Study Of Behavior And Strength On Cross Section Of The Concrete Superpose Beam

The concrete superposed structure is a kind of structure shape, belonging to assembled monolithic concrete structure, which combines with cast-in-site concrete structure and prefabricated concrete structure. In practical application, it is often applied and extensively to floorslab structure in particular, and has prominent advantages as economizing materials, convenienting for construction, being in favor of resisting earthquake action, better monolithic property than assembled concrete structure.Study of utmost behavior and strength is the main of the bended concrete superposed member in the dissertation. And then, a new type of superposed beam ,with notch at each end of the prefabricated member, is studied in this dissertation. This paper includes the several contents as followed:1) Introducing concepts of concrete superposed structure, summarizing the study condition of it at home and abroad, pointing out the research trend, nailing down the main research contents and laying a course.2) The character of the concrete is introduced first. Differences between strength of concrete studying and strength of materiak elasticity or plasticity are distinguished. Basic equations and method of strength of concrete are also established.3) Comparing with the test result, the whole process result of flexural member to failure analyzing by strength of concrete is very close to it. The confirmation also provides foundation to study superposed structure flexual member.4) According to basic equations of strength of concrete, the study of concrete superposed flexural member at ultimate state emphasis on relationship between ultimate load and design parameters-am and ah.Contrast with the test results and principles in code GB50010-2002, proposal and design method have been tabled.5) A new type of superposed beam used in Wutaizha terminal market, with notch at each end of the prefabricated member, is analysed, and design method of it is also regard as the representative of the superposed beam with notchs.6) In the end, what has been done in this paper is summarized, and theproblems that need ulteriorly be studied are pointed out.