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  本文關(guān)鍵詞：配筋混凝土小型空心砌塊橋墩的受力性能研究　出處：《重慶交通大學》2015年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 混凝土小型空心砌塊 配筋砌塊砌體 橋墩 大偏心受壓 反復靜力加載

【摘要】：配筋混凝土小型空心砌塊砌體結(jié)構(gòu)具有良好的力學性能和節(jié)能性,在建筑領(lǐng)域得到廣泛的運用。而在橋墩中采用該結(jié)構(gòu)能達到節(jié)能的目的,研究其在橋墩中的運用具有一定的意義。本文結(jié)合橋墩在實際工程中的一般受力形式及地震作用下的受力形式,分別設(shè)計了兩組試驗,其中一組是結(jié)合橋墩在自重及靜力荷載作用下的受力形式,設(shè)計并研究配筋混凝土小型空心砌塊橋墩的大偏心受壓破壞形態(tài)、承載能力和變形能力;另外一組試驗是考慮到大多數(shù)橋墩都是在地震中破壞,故設(shè)計了兩根構(gòu)件用于研究配筋混凝土小型空心砌塊橋墩在反復擬靜力加載下的受力、變形、變形回復、延性等性能。試驗結(jié)果表明,配筋混凝土小型空心砌塊橋墩在大偏壓作用下具有較好的承載能力,墩身開裂位置大部分集中出現(xiàn)在水平灰縫位置處,砌塊與灌孔混凝土之間具有良好的粘接力和協(xié)同工作性能,其變形彎曲形狀與鋼筋混凝土構(gòu)件的大偏壓變形彎曲形狀類似,受拉側(cè)與受壓側(cè)破壞現(xiàn)象與鋼筋混凝土構(gòu)件偏壓破壞現(xiàn)象十分相似,砌體構(gòu)件沒有出現(xiàn)脆性破壞和局部破壞;配筋混凝土小型空心砌塊橋墩在反復擬靜力加載下表現(xiàn)出較好的滯回特性、回復變形能力及延性,砌體橋墩構(gòu)件最終變形幅度較大且未完全失去承載能力,這些性能與典型的鋼筋混凝土構(gòu)件性能很接近,具有與鋼筋混凝土結(jié)構(gòu)相差不大的抗震性能。采用ABAQUS有限元軟件進行模擬,對試驗結(jié)果進行驗算,參照相關(guān)規(guī)范及他人的研究成果,結(jié)合試驗中得到的各項數(shù)據(jù)計算模型中的本構(gòu)關(guān)系,采用混凝土損傷塑性來設(shè)計砌體的塑性本構(gòu)。有限元模型采用整體式建模法進行建模,計算結(jié)果與試驗結(jié)果吻合較好,說明模型建立比較正確。利用有限元軟件的便利性,對試驗中無法模擬的受力情況進行模擬,計算結(jié)果表明配筋混凝土小型空心砌塊橋墩在模擬實際受力情況下也具有較好的力學性能。
[Abstract]:The reinforced masonry structure with mechanical properties and good energy efficiency, has been widely used in the field of architecture. And the structure in the pier can achieve the purpose of saving energy, researches its application in pier has a certain significance. This paper combined with the general pier in practical engineering and earthquake force under the action of force, were designed two sets of experiments, one group is with the bridge under the action of self weight and static load, bad shape breaking large eccentric compression design and research of reinforced concrete small hollow block pier, bearing capacity and deformation capacity; another group of test is given to the most the pier is damaged in the earthquake, so the design of the two components for the research of reinforced concrete small hollow block pier in iterative static loading stress, deformation, deformation recovery, ductility etc. The performance test results show that the reinforced concrete small hollow block pier has better bearing capacity under the large bias under the pier cracking position mostly appear at the location of the horizontal seam ash block has a good adhesion and cooperative working performance between concrete and grout, the bending deformation of shape and large eccentric compression reinforced concrete members the bending deformation of similar shape, tension and compression side side damage bias phenomenon and reinforced concrete failure phenomenon is very similar to that of brittle failure and the local failure of no masonry structure; reinforced concrete small hollow block type pier in repeated quasi-static loading showed better hysteresis, deformation capacity and ductility of masonry structures, piers the final deformation range and is not completely lose the bearing capacity, the performance is very close to the performance of reinforced concrete members with steel and typical. The seismic performance of reinforced concrete structure. The little difference is simulated by the finite element software ABAQUS, to verify the test results, according to relevant regulations and research results of others, the calculation model of constitutive relationship in combination with the data obtained in the test, the concrete damage plasticity to plastic design of masonry constitutive finite element model. The whole modeling method of modeling, the calculation results agree well with the experimental results, it indicated that the model is correct. The convenience of using finite element software, the stress conditions cannot be simulated in the simulation experiment, the calculation results show that it has good mechanical properties of the reinforced concrete small hollow block pier in the simulation of actual stress next.

【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U443.22;U441

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本文編號：1413299