高烈度區(qū)多層鋼結(jié)構(gòu)房屋抗震性能研究
本文選題:鋼框架結(jié)構(gòu) + 鋼框架—支撐; 參考:《成都理工大學(xué)》2016年碩士論文
【摘要】:截止2015年中國的人均居住面積10平方米以下的城市家庭達(dá)7000多萬戶,城市家庭住房面積低于20平方米的占7.8%,20-40平方米占32.7%,而城市流動(dòng)人口住房條件就更差了。同時(shí),與發(fā)達(dá)國家相比較,中國的房價(jià)偏高,這種偏高的價(jià)格對中低收入家庭來講是巨大的壓力。作為住宅產(chǎn)業(yè)化領(lǐng)域的新興力量,鋼結(jié)構(gòu)住宅有其在工程造價(jià)和施工進(jìn)度上的明顯優(yōu)勢,鋼結(jié)構(gòu)住宅的學(xué)術(shù)研究和市場化討論也越來越受到重視。鋼結(jié)構(gòu)住宅的主材為鋼材,其優(yōu)秀的材料強(qiáng)度和延性,以及便利的施工需求(施工進(jìn)度快)和卓越的抗震性能。再加上能夠可持續(xù)利用的特點(diǎn),同時(shí)他的空間利用率高(構(gòu)件尺寸小)等優(yōu)勢。本文選取一棟具有一定代表性的6層板式鋼框架住宅,主體結(jié)構(gòu)高度為20.1m,作為工程實(shí)例,該實(shí)例處于9度設(shè)防區(qū)域,屬于高烈度區(qū)域。利用有限元程序分析采用鋼框架方案下該住宅的地震響應(yīng),并與相同條件下的混凝土方案進(jìn)行技術(shù)和經(jīng)濟(jì)比較。主要研究內(nèi)容如下:1.通過有限元分析軟件SAP2000先對該工程實(shí)例進(jìn)行建模,并定義相關(guān)的材料特性、邊界條件、荷載加載方式等選取適當(dāng)工況。進(jìn)行多種(靜力分析、模態(tài)分析、反應(yīng)譜分析等)模式下的抗震性能分析,對其在9度區(qū)地震作用下的工作性能、破壞機(jī)理、耗能方式進(jìn)行討論。2.根據(jù)上述分析結(jié)果,對純鋼框架方案、鋼框架—支撐方案、鋼框架—剪力墻方案進(jìn)行抗震性能參數(shù)的比較。分析3種方案的結(jié)構(gòu)受力特征,同時(shí)評價(jià)其適用范圍和結(jié)構(gòu)的優(yōu)缺點(diǎn)。3.依據(jù)純鋼框架的有限元計(jì)算結(jié)果,分析對應(yīng)的混凝土方案構(gòu)件截面尺寸并進(jìn)行尺寸的優(yōu)化處理。再對比分析鋼框架與混凝土方案的經(jīng)濟(jì)性能,從基礎(chǔ)部分、主體造價(jià)、施工進(jìn)度、內(nèi)在價(jià)值等方面進(jìn)行對比分析,并最終得出結(jié)論。綜合上述研究內(nèi)容,經(jīng)過相應(yīng)的數(shù)據(jù)處理過程,得到研究結(jié)論如下:1.對于三種類型的鋼結(jié)構(gòu)來講,純框架方案對于側(cè)移能力的控制要顯著弱于鋼框架—支撐方案以及鋼框架—剪力墻方案,原因就在于后兩種方案分別增加了支撐構(gòu)件和剪力墻等措施構(gòu)件。因此,在烈度較大和建筑總高度過高地區(qū),不宜采用純框架結(jié)構(gòu)體系。2.通過計(jì)算分析,鋼框架—支撐和鋼框架—剪力墻體系在控制層間位移曲線能力上比較平緩,要明顯好于純框架形式。但最大層間位移位置往往出現(xiàn)在頂部附近,這提示我們應(yīng)當(dāng)更加關(guān)注頂層位移控制,而不僅僅是承載力,可以說在強(qiáng)地震作用下對結(jié)構(gòu)影響起決定性作用的一般是剛度和穩(wěn)定性。3.鋼框架—支撐體系由于支撐構(gòu)件的加入,使得結(jié)構(gòu)整體剛度增加,可有效降低整體側(cè)移,但應(yīng)引起注意的是支撐設(shè)置兩端的柱體因此受到更大的荷載,在進(jìn)行優(yōu)化設(shè)計(jì)的時(shí)候,可適當(dāng)加強(qiáng)。同時(shí),支撐構(gòu)件截面不宜設(shè)置過大,這是為了保證在耗能過程中優(yōu)先消耗支撐構(gòu)件屈服,保全梁柱后消耗。4、由于剪力墻的設(shè)置,使得鋼框架—剪力墻體系能夠在地震作用下對結(jié)構(gòu)的整體位移控制和柱底剪力的分擔(dān)作用最強(qiáng)。而隨著樓層的增加,柱體受力及其他參數(shù)指標(biāo)變化不大,整體曲線平滑,這使得在設(shè)計(jì)過程中對柱體的優(yōu)化設(shè)計(jì)可減小截面面積且不用采用變截面。但需指出的是,剪力墻建造需進(jìn)行濕作業(yè),與前述2種結(jié)構(gòu)完全干作業(yè)不同,需進(jìn)一步進(jìn)行施工和安裝創(chuàng)新,以達(dá)到產(chǎn)業(yè)化的目的。5、在技術(shù)上對比鋼筋混凝土結(jié)構(gòu)的優(yōu)勢在于:鋼結(jié)構(gòu)方案總重量輕,自振周期長,軸壓比控制更好。同時(shí),由于鋼結(jié)構(gòu)良好的抗震性能也大幅度提高了建筑的安全性能。由于鋼材本身強(qiáng)度高、剛度大,使得與相同條件下比較的混凝土體系的截面積要小,從而從客觀上增加了房間的使用面積,提升了凈空高度。6、在經(jīng)濟(jì)性上對比鋼混結(jié)構(gòu)方案的優(yōu)勢在于:鋼結(jié)構(gòu)項(xiàng)目一般多為工廠加工、現(xiàn)場進(jìn)行安裝,客觀上施工周期較短,從而大幅度降低了企業(yè)資金周轉(zhuǎn)壓力,同時(shí)人工費(fèi)用也可得到節(jié)約,這在講究經(jīng)濟(jì)效益的今天,其優(yōu)勢大大優(yōu)于混凝土方案。
[Abstract]:As of 2015 Chinese per capita living area of 10 square meters of the city by about 70000000 households, city family housing area less than 20 square meters accounted for 7.8%, 20-40 square meters accounted for 32.7%, while the city floating population housing conditions even worse. At the same time, compared with the developed countries, China's high prices, the high price it is a tremendous pressure on low-income families. As a new force of the field of the housing industry, the steel structure housing has its obvious advantages in the engineering cost and construction progress, academic research and market discussion of steel structure residential buildings are more and more attention. The steel structure housing advocate for steel, its excellent material strength and ductility, and convenient construction demand (fast construction progress) and excellent seismic performance. Coupled with the characteristics of sustainable utilization, and his high space utilization rate (components small size). Potential. This paper chooses a representative of the 6 type steel frame house, the height of the main structure is 20.1m, as an example, the instance is in the 9 degree seismic region, which belongs to the high earthquake intensity regions. By using the finite element analysis program using the seismic response of the steel frame residential plan, technical and economic comparison scheme and concrete under the same conditions. The main research contents are as follows: 1. through the finite element analysis software SAP2000 to the project of modeling, and the definition of material properties and the related boundary conditions, loading mode to select the appropriate working conditions. Various (static analysis, modal analysis, response spectrum analysis) seismic performance analysis model next, the failure mechanism of the work performance, 9 degree area under the action of earthquake, energy to discuss the.2. according to the above analysis result, the pure steel frame, steel frame braced steel frame scheme. Compare the seismic performance of the frame shear wall structure analysis scheme. 