The Optimization Design Of Based On The Pushover For Reinforced Concrete Braced Of Frame Structure

Adding a certain proportion of concrete sway brace in frame structure is referred toreinforced concrete sway brace frame structure, which belongs to the ductility structureof multichannel fortification. The resistance to lateral stiffness of this structure is greatlyimproved by adding concrete sway brace. The collapse resistance of the beam part in thisstructure, especially the frame column, is superior to the pure frame structure under thesame seismic intensity.The PKPM software developed by China construction science research institute isused to build the model. A building with13floors and3x5span structures is adopted,whose stiffness and mass is in uniformed distribution and regulation. The models offrame structure, reinforced concrete sway brace frame structure and frame-shear wallstructure are respectively set up under the same seismic intensity, flat form andengineering conditions. By adjusting the form and section size of the brace, build11setof models, then conduct the static elastoplastic analysis respectively. After calculationand analysis, firstly, get the collapse resistance calculation diagrams of every model; next,judge the seismic performance of structure under the severe earthquake throughcalculating their performance points, interlayer displacement angles and the plastic hingedistributions; then, compare their steel content. Through a comprehensive comparison ofseismic performance and steel content under the severe earthquake, conduct theoptimization design for the structure.In addition, a school building with five floors of Mian Yang is selected, whosefortification intensity is9and the basic earthquake acceleration is0.4g. Two models ofthe frame structure and reinforced concrete two-way braced frame structure are built.Through the comparison between the size of anti-collapse properties and steel contentcontrast two models under rare earthquake to optimize the design of the original structure.After comprehensive analysis, concrete bidirectional support frame structure under rareearthquake comprehensive performance better than the frame structure.