本文關(guān)鍵詞：設(shè)置墊板的鋼結(jié)構(gòu)梁-柱T形件連接節(jié)點(diǎn)受力性能分析　出處：《福州大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 梁-柱連接 T形件連接 有限元 墊板 初始轉(zhuǎn)動(dòng)剛度 極限承載力

【摘要】：梁、柱之間的連接節(jié)點(diǎn)是鋼框架結(jié)構(gòu)中的關(guān)鍵部位,傳統(tǒng)T形件連接節(jié)點(diǎn)的設(shè)計(jì)思想是在框架梁中形成塑性鉸,以此消耗能量,但節(jié)點(diǎn)破壞后修復(fù)非常困難,且成本較高。為此研究者提出了設(shè)置墊板的梁-柱T形件連接節(jié)點(diǎn),該節(jié)點(diǎn)是一種新型節(jié)點(diǎn),其主要特點(diǎn)是：將與梁下翼緣相連的T形件作為耗能元件,在T形件翼緣和柱之間設(shè)置墊板,使T形件翼緣能向正反兩個(gè)方向發(fā)生彎矩屈服。梁上翼緣作為轉(zhuǎn)動(dòng)中心不發(fā)生較大位移從而保護(hù)主體結(jié)構(gòu)不發(fā)生破壞,耗能元件位于梁下翼緣,易于更換,便于修復(fù)。本文主要研究設(shè)置墊板的T形件連接節(jié)點(diǎn)在單向和循環(huán)加載下的力學(xué)性能,主要工作和成果如下：(1)采用有限元軟件ABAQUS對(duì)相似T形件連接和設(shè)置墊板的T形件連接節(jié)點(diǎn)進(jìn)行數(shù)值模擬,并與試驗(yàn)結(jié)果對(duì)比,證明了有限元模型的有效性及適用性,并探討了此新型連接節(jié)點(diǎn)的破壞模式,關(guān)鍵部位的應(yīng)力分布和發(fā)展規(guī)律。分析結(jié)果表明,設(shè)置墊板的下T形件受拉時(shí),節(jié)點(diǎn)在下T形件翼緣根部和螺栓中心線處形成塑性鉸；受壓時(shí),節(jié)點(diǎn)在下T形件翼緣根部和墊板邊緣處形成塑性鉸。破壞時(shí),最大受力和變形均發(fā)生在下T形件翼緣根部,其他構(gòu)件受力相對(duì)較小,能保證節(jié)點(diǎn)以梁上翼緣為轉(zhuǎn)動(dòng)中心從而保護(hù)主體結(jié)構(gòu)不至破壞。(2)采用ABAQUS軟件分析了16個(gè)系列共40個(gè)設(shè)置墊板的T形件連接節(jié)點(diǎn)試件的靜力性能及滯回性能,研究了各幾何參數(shù)和物理參數(shù)對(duì)此新型節(jié)點(diǎn)力學(xué)性能的影響。計(jì)算結(jié)果表明：下T形件翼緣厚度、鋼梁截面高度和下T形件翼緣上螺栓的豎向間距對(duì)設(shè)置墊板的梁柱節(jié)點(diǎn)初始剛度和承載力影響顯著；墊板寬度僅影響此新型連接節(jié)點(diǎn)的負(fù)向受力性能；上T形件翼緣厚度、鋼梁和鋼柱翼緣及腹板厚度、螺栓預(yù)緊力及直徑、摩擦系數(shù)等其他因素對(duì)設(shè)置墊板的新型連接節(jié)點(diǎn)的力學(xué)性能影響較小。(3)采用組件法,綜合考慮了T形件變形(包括T形件翼緣受彎、螺栓受拉、T形件腹板拉伸)、柱腹板變形和柱翼緣變形,提出了適用于此新型梁柱連接節(jié)點(diǎn)初始轉(zhuǎn)動(dòng)剛度的理論計(jì)算模型。通過(guò)算例驗(yàn)證,證明了該模型的可靠性。最后,對(duì)設(shè)置墊板的梁-柱T形件連接節(jié)點(diǎn)的設(shè)計(jì)提出了相關(guān)建議。
[Abstract]:The connection joint between beam and column is the key part of steel frame structure. The traditional design idea of T-shaped joint is to form plastic hinge in frame beam to consume energy, but it is very difficult to repair the joint after failure. Therefore, a new type of beam-column T-joint is proposed. The main characteristic of the joint is that the T-shaped part connected with the flange of the beam is used as the energy dissipation element. In order to protect the main structure from failure, the flange of the T-shaped piece can be bent to yield in both positive and negative directions by setting a cushion plate between the flange of the T-shaped piece and the column. The upper flange of the beam does not displace as the center of rotation so as to protect the main structure from damage. The energy dissipation element is located at the flange of the beam, which is easy to be replaced and repaired. In this paper, the mechanical properties of T-shaped joint with gasket are studied under unidirectional and cyclic loading. The main work and results are as follows: 1) numerical simulation of T-shaped joint with similar T-shaped parts and T-shaped joints with gasket is carried out by using finite element software ABAQUS, and the results are compared with the experimental results. The validity and applicability of the finite element model are proved, and the failure mode of the new joint, the stress distribution and the development law of the key parts are discussed. The joint forms a plastic hinge at the flange root of the lower T-shaped piece and at the central line of the bolt. Under compression, the joints form plastic hinges at the flange root and the edge of the pad of the lower T-shaped part. During the failure, the maximum force and deformation occur at the root of the flange of the lower T-shaped piece, while the other members are relatively small. It can ensure that the joint takes the upper flange of the beam as the center of rotation so as to protect the main structure from damage. The static and hysteretic properties of 16 series of 40 T-joint specimens with gaskets were analyzed by ABAQUS software. The effects of geometric and physical parameters on the mechanical properties of the new joint are studied. The results show that the flange thickness of the lower T-shaped part is lower. The cross-section height of steel beam and the vertical spacing of bolt on flange of lower T-shaped piece have significant influence on the initial stiffness and bearing capacity of beam-column joint with cushion plate. The width of the pad only affects the negative force performance of the new connection. Flange thickness of upper T-shaped parts, flange and web thickness of steel beam and column, pretightening force and diameter of bolt. The friction coefficient and other factors have little influence on the mechanical properties of the new connection joints with gasket. The component method is used to consider the deformation of T-shaped parts (including flange bending and bolt tension). This paper presents a theoretical calculation model for the initial rotational stiffness of the new beam-column connection joint, which is suitable for T-shaped web tension, column web deformation and column flange deformation. The reliability of the model is proved. Finally, some suggestions are put forward for the design of the beam-column T-shaped joint with cushion plate.
【學(xué)位授予單位】：福州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU391

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