本文選題：鋼筋混凝土梁 + 受剪承載力��； 參考：《長沙理工大學》2014年碩士論文

【摘要】：對鋼筋混凝土構件抗剪機理的研究已超過100年,但是由于抗剪機理本身的復雜性,且影響因素眾多,然而迄今為止其理論仍不盡完善,至今仍沒有得到公認的理論模型。目前關于鋼筋混凝土梁斜截面抗剪承載力研究主要針對的是配箍筋的鋼筋混凝土梁,而對于斜筋存在情況下混凝土梁的抗剪性能研究尚少見報道。本文依據(jù)配斜筋鋼筋混凝土的試驗,對鋼筋混凝土梁的斜截面抗剪機理進行了分析,具體研究如下：(1)總結了國內(nèi)外鋼筋混凝土構件抗剪承載力研究的現(xiàn)狀,并對鋼筋混凝土構件的受剪承載力計算模型進行較為系統(tǒng)的闡述,對比分析了各種理論之間的優(yōu)缺點。(2)簡要介紹了配斜筋鋼筋混凝土梁斜截面受剪承載力的試驗概況,對加載過程中的試驗現(xiàn)象及試驗所得的數(shù)據(jù)進行了分析,包括裂縫裂縫寬度、撓度、剪壓區(qū)的應變和鋼筋應變等隨荷載增加的變化,對其變化規(guī)律進行了分析。(3)對比分析了中國規(guī)范(GB50010-2010)和美國規(guī)范(AC1318-08)中有腹筋梁的受剪承載力計算公式,考慮了兩國規(guī)范中混凝土強度、剪跨比和配箍率等參數(shù)對受剪承載力的影響。對中美規(guī)范中所采用的鋼筋和混凝土材料的強度進行了換算。并對不同混凝土強度等級和不同鋼筋的中美規(guī)范規(guī)定的最小配筋率進行了對比分析。(4)對Rinkane強度破壞準則進行了簡化,基于極限平衡理論和簡化的混凝土強度破壞準則,提出了配斜筋的鋼筋混凝土梁斜截面受剪承載力計算公式,并通過試驗梁的斜截面受剪承載力與理論值進行對比,試驗結果與理論值吻合較好。
[Abstract]:The shear mechanism of reinforced concrete members has been studied for more than 100 years, but due to the complexity of shear mechanism itself and many factors affecting it, its theory is still not perfect, and there is still no accepted theoretical model. At present, the research on shear capacity of reinforced concrete beams with skew section is mainly focused on reinforced concrete beams with stirrups. Based on the experiment of reinforced concrete with skew reinforcement, this paper analyzes the shear mechanism of reinforced concrete beam with inclined section. The specific research is as follows: (1) the present situation of research on shear bearing capacity of reinforced concrete members at home and abroad is summarized. The calculation model of shear bearing capacity of reinforced concrete members is systematically expounded, and the advantages and disadvantages of various theories are compared and analyzed. (2) A brief introduction is given to the experimental survey of shear bearing capacity of reinforced concrete beams with skew bars. The experimental phenomena during loading and the experimental data are analyzed, including the variation of crack width, deflection, strain in shear compression zone and strain of steel bar with the increase of load. The variation law is analyzed. (3) the formulas for calculating the shear capacity of web reinforced beams in Chinese Code (GB50010-2010) and American Code (AC1318-08) are analyzed, and the concrete strength in the codes of the two countries is considered. The influence of shear span ratio and hoop ratio on shear bearing capacity. The strength of steel bar and concrete material used in Chinese-American code is converted. The minimum reinforcement ratio of different concrete strength grades and different steel bars is compared and analyzed. (4) the Rinkane strength failure criterion is simplified based on the limit equilibrium theory and the simplified concrete strength failure criterion. A formula for calculating the shear capacity of reinforced concrete beams with skew tendons is presented. The experimental results are in good agreement with the theoretical values by comparing the shear capacity of the inclined section of the test beams with the theoretical values.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU375.1

【參考文獻】

相關期刊論文 前1條

1 張建仁;劉彬;王磊;張旭輝;;配有斜筋混凝土梁抗剪承載力計算與試驗[J];應用力學學報;2012年06期

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本文編號：2103753