本文選題：鋼筋混凝土板　切入點(diǎn)：沖切試驗(yàn)　出處：《寧夏大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：柱下基礎(chǔ)底板、無(wú)梁樓蓋板柱連接體和集中荷載作用下的橋面板等鋼筋混凝土平板結(jié)構(gòu),由于其具有結(jié)構(gòu)簡(jiǎn)單、傳力路徑短捷、能夠增加樓層凈高、經(jīng)濟(jì)實(shí)用以及良好的適應(yīng)性和可變性等特質(zhì),使得此種結(jié)構(gòu)在實(shí)際工程中的運(yùn)用越來(lái)越廣泛。隨著各種復(fù)雜因素的影響,如基礎(chǔ)底板和無(wú)梁樓蓋等平板結(jié)構(gòu)中板柱節(jié)點(diǎn)處需承受板傳來(lái)的較大集中力的作用,因此節(jié)點(diǎn)的強(qiáng)度往往難以保證。很多學(xué)者認(rèn)為導(dǎo)致此種結(jié)構(gòu)的破壞是因?yàn)榘灏l(fā)生了沖切破壞,但問(wèn)題本身的復(fù)雜性,國(guó)內(nèi)外學(xué)者對(duì)沖切破壞機(jī)理的認(rèn)識(shí)未達(dá)成一致,對(duì)研究的焦點(diǎn)也大多集中在分別采用理論或試驗(yàn)的研究方法上。綜合考慮以上因素,作者對(duì)大量的國(guó)內(nèi)外相關(guān)試驗(yàn)資料進(jìn)行分析,采取試驗(yàn)與理論相結(jié)合的方法,對(duì)這一問(wèn)題進(jìn)行了系統(tǒng)的總結(jié)與研究,主要研究?jī)?nèi)容及結(jié)論如下:(1)通過(guò)對(duì)鋼筋混凝土板進(jìn)行沖切試驗(yàn)并分析以往數(shù)據(jù)庫(kù)下板的沖切試驗(yàn)資料,了解鋼筋混凝土板的沖切破壞形態(tài)、破壞過(guò)程以及作用機(jī)理。(2)通過(guò)對(duì)本次試驗(yàn)及前期試驗(yàn)的數(shù)據(jù)進(jìn)行分析,得出影響鋼筋混凝土板沖切承載力的主要因素包括:荷載作用周長(zhǎng)、作用位置、混凝土強(qiáng)度、配筋率、骨料尺寸、板尺寸效應(yīng)等。(3)通過(guò)試驗(yàn)可知:在板支撐長(zhǎng)度一定的情況下,若板的加載周長(zhǎng)增大,板抗沖切承載力也增大,且荷載加載位置于板中心時(shí)抗沖切承載力最低,越靠近支撐邊其抗沖切承載力越高。(4)將鋼筋混凝土板中混凝土強(qiáng)度提高、配筋率增大及薄板中的粗骨料粒徑增大都能提高鋼筋混凝土板的抗沖切承載力。(5)本文利用英國(guó)BS式、美國(guó)ACI式、日本土木學(xué)會(huì)式和中國(guó)規(guī)范式四個(gè)公式,針對(duì)國(guó)內(nèi)外及本次沖切試驗(yàn)總共63個(gè)樣本數(shù)據(jù)進(jìn)行分析計(jì)算,認(rèn)為英國(guó)BS規(guī)范計(jì)算公式得到的計(jì)算值與本系列試驗(yàn)的試驗(yàn)值相比較其他三種規(guī)范而言最佳,試驗(yàn)值與計(jì)算公式的吻合性最好;美國(guó)ACI式及日本土木學(xué)會(huì)式的試驗(yàn)值與計(jì)算值比值相對(duì)較大,計(jì)算結(jié)果較為保守,結(jié)構(gòu)設(shè)計(jì)趨于安全;中國(guó)規(guī)范式中,由于考慮的影響因素較少,對(duì)于不同試驗(yàn)板,中國(guó)規(guī)范式的試驗(yàn)值與計(jì)算值比值相差較大,較為離散,若采取計(jì)算值作為沖切強(qiáng)度值,在結(jié)構(gòu)設(shè)計(jì)中易使結(jié)構(gòu)設(shè)計(jì)趨于安全或趨于不安全,對(duì)結(jié)構(gòu)設(shè)計(jì)不利。
[Abstract]:Foundation under column, floor without beam column connection bridge panel body and concentrated loads of reinforced concrete flat plate structure, because it has the advantages of simple structure, short transmission path, can increase the net height of the floor, economical and practical and good adaptability and variability characteristics of the structure in the actual engineering application and more widely. With the influence of various complex factors, such as the foundation slab and beam floor plate structure plate column joints need to bear a larger concentration in coming force, so the strength of joint is often difficult to guarantee. Many scholars believe that this leads to structural damage occurred because of plate punching failure, but the complexity the problem itself, understanding of domestic and foreign scholars of punching failure mechanism did not reach an agreement, the focus of the research are mostly concentrated in research methods of theory and experiment on the comprehensive consideration. The above factors, the author of a large number of domestic and foreign relevant test data analysis, adopt the method of combining experiment and theory, to this problem are summarized and studied systematically, the main research contents and conclusions are as follows: (1) based on the steel reinforced concrete slab punching test and analysis of the previous database under plate punching all experimental data, understand the reinforced concrete slab punching failure form, failure process and mechanism. (2) through the analysis of the test and the preliminary test data, the effects of reinforced concrete plate punching capacity of the main factors include: load perimeter, role position, concrete strength, reinforcement ratio and the aggregate size, board size effect. (3) experimental result shows that in the condition of a certain length of support plate, if the increase in the plate loading perimeter, punching capacity increases in load, and the position in the center of impact plate The lowest shear bearing capacity, the more close to the edge of the support of punching capacity higher. (4) the strength of concrete in reinforced concrete slabs increased, reinforcement ratio increases and the sheet of coarse aggregate size increase can improve the reinforced concrete slab punching capacity. (5) the British BS ACI, the United States, Japan Society of civil engineers and China standard four formula, at home and abroad and the cutting test of a total of 63 sample data analysis and calculation that the British standard BS formula to get the value compared to the other three kinds of specifications and the best test series test value and test value and the calculation formula of the best agreement; ACI of the United States and Japan Society of civil engineers of the experimental values and the calculated values of the ratio is relatively large, the results are more conservative, structural design tends to be safe; China standard, due to less consideration of influencing factors for different subjects There is a large discreteness between the test value and the calculated value of the standard plate in China, and if the calculated value is used as punching shear strength, the structural design tends to be safe or tends to be unsafe in the structural design, which is unfavorable for the structural design.

