樓梯對(duì)框架—抗震墻結(jié)構(gòu)抗震性能的影響分析
發(fā)布時(shí)間：2018-07-16 20:48
【摘要】：底部框架-抗震墻結(jié)構(gòu)主要用于臨街的底部商店上部住宅工程,在我國(guó)一些中小城市大量的存在著,尤其是繁華地段的臨街建筑中使用較多。而其中以底部?jī)蓪涌蚣?抗震墻結(jié)構(gòu)最多。汶川地震中,此類(lèi)房屋破壞嚴(yán)重,其抗震性能有待研究。底部?jī)蓪涌蚣?抗震墻結(jié)構(gòu)是由框架剪力墻結(jié)構(gòu)和砌體結(jié)構(gòu)組成的復(fù)合結(jié)構(gòu),具有“頭重腳輕”、“上剛下柔”的特點(diǎn)。特別是樓梯作為發(fā)生地震和火災(zāi)時(shí)的緊急逃生通道,對(duì)主體結(jié)構(gòu)剛度的影響不容忽視。作為2010年陜西省自然科學(xué)基礎(chǔ)研究項(xiàng)目“地震作用下樓梯參與結(jié)構(gòu)整體計(jì)算的仿真分析”的一個(gè)分支,本文總結(jié)了現(xiàn)有各種分析方法,以一底部?jī)蓪涌蚣?抗震墻、上部四層砌體結(jié)構(gòu)為研究對(duì)象,運(yùn)用有限元分析軟件ETABS,分別建立不含樓梯的模型(模型1)和樓梯布置在結(jié)構(gòu)不同位置的模型(模型2～模型6),用振型分解反應(yīng)譜法和時(shí)程分析法對(duì)各個(gè)模型的抗震性能進(jìn)行對(duì)比分析。得出如下結(jié)論：1)樓梯的存在使框架抗震墻結(jié)構(gòu)的整體剛度增加了約40%。2)樓梯的存在使底部框架-抗震墻結(jié)構(gòu)的自振周期縮短約40%、最大傾覆力矩增加約30%,并且對(duì)振型的扭轉(zhuǎn)參與系數(shù)、抗側(cè)移剛度、平動(dòng)、扭轉(zhuǎn)效應(yīng)都有著顯著的影響。因此在結(jié)構(gòu)設(shè)計(jì)中將樓梯作為一個(gè)獨(dú)立單元參與抗震計(jì)算分析是必要的。3)對(duì)于樓梯間的主梁、平臺(tái)梁和承梯梁,建議采取加高梁高和加強(qiáng)配筋。強(qiáng)震來(lái)臨時(shí),梯柱的上下端節(jié)點(diǎn)會(huì)出現(xiàn)嚴(yán)重破壞,因此建議在以后的樓梯設(shè)計(jì)時(shí)應(yīng)保證梯柱的配筋,從而有力的保證樓梯間構(gòu)件具有足夠的抗震能力。4)當(dāng)樓梯位置從位置1向位置5改變,Y向地震下的頂點(diǎn)最大位移、層間位移和層間位移角逐漸增大,說(shuō)明樓梯剛度對(duì)結(jié)構(gòu)底部框架的扭轉(zhuǎn)變形有很大影響。所以在布置樓梯時(shí),盡量避免將單個(gè)樓梯布置在角部或端部,應(yīng)該沿著建筑物的中線對(duì)稱(chēng)布置。
[Abstract]:The bottom frame - aseismatic wall structure is mainly used in the bottom of the upper Storehouse Project on the street. It is widely used in some small and medium-sized cities in our country, especially in the busy streets. The two storey frame - seismic wall structure at the bottom is the most. In Wenchuan earthquake, this kind of building is badly damaged and its seismic performance needs to be studied. The bottom two storey frame - seismic wall structure is a composite structure composed of frame shear wall structure and masonry structure. It has the characteristics of "head and heavy foot light" and "upper rigidity and soft". In particular, staircase is an emergency escape passage for earthquake and fire, and it can not be ignored for the stiffness of the main structure. As the natural science foundation of Shaanxi Province in 2010 A branch of the foundation research project, "the simulation and analysis of the whole calculation of the staircase participation structure under the earthquake action", this paper summarizes the existing analytical methods, and uses a bottom two storey frame - aseismic wall and the upper four layers masonry structure as the research object. The staircase model (model 1) and staircase without staircase are established by the finite element analysis software ETABS. The models (model 2 ~ Model 6) are placed in different positions, and the seismic performance of each model is compared with the vibration mode decomposition response spectrum method and time history analysis. The following conclusions are obtained: 1) the existence of the staircase increases the overall stiffness of the frame aseismic wall structure by about 40%.2) and the existence of the floor ladder makes the bottom frame - aseismic wall structure free of vibration The cycle shortens about 40%, the maximum overturning moment increases by about 30%, and it has a significant influence on the torsion participation coefficient, lateral stiffness, translation and torsional effect. Therefore, it is necessary to take the staircase as an independent unit in the seismic calculation and analysis in structural design. For the main beam of the staircase, the platform beam and the staircase beam, it is suggested to adopt the.3. When the strong earthquake comes, the upper and lower end nodes of the staircase will be seriously damaged. Therefore, it is suggested that the staircase should be reinforced when the staircase is designed so that the staircase members have sufficient seismic capacity.4) to change the staircase position from position 1 to position 5, and the maximum displacement of the Y to the vertex under the earthquake. The interlayer displacement and the interlayer displacement angle gradually increase, indicating that the staircase stiffness has a great influence on the torsional deformation of the bottom frame of the structure. So, when the staircase is arranged, the single staircase should be avoided to be arranged in the corner or end, and should be arranged along the middle line of the building.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU352.11
