Simplified Design Method And Application Of Reticulated Prestressed Reinforced Concrete Rigid-frame Beam

With the rapid development of economy,widespread social demand and the injection of capital,the construction industry has been stimulated to vigorous development.The increasing complexity of building function,the appeals to buildings with large-scale and long-span bring much pleasure in the functional experience and visual shock to users,and also bring more challenges to structural engineers and technicians at the same time.The reticulated prestressed concrete beam(RPCB)has attracted a wide attention and been applied in the design of horizontal structural members with heavy load and long span for its high cost-effectiveness in material level and feasibility in member level.So far,only the static loading test of RPCB was conducted when it was firstly applied in practical engineering to ensure its feasibility.The relevant research and design method were still insufficient.Considering the existing engineering cases and experiments,the structural performance of RPCB was studied in this thesis.The research contents are as follows:(1)The design points and service conditions of RPCB were analyzed,the design procedures were summarized.And the influence of RPCB on the behavior of the structure was analyzed.Furthermore,a simplified design method for RPCB based on the current design code was proposed.(2)The applicability and cost-effectiveness of RPCB,prestressed concrete solid beam and steel truss under the condition of long span and heavy load were evaluated on the basis of specific practical engineering.In addition,the influence of different structure forms on the overall performance of the structure was also provided.(3)One RPCB was designed by using the proposed simplified design method.The internal forces were obtained,and the key sections of the element were designed.Finally,the construction detail and requirements for RPCB were provided.