Optimization And Design Of Shear Wall For High-rise Shear Wall Structure

High-rise buildings have many kinds and different forms.As a high-rise structure,high-rise shear wall structure is widely used in residential buildings because of its good lateral resistance.At present,the research on high-rise shear wall structure mostly stays at the qualitative level,and the quantitative research is relatively few.In the structural design,it is not enough to know only the qualitative things,but also the quantitative things.Only by knowing these,we can design better.In this paper,we study their mechanical performance,economic performance and layout optimization of shear wall respectively through two high-rise shear wall structure examples.I discuss the relationship between the lateral stiffness and various factors and the influence capacity,and the variation and growth rate of beam steel content,wall steel content,wall column steel content and total steel content with periodic reduction coefficient,intensity,number of stories and displacement angle between stories.Finally,I summarize some problems of optimal layout of shear walls.The main conclusions are as follows:1)With the increase of concrete strength grade,when concrete strength grade is from C25 to C40,the ratio of rigidity to gravity increases by 3.65%-10.36%,and the ratio of displacement angle increases by-1.98%--6.08%,while the ratio of shear weight does not change much.In the design,by adjusting the concrete grade,it has little significance to the shear-weight ratio,about 10% to the maximum rigid-weight ratio,and about 6% to the maximum displacement angle.2)With the increase of layers,when the number of layers increases from 6 to 12,18 and 24,the specific growth rates of rigid weight are-68.19%,82.23% and-88.98%,the specific growth rates of shear weight are-44.33%,59.53% and-68.95%,and the growth rates of displacement angle are 38.46%,61.53% and 99.37%.The results show that the rigidity-weight ratio and shear-weight ratio change most significantly with the increase of layers,but then decrease,but the displacement angle changes more significantly.It shows that the displacement angle varies greatly with the increase of a certain number of layers.3)With the increase of wall thickness,when the wall thickness changes from 200 to 350,the specific growth rate of rigid weight is 6.59%-27.68%,the specific growth rate of shear weight is 4.42%-51.38%,and the growth rate of displacement angle is-3.58%-23.48%.However,when the wall thickness changes from 300 to 350,the growth rate of displacement angle decreases from-5.33% to-23.48%,the growth rate of rigidity-weight ratio increases from 9.60% to 27.68%,and the growth rate of shear-weight ratio increases from 11.05% to 51.38%,the whole data shows a sudden change.4)The amount of steel used varies with the increase of cycle reduction coefficient.When the cycle reduction coefficient is from 0.8 to 0.95,the total steel content increases from-3.45% to 5.08%.For each component,the steel content of the beam changes the most,and its growth rate reaches-11.73%,followed by the wall column,the wall is the smallest,and the overall steel content decreases linearly.The results show that the periodic reduction coefficient calculated by designers has the greatest effect on the total steel consumption of 5%,and the effect is not significant.5)The amount of steel used varies with the increase of fortification intensity.When the fortification intensity changes from 6 degrees to 7 degrees,the total steel content increases by 7.14%;when the fortification intensity increases from 7 degrees to 8 degrees,the total steel content increases by 33.75%;when the fortification intensity increases from 8 degrees to 9 degrees,the total steel content increases by 93.32%.The results show that in low intensity region(6 degrees to 7 degrees),the amount of steel used does not change much,but in high intensity region(7 degrees to 8 degrees,9 degrees),especially in 8 degrees and 9 degrees,the amount of steel used has a great influence.6)The amount of steel used varies with the increase of layer height.When the floor height increases from 2900 to 3200,the growth rate of total steel content increases from 3.18% to 10.34%.For every 100 mm increase in floor height(equivalent to 3.3% increase in floor height),the increase of total steel consumption is 3.3%,which is basically the same as that of floor height.7)The amount of steel used varies with the increase of interlayer displacement angle.When the interlayer displacement angle increases from 1/1505 to 1/1013,the growth rate of total steel content decreases from-13.7% to-39.00%,which is equivalent to 5.5% reduction of steel consumption for every 1/100 increase of displacement angle.Therefore,proper control of displacement angle in design has a great effect on saving steel consumption.It is suggested that when designing shear wall structure,the displacement angle should be as close as 1/1000 as specified in the code by adjusting the scheme and the number of shear walls.8)By optimizing the layout of shear wall components in the shear wall structure,the torsion effect of the structure can be effectively reduced,and the economic and mechanical performance of the structure can be improved.The optimization of shear wall structure should be carried out step by step according to the order of primary and secondary,layer by layer.