Description: The building for a six-storey reinforced concrete frame houses, the roof has partially prominent between the staircases and water storage tanks. Concrete strength grade: Leung for C20, column C25. Concrete density 2500kg/m3 will be the subject of the framework structure of the column housing modal analysis, solving of the structure before the 8-order natural frequencies and corresponding modal type. Ping framework, profiles are shown in figure 1, Figure 2. Scantlings see Table 1, Table 2. Its materials for concrete, relevant parameters are: Young s modulus C20 for 2.55e10N/m2, C25 for the 2.8e10 N/m
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