本文選題：狗骨—蜂窩式節(jié)點 + 焊接殘余應(yīng)力��； 參考：《沈陽建筑大學》2014年碩士論文

【摘要】：高層鋼結(jié)構(gòu)建筑中梁柱節(jié)點的合理形式對結(jié)構(gòu)抗震性能來說起很重要的作用。在日本的阪神地震和美國的北嶺地震之后,陸續(xù)出現(xiàn)了眾多抗震性能良好的節(jié)點形式,包括削弱型節(jié)點和加強型節(jié)點兩大類,而在削弱型節(jié)點中狗骨式節(jié)點研究較多,應(yīng)用也較多。狗骨式節(jié)點在受力過程中,在狗骨部位首先形成塑性鉸,從而保護節(jié)點免受脆性破壞,實現(xiàn)了“強節(jié)點,弱構(gòu)件”的設(shè)計思想,近年來被廣泛應(yīng)用到鋼結(jié)構(gòu)框架中。蜂窩梁又是鋼結(jié)構(gòu)工程中興起的一種結(jié)構(gòu)形式,即按照一定的擴高比將梁腹板沿設(shè)計好的路徑切割,然后錯位對接,形成腹板帶有孔洞的蜂窩梁,或者直接在實腹梁腹板上開孔。蜂窩梁以其造型美觀、節(jié)省材料和提高承載力等優(yōu)點同樣受到鋼結(jié)構(gòu)工程師和社會人士的青睞。本文將兩者相結(jié)合,形成狗骨—蜂窩式節(jié)點,研究其在靜力和動力荷載作用下的受力性能,對該種節(jié)點的推廣和應(yīng)用有重要意義,同時為我國制定相關(guān)設(shè)計標準及進一步研究提供參考依據(jù)。本文通過有限元分析的方法,對模型進行了全面仿真模擬,包括熱—結(jié)構(gòu)耦合場模擬、螺栓預(yù)緊模擬、接觸模擬和節(jié)點靜力、動力模擬,涉及了材料非線性、幾何非線性和狀態(tài)非線性。首先,利用間接耦合法進行了狗骨—蜂窩式節(jié)點焊接殘余應(yīng)力的研究,包括溫度場和應(yīng)力場的計算與分析；其次,在以上基礎(chǔ)上研究焊接殘余應(yīng)力對節(jié)點靜力性能的影響；然后在忽略焊接殘余應(yīng)力的情況下,對比研究狗骨式節(jié)點、蜂窩式節(jié)點、狗骨—蜂窩式Ⅰ型節(jié)點和狗骨—蜂窩式Ⅱ型節(jié)點在梁端單調(diào)位移荷載作用下的靜力性能和循環(huán)反復(fù)位移荷載作用下的動力性能。綜合分析有限元計算結(jié)果,可以得出狗骨—蜂窩式節(jié)點與狗骨式節(jié)點比較,在材料用量減少的情況下,節(jié)點承載力和剛度無明顯降低,延性反而提高,同時保留了蜂窩梁造型美觀、便于穿越管線的優(yōu)點。研究中,還重點分析了焊接殘余應(yīng)力的形成過程以及在梁端加載過程中焊縫區(qū)域、剪切板接觸和螺栓預(yù)緊力的變化,進一步突出了狗骨—蜂窩式節(jié)點的優(yōu)勢。
[Abstract]:The reasonable form of beam column joints in high rise steel structures plays an important role in the seismic performance of the structure. After the Kobe earthquake in Japan and the Beilin earthquake in the United States, there have been numerous nodal forms in succession, including two types of weakened joints and reinforced joints, and the dog bone nodes in the weakened joints. In the process of stress, the dog bone type joints first form plastic hinge at the part of the dog bone to protect the node from the brittle failure, and realize the design idea of "strong node and weak component". In recent years, it has been widely applied to the steel structure frame. The honeycomb beam is also a kind of structural form in the steel structure, that is, the structure of the steel structure. In accordance with a certain height ratio, the beam web is cut along the designed path, then misplaced and butted, forming a honeycomb beam with holes in the web, or opening the hole directly on the web of the real abdomen beam. The honeycomb beam is also favored by the steel knot engineers and the social personages for its beautiful shape, material saving and the improvement of the bearing capacity. In combination, the dog bone honeycomb joints are formed to study the force performance of the joints under static and dynamic loads. It is of great significance to the popularization and application of this kind of node. At the same time, it provides reference for the formulation of relevant design standards and further research in China. This paper has carried out a comprehensive simulation of the model through the method of finite element analysis. It includes thermal structure coupling field simulation, bolt pretightening simulation, contact simulation and node static, dynamic simulation, involving material nonlinearity, geometric nonlinearity and state nonlinearity. First, the study of residual stress in the welding of dog bone honeycomb joints is carried out by indirect coupling method, including the calculation and analysis of temperature field and stress field; secondly, The effect of welding residual stress on the static behavior of joints is studied on the basis of the above basis. Then, under the condition of neglecting the residual stress of the welding, the static performance and cyclic reverse reduction of the dog bone, honeycomb, dog bone honeycomb type I and the dog bone honeycomb type II joints under the beam end are compared. A comprehensive analysis of the results of the finite element analysis can be made to compare the results of the finite element analysis. It can be obtained that the dog bone honeycomb node and the dog bone type node are compared. In the case of reduced material consumption, the bearing capacity and stiffness of the joints are not obviously reduced and the ductility is improved, and the advantages of the beautiful shape of the honeycomb beam and the advantages of passing through the pipeline are retained. In the study, The formation process of welding residual stress and the change of the weld area, the shear plate contact and the bolt pretightening force during the loading process of the beam end are also emphatically analyzed, and the advantages of the dog bone honeycomb joints are further highlighted.

【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU973.13

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本文編號：1863206