發(fā)布時(shí)間：2018-06-14 11:46

  本文選題：弱軸連接 + 蒙皮板��； 參考：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：節(jié)點(diǎn)域箱形加強(qiáng)式工字形柱弱軸連接作為一種新型的連接形式,在單調(diào)荷載試驗(yàn)中已被證明具有良好的力學(xué)性能,為進(jìn)一步探究其在循環(huán)荷載下的力學(xué)性能,本文進(jìn)行了邊框架節(jié)點(diǎn)在低周反復(fù)荷載作用下的ABAQUS有限元模擬研究。本文重點(diǎn)研究了標(biāo)準(zhǔn)型節(jié)點(diǎn)和蓋板加強(qiáng)型節(jié)點(diǎn),通過(guò)一系列有限元的變參數(shù)分析和數(shù)據(jù)處理,研究了節(jié)點(diǎn)和關(guān)鍵構(gòu)件的破壞機(jī)理、連接焊縫的應(yīng)力分布、M??曲線、剛度分類、剛度和延性的匹配等問(wèn)題,同時(shí)還針對(duì)蓋板加強(qiáng)型節(jié)點(diǎn)的不足進(jìn)行了改進(jìn)分析。得到的結(jié)論主要如下:1.標(biāo)準(zhǔn)型節(jié)點(diǎn)和蓋板加強(qiáng)型節(jié)點(diǎn)均能達(dá)到強(qiáng)節(jié)點(diǎn)域的特點(diǎn),在有側(cè)移框架中均屬于半剛性連接,兩種節(jié)點(diǎn)的梁翼緣連接焊縫處的應(yīng)力沿梁寬方向均呈現(xiàn)不利的V型分布;蓋板可以控制塑性鉸遠(yuǎn)離連接處,能顯著提高節(jié)點(diǎn)的初始轉(zhuǎn)動(dòng)剛度和承載力,并有著較為理想的延性和耗能能力。2.節(jié)點(diǎn)在較高的軸壓比下有成為強(qiáng)柱弱梁的趨勢(shì),并且抗震性能也會(huì)大大劣化,新型連接節(jié)點(diǎn)的軸壓比應(yīng)控制在0.6以內(nèi);3.相對(duì)于高度,蒙皮板的厚度對(duì)節(jié)點(diǎn)的剛度和延性有更直接和明顯的影響,應(yīng)保證最小的蒙皮板厚度來(lái)確保節(jié)點(diǎn)具有足夠的轉(zhuǎn)動(dòng)剛度和塑性轉(zhuǎn)動(dòng)能力。3.蓋板長(zhǎng)度和厚度對(duì)節(jié)點(diǎn)性能影響較大,過(guò)大或過(guò)小都會(huì)降低節(jié)點(diǎn)的抗震性能,研究證明蓋板長(zhǎng)度和厚度分別取0.5倍的梁截面高度和翼緣厚度時(shí),節(jié)點(diǎn)的性能較為理想;4.梁的剛度增大會(huì)提高節(jié)點(diǎn)的承載力,柱的剛度增大則會(huì)提高節(jié)點(diǎn)的轉(zhuǎn)動(dòng)剛度,因此,梁柱線剛度比應(yīng)該控制在一定的范圍內(nèi);5.由于蒙皮板形成的箱形構(gòu)造使節(jié)點(diǎn)域大大加強(qiáng),因此,柱子繞強(qiáng)軸彎曲不會(huì)明顯降低弱軸連接的受力性能,存在強(qiáng)軸連接,弱軸連接仍然有較好的抗震性能。6.梁翼緣板式連接可以明顯減小梁翼緣連接焊縫的尺寸,并能顯著的改善連接焊縫邊緣處的應(yīng)力集中;而在蒙皮板后加焊豎向隔板可以增強(qiáng)節(jié)點(diǎn)的剛度,放松對(duì)蒙皮板厚度的要求,其也能促使應(yīng)力從連接焊縫的邊緣向中間區(qū)域轉(zhuǎn)移;最后,對(duì)本文內(nèi)容的后續(xù)研究進(jìn)行了展望,給出了后續(xù)研究的內(nèi)容及方向。
[Abstract]:As a new type of connection, the box reinforced I-shaped column weakly connected in nodal domain has been proved to have good mechanical properties in monotone load tests, in order to further explore its mechanical properties under cyclic load. In this paper, Abaqus finite element simulation of edge frame joints under low cyclic loading is carried out. This paper focuses on the study of standard joints and slab reinforced joints. Through a series of finite element variable parameter analysis and data processing, the failure mechanism of joints and key components is studied, and the stress distribution of weld joint is analyzed. The problems of curve, stiffness classification, stiffness and ductility matching are also analyzed. The main conclusions are as follows: 1. Both the standard joint and the strengthened cover joint can achieve the characteristics of strong joint domain. They are semi-rigid connections in the frame with lateral displacement, and the stress distribution of the weld seam at the flange joint of the two kinds of joints is unfavorable along the beam width direction. The cover plate can control the plastic hinge far away from the joint, can significantly improve the initial rotational stiffness and bearing capacity of the joint, and has an ideal ductility and energy dissipation capacity of .2. The joint has the tendency to become a strong column and weak beam at higher axial compression ratio, and the seismic performance will deteriorate greatly. The axial compression ratio of the new connection should be controlled within 0.6 ~ 3. Compared with the height, the thickness of the sheathed plate has more direct and obvious influence on the stiffness and ductility of the joint. The minimum thickness of the sheathed plate should be ensured to ensure that the joint has sufficient rotational stiffness and plastic rotation ability. The length and thickness of cover plate have a great influence on the performance of the joint, too large or too small will reduce the seismic performance of the joint. It is proved that when the length and thickness of the cover plate are 0.5 times the height of beam section and the thickness of flange respectively, the performance of the joint is better than that of the joint. The stiffness of the beam will increase the bearing capacity of the joint, and the stiffness of the column will increase the rotational stiffness of the joint. Therefore, the Liang Zhu line stiffness ratio should be controlled within a certain range of 5. Due to the box structure formed by the sheathed plate, the joint domain is greatly strengthened, so the bending of the column around the strong axis does not obviously reduce the mechanical properties of the weak axis connection, and there is a strong axis connection, and the weak axis connection still has good seismic performance. 6. The beam-flange plate connection can significantly reduce the size of the beam-flange joint weld seam, and can significantly improve the stress concentration at the weld edge of the beam-flange connection, and the stiffness of the joint can be enhanced by adding the welded vertical diaphragm after the sheathed plate. Relaxation of the thickness of the skin plate can also promote the stress transfer from the edge of the weld joint to the middle zone. Finally, the future research of this paper is prospected, and the content and direction of the follow-up research are given.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU391