本文編號(hào)：2127628
[Abstract]:The bottom frame - aseismatic wall structure is mainly used in the bottom of the upper Storehouse Project on the street. It is widely used in some small and medium-sized cities in our country, especially in the busy streets. The two storey frame - seismic wall structure at the bottom is the most. In Wenchuan earthquake, this kind of building is badly damaged and its seismic performance needs to be studied. The bottom two storey frame - seismic wall structure is a composite structure composed of frame shear wall structure and masonry structure. It has the characteristics of "head and heavy foot light" and "upper rigidity and soft". In particular, staircase is an emergency escape passage for earthquake and fire, and it can not be ignored for the stiffness of the main structure. As the natural science foundation of Shaanxi Province in 2010 A branch of the foundation research project, "the simulation and analysis of the whole calculation of the staircase participation structure under the earthquake action", this paper summarizes the existing analytical methods, and uses a bottom two storey frame - aseismic wall and the upper four layers masonry structure as the research object. The staircase model (model 1) and staircase without staircase are established by the finite element analysis software ETABS. The models (model 2 ~ Model 6) are placed in different positions, and the seismic performance of each model is compared with the vibration mode decomposition response spectrum method and time history analysis. The following conclusions are obtained: 1) the existence of the staircase increases the overall stiffness of the frame aseismic wall structure by about 40%.2) and the existence of the floor ladder makes the bottom frame - aseismic wall structure free of vibration The cycle shortens about 40%, the maximum overturning moment increases by about 30%, and it has a significant influence on the torsion participation coefficient, lateral stiffness, translation and torsional effect. Therefore, it is necessary to take the staircase as an independent unit in the seismic calculation and analysis in structural design. For the main beam of the staircase, the platform beam and the staircase beam, it is suggested to adopt the.3. When the strong earthquake comes, the upper and lower end nodes of the staircase will be seriously damaged. Therefore, it is suggested that the staircase should be reinforced when the staircase is designed so that the staircase members have sufficient seismic capacity.4) to change the staircase position from position 1 to position 5, and the maximum displacement of the Y to the vertex under the earthquake. The interlayer displacement and the interlayer displacement angle gradually increase, indicating that the staircase stiffness has a great influence on the torsional deformation of the bottom frame of the structure. So, when the staircase is arranged, the single staircase should be avoided to be arranged in the corner or end, and should be arranged along the middle line of the building.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU352.11
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 申躍奎;張濤;王威;;框架結(jié)構(gòu)樓梯的震害分析與設(shè)計(jì)對(duì)策[J];建筑結(jié)構(gòu);2009年11期
，本文編號(hào)：2127628
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