| In worldly big tide in sustainable development,"green building"with its the superiority of save on water, save on soil, economize on energy and cure pollution , is becoming the main rhythm that new century construction.Reinforced concrete special-shaped columns structure system, adoption T- Shaped, L- Shaped and Cross(+) section of column, replaces to the traditional rectangle section column, with the lightweight material filler-wall replaces to the self-weight bigger filler-wall with soil brick. Frame columns inset the filler-wall ,avoided the influence that the comer of the room columns outstanding to indoorses view and take up the using space. At the same time, this structure has some advantages as the frame structure ,such as arranging neatly, comparting easily etc., deeply welcoming by inhabitant and real estates company , is a building structure system that have the vast development foreground and satisfying the request of green building" .Current, the reinforced concrete special-shaped columns structure system lacks the actual measuring data of earthquake damage and the comprehensive aseismic performance of structure system , the structure system not yetis included in the national code, needing the thorough research.This paper related to a practical project that a high school is big bay building with teaching,experiment and studying, aim at the higher seismic fortification criterion region(8 degree of seismic fortification intensity), aseismic disadvantageous building site(III type site), and the building loading much( the building' self- weight is over the 9.0 KN/ m2 ). Compared to R.C.rectangle columns , studying the aseismic performance of the R.C.special-shaped columns pure frame structure ,the R.C.special-shaped columns frame-truss structure and the R.C.special-shaped columns frame-shear wall structure .Under the horizontal earthquake action and wind force , aim at "the pure frame structure with rectangle columns", "the pure frame structure with special-shaped columns ", "the frame-truss structure with special-shaped columns" and"frame-shear wall structure with special-shaped columns" , earthquake action analysis was done by the spacial finite element method through the changes structural parameter.Analyzing systematically "structure vibration mode", "vibration period", "structure lateral rigidity ", "seismic action force" , "seismic response force" , "floor seismic shear force", "lateral horizontal displacement of structure" and "members internal force " .Results indicate:(1) Based on equal area , the special-shaped columns replaced the rectangle columns , the structural lateral rigidity enlarges, the lateral displacement minishes obviously, the earthquake response increase slightly , the biggest increasing amount of frame columns axis-compress ratio is smaller than 0.08.the whole aseismic performance of structure has improved;(2) When the section's length and section's thickness ratio of special-shaped columns is smaller than 3.6, the structure benefits to resist seismic action;(3 )The angle of horizontal seismic action with the whole coordinate is 0 degree, structure earthquake response is bigger, belonging to a control factor of structure aseismicdesign;(4) The frame-truss structure with special-shaped columns and the " A " -brace has the biggest lateral rigidity;(5) The frame-shear wall structure with special-shaped columns have bigger lateral rigidity and smaller displacement , members internal force enlarged just rightly, have much superiority of resisting seismic action;(6) In the higher seismic fortification criterion region(8 degree of seismic fortification intensity ), aseismic disadvantageous building site(III type site),adopting special-shaped columns structure system, should reduce possibly the building's self-weight in order to reduce the earthquake response;(7) The response spectrum method of computing seismic response and the time-history analysis method have similar analysis result.Finally,the results in this pa... |
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