本文選題：基于性能 + 框架結(jié)構(gòu)　； 參考：《石河子大學(xué)》2017年碩士論文

【摘要】：《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》(JGJ3-2010)第3.4.6條對(duì)樓板開洞作了如下規(guī)定:當(dāng)樓板平面比較狹長、有較大的凹入和開洞時(shí),應(yīng)在設(shè)計(jì)中考慮其對(duì)結(jié)構(gòu)產(chǎn)生的不利影響。有效樓板寬度不宜小于該層樓面寬度的50%;樓板開洞總面積不宜超過樓面面積的30%;在扣除凹入或開洞后,樓板在任一方向的最小凈寬度不宜小于5m,且開洞后每一邊的樓板凈寬度不應(yīng)小于2m。而在實(shí)際工程中,超出規(guī)范規(guī)定的樓板開洞問題比比皆是,其中樓板開洞面積、尺寸等往往超越規(guī)范對(duì)樓板開洞的規(guī)定。并且隨著人們生活水平的提高,對(duì)建筑物的體型和功能要求越來越高,樓板開洞超限的現(xiàn)象也就越來越多。如果樓板開洞超限,可能會(huì)對(duì)結(jié)構(gòu)產(chǎn)生不利的影響,削弱結(jié)構(gòu)的抗震性能。國內(nèi)外學(xué)者對(duì)于樓板開洞超限的框架結(jié)構(gòu)的研究還不是很多,并且主要是對(duì)樓板進(jìn)行的彈性計(jì)算分析。本論文針對(duì)樓板開洞超限問題進(jìn)行研究,采用基于性能要求的抗震設(shè)計(jì)方法,對(duì)樓板帶有各種形式開洞的結(jié)構(gòu)進(jìn)行模擬分析。運(yùn)用PKPM軟件中的PMCAD、SATWE進(jìn)行建模和小震彈性計(jì)算分析、PMSAP進(jìn)行樓板應(yīng)力分析、EPDA對(duì)結(jié)構(gòu)進(jìn)行彈塑性計(jì)算分析。對(duì)計(jì)算結(jié)果進(jìn)行分析,找出結(jié)構(gòu)的薄弱部位,有針對(duì)性的采取抗震加強(qiáng)措施,為樓板開洞超限的建筑工程設(shè)計(jì)時(shí)提供參考。以下為主要的研究工作及結(jié)論:(1)考慮樓板的不同開洞面積,建立五個(gè)分析模型。在其他條件全部相同的情況下,通過控制結(jié)構(gòu)首層的開洞尺寸,采用逐步增大首層開洞面積的方法,研究開洞率對(duì)結(jié)構(gòu)抗震性能的影響。研究表明:樓板開洞面積越大,對(duì)結(jié)構(gòu)越不利。當(dāng)開洞面積大于30%時(shí),會(huì)削弱結(jié)構(gòu)的整體剛度,開洞附近樓板出現(xiàn)應(yīng)力集中以及梁柱上出現(xiàn)塑性鉸等現(xiàn)象。在采取加強(qiáng)措施之后,結(jié)構(gòu)能達(dá)到預(yù)期的性能目標(biāo)。(2)樓板在開洞面積和其他條件都相同時(shí),分別在樓板中間、邊緣和角部各開一個(gè)洞建立分析模型,研究開洞位置對(duì)結(jié)構(gòu)抗震性能的影響。研究表明:在樓板的角部開洞對(duì)結(jié)構(gòu)剛度的削弱較大,梁柱上出現(xiàn)塑性鉸較多。在采取加強(qiáng)措施之后,結(jié)構(gòu)能達(dá)到預(yù)期的性能目標(biāo)。當(dāng)在樓板的中間開洞時(shí),樓板上出現(xiàn)明顯的應(yīng)力集中現(xiàn)象。(3)樓板在開洞面積和其他條件都相同時(shí),分別在樓板中間、對(duì)邊和對(duì)角各開兩個(gè)洞口和開成不規(guī)則的L型洞口建立分析模型,研究開洞形式對(duì)結(jié)構(gòu)抗震性能的影響。研究表明:開成不規(guī)則的L型洞時(shí),對(duì)結(jié)構(gòu)剛度的削弱較大。在樓板對(duì)角開兩個(gè)洞時(shí),結(jié)構(gòu)受到的扭轉(zhuǎn)效應(yīng)最大。當(dāng)在樓板中間開兩個(gè)洞口時(shí),樓板上出現(xiàn)明顯的應(yīng)力集中現(xiàn)象。(4)樓板在開洞面積相同時(shí),分別在結(jié)構(gòu)的首層開洞、中間層開洞、頂層開洞和全層都開洞建立分析模型,研究開洞樓層對(duì)結(jié)構(gòu)抗震性能的影響。研究表明:在每層的樓板上都開洞時(shí),對(duì)結(jié)構(gòu)短邊方向的抗側(cè)剛度削弱較大,中震作用下樓板的整體應(yīng)力水平較高。(5)考慮樓板之間的連接板尺寸建立分析模型,分別設(shè)定兩個(gè)洞口之間不同的距離,從而使兩個(gè)洞口之間的連接板形成不同的尺寸,研究連接板尺寸對(duì)結(jié)構(gòu)抗震性能的影響。研究表明:不同的連接板尺寸,對(duì)結(jié)構(gòu)的整體剛度影響較小,而連接板尺寸超限時(shí),樓板上會(huì)出現(xiàn)應(yīng)力集中的現(xiàn)象。
[Abstract]:"Technical specification for concrete structure of high building > (JGJ3-2010) section 3.4.6 provides the following provisions for the opening of the floor slab: when the floor plane is relatively narrow and has a larger concave and open hole, the adverse effects on the structure should be considered in the design. The width of the effective floor should not be less than 50% of the floor width of the floor; the total area of the floor slab should not exceed the total floor area. 30% of floor area; the minimum net width of floor slab in any direction should not be less than 5m after deducting concave or open holes, and the net width of floor slab on each side should not be less than 2M. after opening. In actual engineering, the opening problems of floor slab beyond the specification are abound, in which the floor area, size, etc. often exceed the standard opening to the floor. And with the improvement of people's living standards, the requirements for the shape and function of buildings are getting higher and higher, and the opening of the floor is more and more limited. If the opening of the floor is Overlimited, it may have a negative impact on the structure and weaken the seismic performance of the structure. It is not much, and it is mainly the elastic calculation and analysis of floor slab. In this paper, the problem of opening and exceeding the limit of the floor is studied. Using the seismic design method based on the performance requirements, the structure of the floor with various forms of