配筋混凝土小型空心砌块桥墩的受力性能研究

发布时间：2018-01-12 07:30

本文关键词：配筋混凝土小型空心砌块桥墩的受力性能研究　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：配筋混凝土小型空心砌块砌体结构具有良好的力学性能和节能性,在建筑领域得到广泛的运用。而在桥墩中采用该结构能达到节能的目的,研究其在桥墩中的运用具有一定的意义。本文结合桥墩在实际工程中的一般受力形式及地震作用下的受力形式,分别设计了两组试验,其中一组是结合桥墩在自重及静力荷载作用下的受力形式,设计并研究配筋混凝土小型空心砌块桥墩的大偏心受压破坏形态、承载能力和变形能力;另外一组试验是考虑到大多数桥墩都是在地震中破坏,故设计了两根构件用于研究配筋混凝土小型空心砌块桥墩在反复拟静力加载下的受力、变形、变形回复、延性等性能。试验结果表明,配筋混凝土小型空心砌块桥墩在大偏压作用下具有较好的承载能力,墩身开裂位置大部分集中出现在水平灰缝位置处,砌块与灌孔混凝土之间具有良好的粘接力和协同工作性能,其变形弯曲形状与钢筋混凝土构件的大偏压变形弯曲形状类似,受拉侧与受压侧破坏现象与钢筋混凝土构件偏压破坏现象十分相似,砌体构件没有出现脆性破坏和局部破坏;配筋混凝土小型空心砌块桥墩在反复拟静力加载下表现出较好的滞回特性、回复变形能力及延性,砌体桥墩构件最终变形幅度较大且未完全失去承载能力,这些性能与典型的钢筋混凝土构件性能很接近,具有与钢筋混凝土结构相差不大的抗震性能。采用ABAQUS有限元软件进行模拟,对试验结果进行验算,参照相关规范及他人的研究成果,结合试验中得到的各项数据计算模型中的本构关系,采用混凝土损伤塑性来设计砌体的塑性本构。有限元模型采用整体式建模法进行建模,计算结果与试验结果吻合较好,说明模型建立比较正确。利用有限元软件的便利性,对试验中无法模拟的受力情况进行模拟,计算结果表明配筋混凝土小型空心砌块桥墩在模拟实际受力情况下也具有较好的力学性能。
[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.

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.22;U441

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