本文選題：蒸壓加氣混凝土砌塊　切入點(diǎn)：錨固長(zhǎng)度　出處：《鄭州大學(xué)》2015年碩士論文

【摘要】：對(duì)蒸壓加氣混凝土砌塊自保溫墻體的建筑構(gòu)造及熱工性能進(jìn)行了試驗(yàn)研究及理論計(jì)算,主要進(jìn)行了三個(gè)方面的試驗(yàn)研究:蒸壓加氣混凝土砌塊自保溫砌體水平灰縫中鋼筋的錨固試驗(yàn)研究、蒸壓加氣混凝土砌塊專(zhuān)用砂漿與鋼筋的粘結(jié)錨固機(jī)理試驗(yàn)研究和蒸壓加氣混凝土砌塊自保溫墻體的冷橋試驗(yàn)研究。通過(guò)9個(gè)構(gòu)件36根鋼筋在蒸壓加氣混凝土砌塊自保溫砌體水平灰縫中的拉拔試驗(yàn),詳細(xì)分析了砂漿強(qiáng)度等級(jí)、鋼筋錨固長(zhǎng)度和豎向正應(yīng)力等因素對(duì)拉結(jié)鋼筋粘結(jié)錨固性能的影響;測(cè)定鋼筋內(nèi)力沿錨固長(zhǎng)度的分布,計(jì)算鋼筋粘結(jié)應(yīng)力沿錨固長(zhǎng)度的變化;提出鋼筋在蒸壓加氣混凝土砌塊自保溫砌體水平灰縫中的錨固長(zhǎng)度;通過(guò)有限元軟件對(duì)砌體水平灰縫中鋼筋的粘結(jié)錨固性能進(jìn)行數(shù)值模擬分析,計(jì)算結(jié)果與試驗(yàn)結(jié)果符合較好。通過(guò)14組43根鋼筋在砌塊專(zhuān)用砂漿中的拉拔試驗(yàn),詳細(xì)分析鋼筋直徑、專(zhuān)用砂漿強(qiáng)度以及鋼筋錨固長(zhǎng)度對(duì)其粘結(jié)錨固性能的影響,回歸得出砌塊專(zhuān)用砂漿與鋼筋之間的極限粘結(jié)強(qiáng)度計(jì)算公式;通過(guò)4根鋼筋內(nèi)貼片試驗(yàn)試件的試驗(yàn)結(jié)果,得出錨固長(zhǎng)度范圍內(nèi)粘結(jié)應(yīng)力的分布曲線和形狀函數(shù);并通過(guò)可靠度分析,提出拉結(jié)鋼筋在砌塊專(zhuān)用砂漿中的錨固長(zhǎng)度設(shè)計(jì)建議。通過(guò)蒸壓加氣混凝土砌塊自保溫墻體的冷橋試驗(yàn)研究,實(shí)測(cè)框架柱節(jié)點(diǎn)處的溫度和熱流密度,分別計(jì)算出框架柱與自保溫墻體的傳熱系數(shù),進(jìn)而得出自保溫墻體的平均傳熱系數(shù);通過(guò)有限元軟件對(duì)實(shí)測(cè)框架柱節(jié)點(diǎn)處的溫度場(chǎng)進(jìn)行數(shù)值模擬,計(jì)算出溫度的分布情況,確定了冷橋的影響范圍。
[Abstract]:The structure and thermal performance of autoclaved aerated concrete block self-insulating wall are studied experimentally and calculated theoretically. Three aspects of experimental research are mainly carried out: experimental study on the anchoring of steel bars in the horizontal ash joints of autoclaved aerated concrete blocks. Experimental study on bonding and anchoring mechanism between mortar and steel bar for autoclaved aerated concrete block and cold bridge test on autoclaved aerated concrete block self-insulating wall. 36 reinforced concrete blocks with 9 members in autoclaved aerated concrete block. Drawing test in horizontal ash joint of self-insulating masonry, The influences of mortar strength grade, reinforcement Anchorage length and vertical normal stress on bond anchoring properties of tensile reinforcement are analyzed in detail, the distribution of internal force along anchoring length is measured, and the variation of bond stress along anchoring length is calculated. The Anchorage length of reinforcing bar in autoclaved aerated concrete block self-insulating horizontal ash joint is put forward, and the bond anchoring performance of reinforcing bar in horizontal gray joint of masonry is simulated and analyzed by finite element software. The calculated results are in good agreement with the test results. The effects of the diameter of steel bar, the strength of special mortar and the length of reinforcement Anchorage on the bonding and anchoring properties of the steel bar are analyzed in detail through the drawing test of 43 steel bars in the concrete mortar. The formula of ultimate bond strength between concrete mortar and steel bar is obtained by regression, and the distribution curve and shape function of bond stress in the Anchorage length range are obtained by the test results of four steel bar internal patch test specimens. Based on the reliability analysis, the paper puts forward some suggestions for the design of anchoring length of reinforced steel bar in the special mortar of block. Through the cold bridge test of autoclaved aerated concrete block self-insulating wall, the temperature and heat flux density at the joint of frame column are measured. The heat transfer coefficient of frame column and self-insulating wall is calculated respectively, and the average heat transfer coefficient of self-insulating wall is obtained. The temperature field at the joint of frame column is simulated by finite element software, and the temperature distribution is calculated. The influence range of cold bridge is determined.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU522.3

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陳萌;趙湘育;馬婷婷;張豪劍;劉樂(lè)慶;;蒸壓加氣混凝土砌塊自保溫墻體專(zhuān)用砌筑砂漿中鋼筋埋置長(zhǎng)度的試驗(yàn)研究[J];混凝土與水泥制品;2016年02期

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本文編號(hào)：1653806