基于ABAQUS的復(fù)式圓鋼管柱滯回性能分析

馬江萍

摘 要：為研究分析復(fù)式圓鋼管混凝土柱的滯回性能，利用ABAQUS建立了混凝土與鋼管強(qiáng)度、彈性模量均相同的9個(gè)模型，對比分析了剪跨比、軸壓比對模型極限承載力與延性系數(shù)的影響。結(jié)果表明：復(fù)式圓鋼管混凝土柱在剪跨比相同時(shí)，隨軸壓比增大模型的極限承載力逐漸減小，延性系數(shù)呈先增大后減小的發(fā)展趨勢;在軸壓比相同時(shí)，隨剪跨比增大模型的極限承載力大幅遞減，模型的延性系數(shù)在軸壓比為0.4時(shí)對剪跨比不敏感，在軸壓比為0.2時(shí)有近25%的提高，但延性系數(shù)在軸壓比為0.6時(shí)大幅下降。

關(guān)鍵詞：復(fù)式圓鋼管;滯回性能;剪跨比;軸壓比;有限元分析

中圖分類號：TU398.9 文獻(xiàn)標(biāo)識碼：A 文章編號：1001-5922（2022）04-0175-05

Abstract： In order to study and analyze the hysteretic behavior of the compound concrete-filled circular steel tube column， 9 models with the same strength and elastic modulus of concrete and steel tube were established by ABAQUS， and the shear-span ratio and axial compression ratio were compared with the ultimate bearing capacity and ductility coefficient of model. The results show that when the shear-span ratio of the compound round steel tube column is the same， the ultimate bearing capacity of the model gradually decreases with the increase of the axial compression ratio， and the ductility coefficient shows a development trend of first increasing and then decreasing. When the axial compression ratio is the same， as the shear-span ratio increases， the ultimate bearing capacity of the model decreases significantly. When the axial compression ratio is 0.4， the ductility coefficient of the model is not sensitive to the shear-span ratio. When the axial compression ratio is 0.2， there is an increase of nearly 25%. However， when the axial compression ratio is 0.6， the ductility coefficient drops significantly.

Key words：? compound round steel pipe; hysteretic behavior; shear-span ratio; axial compression ratio; finite element analysis

復(fù)式鋼管混凝土柱兼具鋼管與混凝土的優(yōu)勢[1-3]，且內(nèi)外鋼管作為混凝土施工的模板、混凝土為鋼管提供側(cè)向支撐，因此在建筑中的應(yīng)用愈加廣泛。對于復(fù)式鋼管混凝土柱構(gòu)件的研究，國內(nèi)外學(xué)者在理論研究、試驗(yàn)分析以及數(shù)值模擬推演等方面已做了大量工作[4-10]。

國內(nèi)學(xué)者蔡紹懷等[11]基于2種截面形式（同心配置的三重鋼管、鋼管束）的復(fù)式鋼管混凝土柱試驗(yàn)研究結(jié)果，分析了復(fù)式鋼管混凝土柱的力學(xué)性能和極限承載力，推導(dǎo)并計(jì)算驗(yàn)證了2種截面形式復(fù)式鋼管混凝土柱的極限承載力公式。張玉芬[12]分析了4種截面形式（內(nèi)圓鋼管、型鋼、CFRP筒增強(qiáng)型鋼管及復(fù)式空心鋼管）的復(fù)式鋼管混凝土柱，驗(yàn)算了4種截面形式的復(fù)式鋼管混凝土柱軸壓剛度、抗震性能，建立了統(tǒng)一可行的剛度和承載力計(jì)算方法。……