本文選題：地基反力　切入點(diǎn)：地基反力分配比　出處：《東北大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：高層建筑基礎(chǔ)的選型是由工程地質(zhì)、上部結(jié)構(gòu)體系、柱荷載大小以及施工條件等多因素決定�；A(chǔ)設(shè)計(jì)時(shí)應(yīng)首先弄清楚地基基礎(chǔ)的受力機(jī)理和模式,只有這樣才能更準(zhǔn)確地進(jìn)行計(jì)算,使建筑設(shè)計(jì)更趨于安全合理。 構(gòu)造板擴(kuò)展基礎(chǔ)是一種既不同于擴(kuò)展基礎(chǔ)又不同于筏形基礎(chǔ)的新型基礎(chǔ)類型。在柱下采用鋼筋混凝土擴(kuò)展基礎(chǔ),柱間采用平板式構(gòu)造底板,擴(kuò)展基礎(chǔ)與構(gòu)造底板澆筑成一體。此基礎(chǔ)比擴(kuò)展基礎(chǔ)具有更高的承載能力,比筏形基礎(chǔ)具有更好的經(jīng)濟(jì)效益。為了弄清楚該基礎(chǔ)的工作機(jī)理,使設(shè)計(jì)更安全、更合理,必須要進(jìn)行深一步的探索和研究。 本文結(jié)合遼寧省博物館新館構(gòu)造板擴(kuò)展基礎(chǔ)地基反力及內(nèi)力的測試研究,得出地基反力分布規(guī)律：總體上看呈波浪形,擴(kuò)展基礎(chǔ)底部反力值最大,跨中處反力值最小。 通過“地基反力分配比”的公式對實(shí)測地基反力進(jìn)行調(diào)整和計(jì)算,利用ANSYS分析軟件,采用整體式與分離式模型進(jìn)行模擬研究可知：擴(kuò)展基礎(chǔ)底板處鋼筋始終受拉力作用,其中心處的拉應(yīng)力最大,由基礎(chǔ)中心向基礎(chǔ)兩側(cè)鋼筋的拉應(yīng)力逐漸減小,并且在進(jìn)入柱上板帶時(shí)拉應(yīng)力逐漸變成壓應(yīng)力,壓應(yīng)力值隨著與擴(kuò)展基礎(chǔ)距離的加大而逐漸加大。 文中關(guān)于構(gòu)造板擴(kuò)展基礎(chǔ)的一系列實(shí)驗(yàn)與模擬研究,對更經(jīng)濟(jì)安全的進(jìn)行基礎(chǔ)設(shè)計(jì)提供了重要參考價(jià)值。工程中若能合理的使用這種新型基礎(chǔ)將會(huì)獲得可觀的經(jīng)濟(jì)效益,這種新型基礎(chǔ)有著廣泛的使用前景和應(yīng)用價(jià)值。
[Abstract]:The selection of high-rise building foundation is determined by engineering geology, superstructure system, column load and construction conditions. Only in this way can we calculate more accurately and make the design more safe and reasonable. The structural slab expansion foundation is a new type of foundation, which is different from both the extended foundation and the raft foundation. The reinforced concrete expansion foundation is adopted under the column, and the slab floor is used between the columns. The expanded foundation has higher bearing capacity and better economic benefit than the raft foundation. In order to find out the working mechanism of the foundation, the design is safer and more reasonable. Must carry on the deep exploration and the research. Based on the test and study of the foundation reaction and internal force of the expanded foundation of the new museum of Liaoning Provincial Museum, the law of the distribution of the foundation reaction force is obtained: generally speaking, the reaction value is the largest at the bottom of the expanded foundation and the smallest at the middle of the span. Through the formula of "distribution ratio of foundation reaction force", the measured foundation reaction force is adjusted and calculated. By using ANSYS analysis software, the integral model and the separate model are used to simulate the results. It is known that the reinforcement at the extended foundation floor is always subjected to tensile force. The tensile stress at the center of the column decreases gradually from the center of the foundation to the reinforcing bar on both sides of the foundation, and the tensile stress gradually changes into the compressive stress when entering the strip on the column, and the value of the compressive stress increases with the increase of the distance from the extended foundation. In this paper, a series of experimental and simulation studies on the expansion foundation of the structural plate provide an important reference value for more economical and safe foundation design. If this new type of foundation can be used reasonably in engineering, considerable economic benefits will be obtained. This new type of foundation has wide application prospect and application value.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU470

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