【摘要】：近年來(lái),我國(guó)經(jīng)濟(jì)領(lǐng)域飛躍發(fā)展的同時(shí),城市化進(jìn)程也快速向前推進(jìn),受城市建筑日益密集化的限制,高層建筑和超高層建筑成為各個(gè)城市熱切追求的建筑形式,核心筒結(jié)構(gòu)形式在超高層建筑的結(jié)構(gòu)形式設(shè)計(jì)中應(yīng)用最為廣泛,作為超高層建筑施工中不可或缺的運(yùn)輸機(jī)械,選用合適的塔吊形式可以縮短施工工期從而提高經(jīng)濟(jì)效益。由于外掛內(nèi)爬式塔吊具有固定基礎(chǔ)附著式和傳統(tǒng)內(nèi)爬式塔吊所不具備的優(yōu)勢(shì),在超高層建筑的施工建造過(guò)程中逐漸應(yīng)用廣泛。本文闡述了外掛內(nèi)爬式塔吊在實(shí)際典型超高層建筑建造過(guò)程中的應(yīng)用以及研究成果,介紹了外掛內(nèi)爬式塔吊附著支撐體系結(jié)構(gòu)形式和爬升原理;結(jié)合南寧龍光世紀(jì)大廈工程實(shí)例,對(duì)外掛內(nèi)爬式塔吊附著支撐體系以及預(yù)埋件周邊主體部位利用有限元分析軟件進(jìn)行計(jì)算分析,根據(jù)塔臂在水平面上所處角度的不同分為八個(gè)工況,通過(guò)對(duì)有限元模型在八個(gè)工況下塔吊附著框架各構(gòu)件內(nèi)力以及支座反力的對(duì)比分析,判斷當(dāng)?shù)醣叟c墻體平行時(shí)為較不利工況,在實(shí)際施工時(shí)塔吊應(yīng)避免在此工況下長(zhǎng)時(shí)間處于滿荷狀態(tài);針對(duì)本論文背景工程預(yù)埋件設(shè)計(jì),在直錨筋形式預(yù)埋件不滿足設(shè)計(jì)規(guī)范的情況下,選用鋼板形式預(yù)埋件作為替換方案,本文通過(guò)有限元軟件驗(yàn)證鋼板形式預(yù)埋件能夠滿足塔吊正常運(yùn)行時(shí)的強(qiáng)度要求;隨著塔吊向上爬升的過(guò)程,支承架預(yù)埋件面臨布設(shè)位置選擇問(wèn)題,合理選擇預(yù)埋件布設(shè)位置可以有效減小預(yù)埋件周邊墻體應(yīng)力應(yīng)變水平,選取預(yù)埋件位于墻體中間和連梁上兩種情況,利用有限元軟件ABAQUS建立預(yù)埋件和墻體的有限元模型,通過(guò)對(duì)比兩種情況下墻體的應(yīng)力應(yīng)變水平,從墻體應(yīng)力應(yīng)變角度對(duì)塔吊支承架預(yù)埋件的布設(shè)位置提供切實(shí)可行的建議。
[Abstract]:In recent years, with the rapid development of economic field in China, the process of urbanization is also moving forward rapidly. Due to the increasingly dense urban buildings, high-rise buildings and super-high-rise buildings have become the hot pursuit of the architectural form of each city. The core-tube structure is widely used in the structural design of super-tall buildings. As an indispensable transport machinery in the construction of super-high-rise buildings, choosing the appropriate tower crane can shorten the construction period and improve the economic efficiency. Owing to the advantages of internal climbing tower cranes with fixed foundation and traditional climbing tower cranes, they are widely used in the construction process of super high-rise buildings. In this paper, the application and research results of external mounted internal climbing tower crane in the construction process of typical super high-rise building are described, and the structure form and climbing principle of attached support system of external and internal climbing tower crane are introduced. Combined with the example of Longguang Century Building in Nanning, the attachment support system of internal climbing tower crane and the main parts around the embedded parts were calculated and analyzed by finite element analysis software. According to the different angles of the tower arm in the horizontal plane, it is divided into eight working conditions. By comparing the internal force and the support reaction force of each member of the tower crane attachment frame under the eight working conditions, the finite element model is compared and analyzed. It is judged that when the boom is parallel to the wall, it is unfavorable, and the tower crane should be avoided under this condition for a long time under the condition of full load. In view of the design of embedded parts in the background engineering of this paper, if the embedded parts in the form of straight anchor bars do not meet the design specifications, the steel plate embedded parts are selected as the replacement scheme. In this paper, the finite element software is used to verify that the steel plate embedded parts can meet the strength requirements of the tower crane in normal operation. As the tower crane climbs upward, the support member is faced with the problem of location selection. The reasonable selection of the location of the embedded part can effectively reduce the stress and strain level of the wall around the embedded part. In this paper, the finite element model of the embedded part and the wall is established by using the finite element software ABAQUS, and the stress and strain level of the wall is compared by comparing the stress and strain levels of the wall under the two conditions, which are located in the middle of the wall and on the connecting beam. From the angle of stress and strain of the wall, practical suggestions are provided for the placement of the pre-buried parts of the tower crane support frame.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU974;TU61

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本文編號(hào)：2407524