超长混凝土框架柱内力行波效应研究

Research on seismic responses of frame columns' interforce of concrete superlong structure considering traveling wave effect

利用ANSYS软件，并采用一致与非一致Taft波，对长度为105-210m的3层混凝土框架作了大规模弹性时程分析。在此基础上，得到了柱弹性内力行波效应变化规律：最大内力出现时间后移；柱剪力随结构长度的增大而减小；柱弯矩随结构长度的增大其1，2层柱弯矩值会增大、3层柱弯矩值会减小；柱轴力随结构长度的增大，变化的幅度不超过1％；在200～500m／s波速范围内，波速改变对柱内力影响可忽略，变化幅度不超过2％。

With the help of ANSYS,the time history analysis for the behavors of a series of large models of three floors fram structure ranging from 105- 210 meters, which are subjected to uniform and non-uniform excitation of TAFT has been done. Based on these analysises,the varying regulations of the fram columns＇ elastic interforces, considering travling wave effect, has been gained： the appearing times of the largest interforces are postponed; columns＇ shears decrease with the increasing of structure length; the columns＇ moments of the first and the second floor are enlarged, while the thirst floor＇ columns＇ are reduced as the same reason; columns＇ axial forces are nearly not changed, as the largest one is less than 1% with the change of length;the affact of speed＇ changing could be ignored,which is not more than 2% ,with the scope of 200-500 m/s in this paper.