Study On H Steel-concrete Anchorage Joint Elastoplastic Mechanical Properties

Our country is an earthquake-prone country, earthquakes often caused great disaster, including the loss of life and property. Occur at the global level 7 or more devastating earthquake disaster, the steel structure building and mixed suffer less, therefore, the steel and the application of composite structure has been widely used in Bridges and construction projects. The steel structure and mixed anchorage joint is the key part of the common stress. A large number of studies have shown that the destruction of the composite structure especially in the joint part is most obvious. Therefore, in view of H section steel and concrete anchorage joint local structure elastic-plastic performance in experiment and theory analysis, explore the transfer characteristics of steel and mixed combining site and the failure mechanism, optimizing the anchoring structure of H section steel and concrete form of reasonable structure, has important theoretical significance and engineering application value. In this paper, the main work is as follows:① of steel and concrete composite structure anchor connection technology research status are summarized, summarizes the existing anchorage connector main tectonic characteristics of the type and scope of application.②design and production of the anchorage zone respectively by traditional steel baffle and shear reinforcement type two kinds of strengthening structure in the form of a full scale H section steel and concrete anchorage joint specimens, in h-beam elastic-plastic bending load experiment, such as load- displacement curve, strain effect indexes were observed, and obtain the H section steel and concrete anchorage zone of failure mode and its geometry features.③ of the two kinds of H section steel and concrete anchorage joint specimens of elastic-plastic finite element numerical simulation of the loading process of simulation, on two different structure forms of anchorage structure stress mechanism and failure form of the calculation and analysis, and the strain calculation results, as compared with the experimental results validate the correctness of the simulation analysis.④ compared the two kinds of H section steel and concrete anchorage joint structure form of the experimental results and simulation results, summarizes the advantages and disadvantages of both, puts forward wing for H type shear reinforcement to strengthen structure form between steel and concrete composite structure reasonable anchorage joint structure form.Paper based on a full scale specimen experiment and the simulation analysis, preliminary has been clear about the two kinds of H section steel and concrete anchorage joint structure forms of force transmission characteristics and failure mechanism, compares the advantages and disadvantages of two kinds of structure forms, related conclusions can provide certain reference for practical engineering application, and the technical specification for steel structure and mixed connection structure measures to provide the reference.