On The The Community Swimming Pool Roof Steel Structure Selection And Optimization Design

With the social and economic development, people’s living standards are improved, increasing the quality of life gradually. In many club-style buildings within high-end communities, there are indoor swimming pools with sport, recreation and leisure as one often. Though the community swimming pool, not as large as the special swimming pool used for game and training, does not require the audience seats, its span roof structure is still large, therefore, there is a wide space for reacerch on the reasonable structured selection and optimization.Based on the club indoor swimming pool roof engineering in Qingshui garden district of Zhengzhou city, this thesis first gives the analysis on the static characteristics of primary and secondary steel frame beam+reinforced concrete combination roof plate and the action of seismic performance under the design response spectrum from the original design, and draws the conclusion of internal force of roof structure, stress and deformation response. Then, according to the engineering construction scale and structure characteristics, it puts forward three kinds of roof structure as the alternatives.(1) The first adopts the line beam and changes the web height of the main beam. This is mainly considerd the main girder for bending stress, the maximum bending occurred in the mid-span, to ensure that it can save steel close to both ends of the support in the range of the stress of the beam.(2) The second selection is the the Fish-bellied plane truss, which coverts the force of the beam into the tube truss axial force, which is more reasonable and could save construction materials, reduce the deflection of the mid-span while reducing weight.(3) The third alternative is the beam string structure, which is a relatively new form of beams. It could make beam itself a system through tensioning lower chord, increase the stiffness of beam, and improve its carrying capacity.The static and dynamic analysis on all the alternatives above could get the optimal structure of size to meet the design requirement.Finally, this study will sum up several conventional roof structures of the swimming pool in this project. On the basis of meeting the design requirements, it has got the optimal structure and related dimension for other similar projects’reference.