Study On Seismic Performance Of Reinfored Concrete High-Rise Building Parts Of Frame Structure With Dense-Column And Deep-Beam

With the rapid economic development of human society and continual improvement of technology, high-rise building structure is becoming more diverse and complex. Currently, there are frame structures, shear wall structures, frame-shear wall structures, frame support structures, tube structures, mega-frame structures and so on. But, the selection of building structure is critical, it is crucial to the economic, applicability and safety of the whole project. Based on the characteristics of the smaller lateral stiffness and the lower maximum applicable height of Reinforced Concrete frame structure, we set up a structure which call "parts of frame structure with dense column and deep beam" in this paper through setting dense-column and deep beam in the parts of framework. Parts of frame structure with dense column and deep beam combines the advantage of framework and dense column&deep beam, just like frame-shear wall structure combines the advantage of framework and shear wall. In a certain building height, it can satisfy the requirements of economic, applicability and safety, it also has a good seismic performance. To high-rise buildings, horizontal seismic action is essential for the structural design of buildings. Therefore, it’s very important to lucubrate the seismic performance for parts of frame structure with dense column and deep beam.Using the general finite element software SAP2000, this article gets a parts of frame structure with dense column and deep beam model according to finite element theory. Modal analysis was carried out, and then we checked its characteristics of natural vibration; Modal response spectrum analysis was also carried out, and then checked it’s characteristics of Force and deformation under frequent earthquakes; Finally, converted the acceleration response spectrum to absolute acceleration and pseudo relative velocity response spectrum using MIDAS program, and calculated the characteristic period of shock waves. According to the method of shock wave selection, we selected EL centro, Taft, Lanzhou-1artificial wave as the time-history analysis inputs; Elastic time-history analysis for structure was carried out, then checked its seismic behavior under frequent earthquake; And also established frame structure and frame-shear wall structural model for comparative study. The results of study show:Compared with frame structure, Fundamental natural period for parts of Reinforced Concrete frame structure with dense column and deep beam has been greatly reduced, the lateral and torsional stiffness of frame structure increased substantially; The force and deformation improved; Under horizontal seismic, the main lateral deformation of Structure is shear-dominated; It has a similar dynamic characteristics with frame structure. but its seismic performance is better.