高层钢筋砼结构整体稳定与倾覆的结构计算

An Analysis of Structural Calculation of Overall Stability and Overturning of High Reinforced Concrete Structure

根据《高层建筑砼结构技术规程JGJ3-2002》,对在水平风荷载或水平地震荷载作用下,影响高层结构稳定的因素主要是结构的刚重比,刚重比的最低要求就是结构的稳定性要求。当结构的刚重比小于最低要求时,结构的重力P—V效应会急剧增加,可能会导致结构整体失稳。本文通过结构的临界荷载结构在考虑P—V效应及不考虑P—V效应作用下,结构的侧移和层间位移的计算,确定如何控制结构的刚重比,使P—V效应增幅小于某一临界值,以确保结构的稳定。

According to ＂Technical Regulations of High Reinforced Concrete Structure JGJ3-2002＂ ,under level wind load and level seismic load,the ratio of rigidity-to-gravity is the major element to influence high reinforced concrete structure.Its minimum requirement is the stability of the structure.When the ratio of rigidity-to-gravity of the struc- ture is less than the minimum requirement,the structural gravity P-V effect will increases abruptly and leads to overall structural instability.Through the calculation of structural critical load,and structural sidesway and interstory drift,with and without consideration of P-V effect,the paper explores how to control the the ratio of rigidity-to-gravity and make the amplification of P-V effect less than a critical value and keep the structure steady.