- 摘 要
-
（1 長安大學(xué)建筑工程學(xué)院， 西安 710061； 2 長安大學(xué)公路學(xué)院， 西安 710064）
［摘要］在外方內(nèi)圓復(fù)式鋼管混凝土柱-H型鋼梁節(jié)點(diǎn)擬靜力試驗(yàn)研究基礎(chǔ)上，建立了組合節(jié)點(diǎn)的非線性有限元模型，研究了組合節(jié)點(diǎn)的滯回曲線、骨架曲線和破壞形態(tài)，分析了節(jié)點(diǎn)核心區(qū)水平端板、錨固腹板、豎向肋板以及內(nèi)外鋼管的應(yīng)力分布，探討了此類組合節(jié)點(diǎn)的傳力機(jī)制。結(jié)果表明，建立的非線性有限元模型能較好地反映組合節(jié)點(diǎn)在低周往復(fù)荷載作用下的力學(xué)性能，節(jié)點(diǎn)核心區(qū)的應(yīng)力較大值出現(xiàn)在水平端板變截面處和錨固腹板加肋處，鋼梁翼緣的應(yīng)力通過水平端板傳遞給錨固腹板和豎向肋板，豎向肋板的應(yīng)力進(jìn)一步傳遞給外方鋼管柱腹板，而錨固腹板的應(yīng)力則傳遞給內(nèi)外鋼管柱翼緣以及鋼管內(nèi)混凝土中，且錨固腹板與豎向肋板表現(xiàn)出很好的協(xié)同工作性能。試驗(yàn)及有限元分析均表明此類新型組合節(jié)點(diǎn)抗震性能較好、應(yīng)力分布合理、傳力路徑清晰，可用于抗震設(shè)防區(qū)的建筑中。
［關(guān)鍵詞］復(fù)式鋼管混凝土柱-鋼梁節(jié)點(diǎn)； 滯回曲線； 骨架曲線； 破壞形態(tài)； 應(yīng)力分布； 傳力機(jī)制
中圖分類號：TU398-9文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)15-0037-07
Stress distribution and force-transferring mechanism of connections between concrete-filled double steel tubular column and steel beam
Zhang Dongfang1, Zhao Junhai1, He Shuanhai2, Zhu Qian1
(1 School of Civil Engineering, Chang′an University, Xi′an 710061, China;2 Highway School, Chang′an University, Xi′an 710064, China)
Abstract:A nonlinear finite element analysis was carried out to simulate the behaviour of the specimens based on the experimental research on the connections between concrete-filled double steel tubular (CFDST) column and steel beam. The hysteretic behaviour, skeleton curves, failure modes of the composite connections were analyzed. The stress distribution of the horizontal end plate, the anchorage plate, the vertical stiffeners, the inner and outer steel tubes were also discussed. Then the force-transferring mechanism of the composite connections were investigated. The results show that the finite element model can better reflect the mechanical properties of the composite connections under low cycle loads. The high stress appears at the variable cross-section of the horizontal end plate and at the rib of the anchorage plate. The stress at the flange of steel beams is transmitted to the anchorage plate and the vertical stiffeners through the horizontal end plate. And then, the stress of the vertical stiffeners is transferred to the web of the outer steel tube. At the meanwhile, the stress of the anchorage plate is transmitted to the flanges of the inner and outer steel tubes and the concrete. Above all, the anchorage plate and the vertical stiffeners show favourable cooperative performance. The new types of composite connections have better seismic behaviour and excellent force-transferring mechanism, which can be used in the construction of antiearthquake fortification zone.
Keywords:connections between CFDST column and steel beam; hysteretic curves; skeleton curves; failure modes; stress distribution; force-transferring mechanism
*國家自然科學(xué)基金項(xiàng)目（51508028），中國博士后科學(xué)基金項(xiàng)目（2014M562357，2015M580803），陜西省自然科學(xué)基金（2018JQ5119），陜西省博士后科研項(xiàng)目，中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助（300102288112，310828173402）。
作者簡介：張冬芳，博士，講師，Email: zhangdongfang_2008@163.com。
- 下載地址
-
