| Frame shear wall structure combines the advantages of frame and shearwall, shear wall mainly bear the horizontal load, frame bearing vertical load,both force clear and reasonable, foster strengths and circumvent weaknesses, soit is widely used in high-rise buildings. High rise building construction period islong, investment is big, how to get structure optimal plan and can reduce thecost in design, it has been the design personnel hard. Domestic former practiceis the design staff according to the previous experience of the design and then rereview the form, through continuous calculation and correction, so that it meetsthe specifications. But the feasibility of the scheme lies in the design of thestructure.. At present, the reasonable number of shear wall is put forward byresearchers.. Such as the optimization of the earthquake fortification intensityand the optimization of the minimum seismic effect, the number of the shearwall is not the most reasonable.. So this paper takes the design and analysissoftware MIDAS/Gen as a tool, through the establishment is located in8 degree (0.2g)District12story frame shear wall structure based on shear wallreasonable stiffness range, on three different positions of shear wall structuremodel analysis. The main content of this paper is:(1) Through repeated load test, with frame column and shear span relativelylarge frame-shear wall structure stress analysis. Experimental results show thatthe belt frame column can delay the stiffness degradation, and the frames andshear walls in the elastic deformation of internal force distribution changes little,non elastic stage two changes, the shear wall stiffness degradation significantly.(2) Through of frame-shear wall structure of collaborative workingprinciple of theoretical analysis, to establish a cooperative differential equation,the set value of the stiffness characteristics, derives the structure of the invertedtriangle load displacement, internal force and distribution curve. Shear walloptimal stiffness interval.(3) Finally, based on vertex displacement limit, the establishment ofmathematical model of the optimal quantity of shear wall, infers the beststiffness the expression of shear wall is derived, combined with engineeringexample, selected three kinds of shear wall model, the model in the cycle, layerdisplacement, columns and shear walls, shear distribution data were comparedusing Midas software, choose the best design scheme. the optimization methodcan reasonably determine the stiffness and number of shear wall. |
