本文選題：框架—核心筒結(jié)構(gòu)　切入點：加強層　出處：《西安工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在高層和超高層建筑中,框架——核心筒結(jié)構(gòu)在側(cè)向荷載作用下的頂點位移往往會因為結(jié)構(gòu)的抗側(cè)移剛度不足而超過國家規(guī)范的限值。為解決這個問題,結(jié)構(gòu)工程師通常在結(jié)構(gòu)中布置加強層以提高結(jié)構(gòu)抗側(cè)剛度。這樣就會出現(xiàn)豎向剛度不均導(dǎo)致加強層附近產(chǎn)生內(nèi)力和變形的突變,使結(jié)構(gòu)難以形成良好的屈服機制。本文在總結(jié)國內(nèi)外對帶加強層的框架——核心筒結(jié)構(gòu)研究的基礎(chǔ)上,通過有限元分析軟件ETABS建立了 40層框架——核心筒模型,主要研究不同數(shù)量、不同剛度以及不同類型的加強層對結(jié)構(gòu)在風(fēng)荷載和地震作用下的受力性能的影響。主要結(jié)論有:1)加強層的設(shè)置能明顯減小結(jié)構(gòu)的側(cè)移,且其數(shù)量越多剛度越大對結(jié)構(gòu)側(cè)移的減小越多,但減小幅度則會隨之降低。2)加強層的設(shè)置會使其附近幾層結(jié)構(gòu)構(gòu)件產(chǎn)生2～8倍的內(nèi)力突變,且其剛度越大突變越劇烈,導(dǎo)致結(jié)構(gòu)形成不利于抗震的薄弱層。而加強層數(shù)量增加時構(gòu)件內(nèi)力突變會減小,有利于抗震。3)有限剛度加強層相比剛性加強層能使結(jié)構(gòu)突變程度減輕20%～40%,設(shè)置帶狀桁架則會使框架柱軸力突變程度減小1/3。4)彈性時程法揭示出了結(jié)構(gòu)的局部地震反應(yīng)特征,其分析結(jié)果普遍要小于振型反應(yīng)譜法,但是仍有個別例外的情況,應(yīng)選擇時程法和反應(yīng)譜法的最不利的情況進行包絡(luò)設(shè)計。5)Pushover分析中,模型被推覆到目標(biāo)位移后設(shè)置1～2道加強層的結(jié)構(gòu)延性最好,而當(dāng)不設(shè)置或設(shè)置三道加強層的結(jié)構(gòu)發(fā)生推覆破壞。6)隨著加強層數(shù)量的增加,性能點處的加速度譜逐漸增加,位移譜逐漸減少;同時結(jié)構(gòu)基底剪力逐漸增加,頂點位移逐漸減少。7)加強層的存在會導(dǎo)致其附近出現(xiàn)柱鉸,不滿足"強柱弱梁"的要求,加強層伸臂塑性鉸均比剪力墻塑性鉸開展得要早,符合"強筒體,弱伸臂"的延性要求。
[Abstract]:In high-rise and super-high-rise buildings, the vertex displacement of frame-core tube structure under lateral load often exceeds the limit of the national code because of the insufficient lateral stiffness of the structure. Structural engineers usually place strengthened layers in the structure to improve the lateral stiffness of the structure. Thus, there will be a sudden change in the internal force and deformation near the strengthening layer due to the uneven vertical stiffness. It is difficult for the structure to form a good yield mechanism. On the basis of summing up the research on frame-core tube structure with reinforced layer at home and abroad, a 40-story frame-core tube model is established by the finite element analysis software ETABS. The effects of different numbers, different stiffness and different types of stiffeners on the behavior of structures subjected to wind load and earthquake are studied. The main conclusion is that the setting of strengthening layer can obviously reduce the lateral displacement of the structure. The larger the stiffness is, the smaller the lateral displacement of the structure is, but the smaller the magnitude is, the smaller the reinforcement layer is, and the more the stiffness is, the more abrupt the internal force will be, and the more the stiffness is, the more violent the internal force will be, and the larger the stiffness is, the smaller the magnitude will be, and the larger the stiffness is, the smaller the magnitude will be. As the number of strengthened layers increases, the internal force of the member will decrease. It is advantageous to earthquake resistance. 3) compared with rigid strengthening story, finite stiffness strengthened story can reduce the sudden change degree of structure by 20% and 40%, and the sudden change degree of axial force of frame column will be reduced by 1 / 3. 4) when the truss is installed, the local seismic response characteristics of the structure can be revealed by the method of elasticity. The analytical results are generally smaller than the modal response spectrum method, but there are still some exceptional cases. The most unfavorable cases of the time-history method and the response spectrum method should be selected for enveloping design. 5 pushover analysis. When the model is pushed to the target displacement, the ductility of the structure with 1 or 2 reinforcement layers is the best, but when the structure without or with three strengthened layers occurs nappe failure. 6) with the increase of the number of strengthening layers, the acceleration spectrum at the performance points increases gradually. At the same time, the shear force of the base of the structure gradually increases, and the displacement of the vertex decreases gradually. 7) the existence of the strengthened layer will lead to the appearance of column hinge nearby, which does not meet the requirements of "strong column and weak beam". The plastic hinge of the strengthened layer extension arm is earlier than the shear wall plastic hinge, which meets the ductility requirement of "strong tube body, weak extension arm".
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU973.17