【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU375.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 魏巍巍;貢金鑫;田磊;;鋼筋混凝土板受沖切承載力對(duì)比分析[J];建筑科學(xué)與工程學(xué)報(bào);2010年04期

2 連曉莊;陳曉明;;國(guó)內(nèi)外規(guī)范抗沖切設(shè)計(jì)方法評(píng)介[J];四川建筑科學(xué)研究;2007年04期

3 劉立渠;;國(guó)內(nèi)外規(guī)范關(guān)于鋼筋混凝土板沖切承載力的比較研究[J];建筑結(jié)構(gòu);2007年07期

4 舒兆發(fā);;板柱結(jié)構(gòu)邊柱節(jié)點(diǎn)的受沖切承載力[J];湖南大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年01期

5 劉立渠;;鋼筋混凝土板抗沖切的有限元計(jì)算研究[J];建筑科學(xué);2007年01期

6 蔡健;林凡;;基于雙剪強(qiáng)度理論的混凝土板極限沖切承載力計(jì)算方法[J];工程力學(xué);2006年06期

7 周朝陽(yáng),張賽賽,劉澍;混凝土板及基礎(chǔ)抗沖切設(shè)計(jì)計(jì)算截面的取法[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年01期

8 林旭健,錢在茲,鄭作樵;鋼纖維高強(qiáng)混凝土方形沖切板的變形與強(qiáng)度[J];土木工程學(xué)報(bào);2004年12期

9 舒兆發(fā);板柱結(jié)構(gòu)的中柱節(jié)點(diǎn)傳遞剪力和不平衡彎矩的沖切承載力[J];湖南大學(xué)學(xué)報(bào)(自然科學(xué)版);2003年05期

10 周朝陽(yáng);配置抗沖切鋼筋的混凝土板柱連接的破壞形態(tài)與承載力分析[J];建筑結(jié)構(gòu)學(xué)報(bào);1997年06期

相關(guān)碩士學(xué)位論文 前2條

1 王茹;鋼筋混凝土平板的抗沖切承載力研究[D];湖南大學(xué);2013年

2 盧致強(qiáng);鋼筋混凝土板的有限元法分析[D];西南交通大學(xué);2003年

，

本文編號(hào)：1607317