【共引文獻(xiàn)】

相關(guān)博士學(xué)位論文 前10條

1 許蘭貴;變壁厚大錐度薄壁鋁罐成形關(guān)鍵技術(shù)的研究[D];華南理工大學(xué);2010年

2 都愛(ài)華;框架結(jié)構(gòu)移位托換節(jié)點(diǎn)受力機(jī)理的研究[D];山東大學(xué);2010年

3 姜莞;商用車動(dòng)力總成懸置性能模擬與疲勞壽命預(yù)測(cè)研究[D];吉林大學(xué);2011年

4 王超飛;黑斑側(cè)褶蛙和中華大蟾蜍的特征、功能、力學(xué)特性及其仿生分析[D];吉林大學(xué);2011年

5 鈕鵬;碳纖維增強(qiáng)壓彎鋼構(gòu)件穩(wěn)定性研究[D];大連海事大學(xué);2011年

6 鄭妮娜;裝配式構(gòu)造柱約束砌體結(jié)構(gòu)抗震性能研究[D];重慶大學(xué);2010年

7 孫立強(qiáng);超軟吹填土地基真空預(yù)壓理論及模型試驗(yàn)的研究[D];天津大學(xué);2010年

8 劉克瑾;天津?yàn)I海新區(qū)新近吹填軟黏土的流變特性及非線性流變本構(gòu)模型研究[D];天津大學(xué);2010年

9 王琨;套建增層預(yù)應(yīng)力鋼骨混凝土框架抗震性能試驗(yàn)與分析[D];哈爾濱工業(yè)大學(xué);2010年

10 王曉宏;碳纖維/樹(shù)脂單絲復(fù)合體系界面力學(xué)行為的研究[D];哈爾濱工業(yè)大學(xué);2010年

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本文編號(hào)：2017269