the appraise factors are advanced and analyzed, the subjected function are built, the expert investigation is developed, based on the result of the investigation and the Analytical Hierarchy Process (AHP) method the appraise factors weight are confirmed. At last the Fuzzy Evaluation model of structure during construction is found.Based on the OOP method, the Fuzzy Evaluation of structure during construction system is developed with visual basic programe.