3 Schemes of the stress characteristic, and to evaluate the advantages and disadvantages of.3. the scope and structure of the pure steel frame based on the finite element calculation results, analysis of the corresponding optimization scheme of concrete section member size and size. Then comparative analysis of the economic performance of steel the frame and the concrete scheme, from the basic part, the main construction cost, construction schedule, intrinsic value were analyzed, and the conclusion. Based on the above research content, after the corresponding data processing, the conclusions of the study are as follows: 1. for the three types of steel structure, the pure frame scheme for lateral capacity the control was significantly weaker than that of steel braced frame and steel frame shear wall, the reason lies in the latter two schemes were increased by the support member and the shear wall structure measures . therefore, the large intensity and total building height is too high, should not adopt the frame structure of.2. through the calculation and analysis of steel braced frame and steel frame shear wall system in the control layer displacement curve ability is relatively flat, much better than the pure frame form. But the interlayer displacement often occur near the top, suggesting that we should pay more attention to the top displacement control, rather than capacity, it can be said that in the role of strong earthquakes on the structural effects play a decisive role is the rigidity and stability of.3. steel braced frame system by adding to the support member, the structure of the overall stiffness is increased, which can effectively reduce the overall the side shift, but attention should be paid to the column is arranged at both ends of the load due to the larger, in the optimization design, can be properly strengthened. At the same time, the support member section should not be set too high, This is to ensure that in the course of energy consumption in the consumption priority support component yield, preservation of beam column after consumption of.4, because of the shear wall, the steel frame shear wall system can share the strongest effect on the structure of the whole control displacement and shear force at the bottom of the column under earthquake. With the increase of floor, column force and other parameters change, the overall smooth curves, which makes the design process optimization design of the column can reduce the cross-sectional area without using cross-section. But it must be pointed out that the shear wall construction for wet work, unlike the structure of 2 kinds of completely dry work, the need for further innovation of construction and installation in order to achieve the purpose of industrialization,.5, in technology compared with the reinforced concrete structure is that: the steel structure project total light weight, vibration cycle length, axial compression ratio control is better. At the same time, because of the good seismic steel structure The performance also greatly improve the safety performance of the building. The steel with high strength, high stiffness, and the sectional area of concrete system under the same conditions compared to small, and from the objective to increase the using area of the room, enhance the clearance height of.6, in terms of economic of steel and concrete structure scheme advantage: steel structure project for the general factory processing, on-site installation, the construction cycle is short, thus greatly reducing the corporate liquidity pressure, while labor costs can be saved, which pay attention to the economic benefits of today, its advantage is much better than the concrete scheme.
【學(xué)位授予單位】:成都理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TU391;TU352.11
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