本文選題：銹蝕 + 單階鋼柱�。� 參考：《鋼結(jié)構(gòu)》2016年12期

【摘要】：考慮局部銹蝕區(qū)域截面損失和材料性能退化,借助ABAQUS對(duì)非對(duì)稱截面單階柱進(jìn)行低周反復(fù)性能非線性分析,得到常軸力、反復(fù)水平荷載作用下,不同銹蝕部位、不同銹蝕深度單階柱的滯回性能變化規(guī)律。結(jié)果表明,銹蝕深度D變化的影響為:腹板D4 mm,翼緣和腹板同時(shí)銹蝕D2 mm時(shí),銹蝕越深,材性退化越明顯,階形柱水平極限承載力、抗側(cè)剛度、滯回耗能和延性等降低較大;翼緣D≤5 mm、腹板D≤4 mm、翼緣和腹板同時(shí)銹蝕D≤2 mm時(shí),隨著D的增加,滯回性能各指標(biāo)均有所降低,但變化幅度不明顯,對(duì)階形柱恢復(fù)力特性影響小;因階形柱下柱兩分肢截面不對(duì)稱、偏心荷載及荷載-位移(P-Δ)效應(yīng),使構(gòu)件在反向加載時(shí)延性劣化突出。
[Abstract]:Considering the loss of section and the degradation of material performance in the local corrosion region, the low cycle repeated nonlinear analysis of asymmetric section single step column is carried out by means of ABAQUS, and the different corrosion sites under constant axial force and repeated horizontal load are obtained.The hysteretic behavior of single column with different corrosion depth is studied.The results show that the effect of the corrosion depth D is as follows: the web D 4 mm and the flange and web corrosion D 2 mm at the same time, the deeper the corrosion is, the more obvious the material degradation is, and the lower the horizontal ultimate bearing capacity, the lateral stiffness, the hysteretic energy dissipation and the ductility of the step column.When the flange D 鈮，

本文編號(hào)：1749458