【參考文獻】

相關(guān)期刊論文 前10條

1 王鳳霞;歐進萍;;Pushover analysis procedure for systems considering SSI effects based on capacity spectrum method[J];Earthquake Engineering and Engineering Vibration;2007年03期

2 周旭;黃詠政;尹華鋼;侯軍祥;;罕遇地震作用下鋼筋混凝土結(jié)構(gòu)的靜力彈塑性分析[J];建筑結(jié)構(gòu);2007年04期

3 汪大綏;賀軍利;芮明倬;盛峰;劉明國;;帶有剪力墻(筒體)結(jié)構(gòu)靜力彈塑性分析方法與應(yīng)用[J];建筑結(jié)構(gòu);2006年07期

4 黃怡,王元清,陳宏,溫四清;水平加強層對超高層鋼框架-支撐結(jié)構(gòu)的影響[J];重慶建筑大學(xué)學(xué)報;2005年03期

5 沈朝勇,黃襄云,周福霖,羅學(xué)海,任珉,陳建秋,溫健婷;帶SRC桁架轉(zhuǎn)換層及鋼加強層高層建筑抗震性能研究[J];地震工程與工程振動;2004年06期

6 汪大綏,賀軍利,張鳳新;靜力彈塑性分析(Pushover Analysis)的基本原理和計算實例[J];世界地震工程;2004年01期

7 尹華偉,汪夢甫,周錫元;結(jié)構(gòu)靜力彈塑性分析方法的研究和改進[J];工程力學(xué);2003年04期

8 黃世敏,魏璉,衣洪建,程紹革,趙斌;高層建筑中水平加強層最優(yōu)位置的研究[J];建筑科學(xué);2003年02期

9 汪夢甫,周錫元;鋼筋混凝土框架—剪力墻結(jié)構(gòu)非線性地震反應(yīng)實用分析方法的研究[J];土木工程學(xué)報;2002年06期

10 鐘善桐,劉大林;剛伸臂在鋼管混凝土高層框筒結(jié)構(gòu)體系中的工作性能[J];哈爾濱建筑大學(xué)學(xué)報;2002年01期

相關(guān)會議論文 前1條

1 鄭竹;黃用軍;;大震下的靜力推覆分析及其在工程建模分析中的應(yīng)用參數(shù)設(shè)置研究[A];慶祝劉錫良教授八十華誕暨第八屆全國現(xiàn)代結(jié)構(gòu)工程學(xué)術(shù)研討會論文集[C];2008年

相關(guān)碩士學(xué)位論文 前5條

1 馬俊;加強層設(shè)置耗能構(gòu)件的框架—核心筒結(jié)構(gòu)抗震性能分析[D];中南大學(xué);2014年

2 馬帥;斜腹桿桁架加強層在框架—核心筒結(jié)構(gòu)中的受力性能研究[D];太原理工大學(xué);2014年

3 孫毅;帶加強層鋼框架—核心筒結(jié)構(gòu)抗震性能分析[D];沈陽建筑大學(xué);2011年

4 陳宇;帶加強層框架—核心筒結(jié)構(gòu)自由振動與抗震性能研究[D];湖南大學(xué);2008年

5 蘇志彬;大連國貿(mào)大廈中設(shè)置加強層問題的研究[D];大連理工大學(xué);2006年

，

本文編號：1562171