opening is simulated and analyzed. The modeling and the elastic calculation and analysis of the small earthquake are carried out by using the PMCAD, SATWE in the PKPM software. PMSAP carries out the analysis of the floor stress and the elastic and plastic analysis of the structure by EPDA. The results are analyzed, the weak parts of the structure are found, and the anti-seismic measures are taken to provide reference for the design of the building engineering. The following are the main research work and conclusions: (1) considering the different opening surfaces of the floor slab. Five analysis models are set up. Under all the other conditions, the effect of opening rate on the seismic performance of the structure is studied by controlling the opening size of the first layer of the structure and the opening area of the first layer gradually. The study shows that the larger the opening area of the floor is, the more unfavorable the structure is. When the opening area is greater than 30%, the knot will weaken the knot. The whole stiffness of the structure, the stress concentration in the floor near the opening and the plastic hinge on the beam and column. After the strengthening measures, the structure can reach the expected performance target. (2) the floor is at the same time in the opening area and other conditions, and the analysis model is set up in the middle of the floor, the edge and the corner, and the opening position is studied. The study shows that the structural stiffness is weakened greatly in the corner of the floor, and there are more plastic hinges on the beam and column. After the reinforcement measures are taken, the structure can reach the desired performance target. When the floor is opened in the middle of the floor, the obvious stress concentration is found on the floor. (3) the floor area is in the opening area and in the opening area. The other conditions are at the same time, the analysis model is set up in the middle of the floor, two openings on the side and the diagonal and the irregular L cavities. The influence of the opening form on the seismic performance of the structure is studied. The study shows that when the irregular L hole is opened, the stiffness of the structure is weakened greatly. When the floor is open to the corner of the two holes, the structure is subjected to the structure. When two holes are opened in the middle of the floor, there is an obvious stress concentration on the floor. (4) at the same time, the floor is opened in the first layer of the structure, the opening of the middle layer, the opening of the top layer and the whole layer are opened to establish the analysis model to study the effect of the opening floor on the seismic performance of the structure. When the floor of the floor is open, the lateral stiffness of the short side of the structure is weakened greatly, and the overall stress level of the floor is higher under the action of medium earthquake. (5) the analysis model is established to establish the analysis model of the connecting plate size between the floors, and the different distances between the two holes are set respectively, so that the different sizes of the connecting plates between the two holes are formed. The influence of the size of the connecting plate on the seismic performance of the structure shows that the different size of the connecting plate has little effect on the overall stiffness of the structure, while the stress concentration will appear on the floor when the size of the connecting plate is beyond the limit.
【學(xué)位授予單位】：石河子大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU323.5

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本文編號(hào)：1975265