本文關(guān)鍵詞： 荷載裂縫 不同樓層施工進(jìn)度 多層模板支撐體系 混凝土早期強(qiáng)度 混凝土早期彈性模量　出處：《青島理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來，隨著我國(guó)經(jīng)濟(jì)和社會(huì)發(fā)展水平的不斷提升，房地產(chǎn)市場(chǎng)迅猛發(fā)展，高層住宅如雨后春筍般出現(xiàn)�，F(xiàn)澆混凝土結(jié)構(gòu)是工業(yè)與民用建筑中普遍采用的結(jié)構(gòu)形式，然而現(xiàn)澆樓板的裂縫就成為一項(xiàng)經(jīng)常發(fā)生的工程質(zhì)量通病，并成為近幾年來工程質(zhì)量投訴的熱點(diǎn)問題。地產(chǎn)開發(fā)商為了快速回籠資金，要求加快施工進(jìn)度，施工單位為了降低工程的成本，加快施工速度。住宅樓層的施工周期一定，為了完成工程進(jìn)度，不可避免的出現(xiàn)施工工序交叉現(xiàn)象，工序交叉引起施工荷載疊加。樓板混凝土養(yǎng)護(hù)時(shí)間很短，樓層就開始上載，混凝土早期強(qiáng)度低，承受荷載的能力差，容易出現(xiàn)荷載裂縫。現(xiàn)有的結(jié)構(gòu)設(shè)計(jì)規(guī)范對(duì)裂縫的研究?jī)H限于養(yǎng)護(hù)28天的混凝土，沒有研究施工過程中荷載作用產(chǎn)生的裂縫。在施工過程中，多套模板體系和多塊混凝土板共同承擔(dān)荷載作用，不同層混凝土樓層的混凝土養(yǎng)護(hù)時(shí)間不同，，彈性模量就不同，受力形勢(shì)極其復(fù)雜。本文針對(duì)青島市多個(gè)住宅項(xiàng)目做系統(tǒng)的住宅裂縫及裂縫出現(xiàn)的原因相調(diào)研，對(duì)施工進(jìn)度對(duì)裂縫的影響做出了系統(tǒng)的研究。具體內(nèi)容如下： 首先，歸納總結(jié)了不同樓層進(jìn)度施工過程中各工序的分布情況，根據(jù)工序的分布確定了不同樓層施工進(jìn)度樓面上載時(shí)混凝土養(yǎng)護(hù)的時(shí)間。根據(jù)施工工序的分布情況分析了工序交叉引起的荷載疊加情況，對(duì)荷載疊加進(jìn)行研究。 其次，利用混凝土成熟度理論對(duì)混凝土的早期強(qiáng)度做了系統(tǒng)的研究，引用彈性模量的計(jì)算公式對(duì)混凝土早期的彈性模量做了研究。 再次，利用ABAQUS有限元軟件建立施工過程中的多層模板體系模型，進(jìn)行受力分析，分析的結(jié)果與用混凝土成熟度理論計(jì)算出的混凝土早期強(qiáng)度作比較，得出合理樓層施工進(jìn)度的工序合理安排。
[Abstract]:In recent years, with China's economic and social development and improve the level of the real estate market, the rapid development of high-rise residential buildings such as bamboo shoots after a spring rain. Cast-in-place concrete structure is widely used in the structure of industrial and civil construction, however, the cracks in cast-in-place floor has become a regular occurrence of engineering quality problems, and become a hot spot the problem of the project quality complaints in recent years. Real estate developers in order to quickly return the funds, to speed up the construction schedule, construction units in order to reduce the project cost, speed up the pace of construction. The construction period of a residential building, in order to complete the project progress, the inevitable emergence of the construction process of the phenomenon of cross cross process caused by superimposed construction load. The curing time the concrete slab is very short, the floor began to upload, early strength of concrete is low, the ability to bear the load, prone to load the crack. The existing structure The research on design standard of crack is limited to 28 days of curing concrete, no crack load on the construction process. In the process of construction, multiple sets of template system and the concrete blocks to bear load, concrete curing time of different layer of concrete floor, the elastic modulus is different, the stress situation is extremely complex in this paper. A number of residential projects in Qingdao city do cause crack and crack system of research, made a systematic study on the influence of construction schedule on the crack. The specific contents are as follows:
First, summarized the distribution of each process on different floors of progress in the process of construction, according to the process of distribution determines the concrete curing different floors of the construction schedule. According to the distribution of the floor on the construction process of load superposition process caused by the cross, to study the load superposition.
Secondly, the early strength of concrete is systematically studied by using the theory of concrete maturity, and the elastic modulus of concrete is studied by using the formula of elastic modulus.
Thirdly, using ABAQUS finite element software to establish multi-storey formwork system model in construction process, carry out stress analysis, compare the results with those calculated by concrete maturity theory, and draw reasonable arrangement for reasonable floor construction progress.

【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU974;TU755.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 宋憲棠;負(fù)溫混凝土成熟度應(yīng)用問題(二)[J];低溫建筑技術(shù);1987年04期

2 趙挺生,方東平,顧祥林,張譽(yù);施工期現(xiàn)澆鋼筋混凝土結(jié)構(gòu)的受力特性[J];工程力學(xué);2004年02期

3 陳肇元;崔京浩;朱金銓;安明U

本文編號(hào)：1511764