發(fā)布時(shí)間：2018-02-02 21:33

  本文關(guān)鍵詞： 鋼管內(nèi)套筒 梁柱節(jié)點(diǎn) 滯回性能 耗能能力 T型件　出處：《青島理工大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：近年來(lái),由于矩形鋼管柱具有截面慣性矩大、整體穩(wěn)定性好、便于施工等優(yōu)點(diǎn),得到了越來(lái)越廣泛地應(yīng)用,通常矩形鋼管柱與H型鋼梁采用焊接連接,但焊接連接易發(fā)生脆斷、且焊縫質(zhì)量受施工條件影響,因此能夠大幅減少現(xiàn)場(chǎng)施焊工作量的裝配式連接形式逐漸得到了人們的重視。目前矩形鋼管柱與鋼梁多采用套筒進(jìn)行裝配式連接,而國(guó)內(nèi)外專(zhuān)家已對(duì)外套筒連接形式做了大量研究,但對(duì)具有建筑立面造型美觀、施工周期短等優(yōu)點(diǎn)的內(nèi)套筒連接節(jié)點(diǎn)研究較少,因此對(duì)內(nèi)套筒連接節(jié)點(diǎn)受力情況的研究是十分必要的。本文基于上述考慮,利用ANSYS有限元軟件建立鋼管內(nèi)套筒-T型件梁柱連接節(jié)點(diǎn)模型,觀察邊柱節(jié)點(diǎn)在梁端位移循環(huán)荷載作用下的破壞形式,對(duì)其表現(xiàn)出的滯回性能、骨架曲線(xiàn)和承載力、耗能能力等力學(xué)性能進(jìn)行分析。并通過(guò)分別改變鋼管內(nèi)套筒的厚度和長(zhǎng)度,研究?jī)?nèi)套筒幾何參數(shù)的變化對(duì)節(jié)點(diǎn)連接件應(yīng)力分布的影響,最后結(jié)合工程實(shí)例,對(duì)該種節(jié)點(diǎn)在鋼框架中的受力進(jìn)行設(shè)計(jì)和驗(yàn)算。研究結(jié)果表明:在往復(fù)荷載作用下,鋼管內(nèi)套筒-T型件梁柱連接節(jié)點(diǎn)表現(xiàn)出良好的滯回性能,試件滯回曲線(xiàn)呈“弓”型,位移加載過(guò)程中由于高強(qiáng)度螺栓滑移影響,試件的滯回曲線(xiàn)存在一定程度地“捏縮”現(xiàn)象,最終由于T型連接件翼緣產(chǎn)生較大塑性變形,導(dǎo)致節(jié)點(diǎn)破壞;隨鋼管內(nèi)套筒厚度增加,節(jié)點(diǎn)剛度增大,試件的滯回性能提升明顯,屈服承載力和極限承載力也隨之增加,在往復(fù)荷載作用下對(duì)動(dòng)能的消耗能力有所增強(qiáng),高強(qiáng)度對(duì)拉螺栓的拉力值逐漸增大,T型件塑性變形減小,內(nèi)套筒與T型件的應(yīng)力水平呈現(xiàn)降低趨勢(shì);隨鋼管內(nèi)套筒長(zhǎng)度增加,高強(qiáng)度對(duì)拉螺栓豎向間距增大,對(duì)T型件的約束作用減弱,造成T型件翼緣中部彎曲變形和端部翹曲變形,塑性變形增大,應(yīng)力值減小,試件的屈服承載力和極限承載力均有所降低,節(jié)點(diǎn)的變形能力增大,對(duì)動(dòng)能的消耗能力降低,因此建議在滿(mǎn)足連接要求的前提下,內(nèi)套筒長(zhǎng)度盡量減小,厚度大于外柱壁2mm,此時(shí)節(jié)點(diǎn)用料經(jīng)濟(jì)且力學(xué)性能較好。通過(guò)驗(yàn)算,該種節(jié)點(diǎn)形式可以有效地將梁端荷載傳遞給柱子,受力安全可靠。
[Abstract]:In recent years, rectangular steel tube column has been more and more widely used because of its large moment of inertia, good overall stability, easy construction and so on. Usually, welded connection between rectangular steel tube column and H-shaped steel beam is adopted. However, the welded joints are prone to brittle fracture, and the quality of the weld is affected by the construction conditions. Therefore, people pay more and more attention to the assembly connection which can greatly reduce the workloads of welding on the spot. At present, most of the rectangular steel pipe columns and steel beams are assembled by sleeve. Experts at home and abroad have done a lot of research on the form of external sleeve connection, but there is less research on the internal sleeve connection joint which has the advantages of beautiful facade shape and short construction period. Therefore, it is very necessary to study the stress situation of the inner sleeve connection joint. Based on the above considerations, the ANSYS finite element software is used to establish the Liang Zhu connection joint model of the steel tube inner sleeve-T part. Observe the failure form of side column joint under the action of beam end displacement cyclic load, and show hysteretic performance, skeleton curve and bearing capacity for it. By changing the thickness and length of the inner sleeve of the steel tube, the influence of the geometric parameters of the inner sleeve on the stress distribution of the joint joint is studied. Finally, an engineering example is given. The stress design and checking calculation of this kind of joint in steel frame are carried out. The results show that: under the action of reciprocating load, Liang Zhu joint of inner sleeve of steel pipe shows good hysteretic performance. The hysteretic curve of the specimen is of "bow" type, and the hysteretic curve of the specimen is "pinched" to a certain extent due to the effect of high strength bolt slip during the displacement loading. Finally, due to the large plastic deformation of the flange of T-joint, the joint is destroyed. With the increase of the inner sleeve thickness, the stiffness of the joints increases, the hysteretic performance of the specimen increases obviously, the yield bearing capacity and ultimate bearing capacity also increase, and the consumption capacity of kinetic energy increases under reciprocating load. The tensile force value of high strength tensile bolt increases gradually and the plastic deformation of T-shaped part decreases, while the stress level of inner sleeve and T-shaped part decreases. With the increase of the inner sleeve length of the steel tube, the vertical spacing of the tension bolt increases with the high strength, and the restraint effect on the T-shaped part is weakened, which results in the bending deformation in the middle flange, warping deformation at the end of the flange of the T-shaped part, and the increase of the plastic deformation. When the stress value decreases, the yield bearing capacity and ultimate bearing capacity of the specimens are decreased, the deformation capacity of the joints is increased, and the consumption capacity of kinetic energy is reduced. Therefore, it is suggested that the joint should be satisfied with the requirements of connection. The length of the inner sleeve is as small as possible, the thickness is more than 2 mm of the outer column wall, and the joint is economical in material and good in mechanical performance. Through checking calculation, this kind of joint form can effectively transfer the load from the end of the beam to the column. The force is safe and reliable.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU392.3

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