页岩陶粒混凝土的单轴和二轴受压试验研究

发布时间：2018-04-14 07:00

  本文选题：全轻页岩陶粒混凝土 + 二轴受压　； 参考：《河南理工大学》2014年硕士论文

【摘要】：由于轻骨料混凝土的强度影响因素不仅较多,而且相关规程对配合比设计规定的范围又较宽;同时,混凝土结构通常又多处于多轴应力状态;但目前不仅没有恰当的配合设计方法,而且也没有统一的强度理论适用于任何种类的混凝土在二轴应力状态下的破坏准则,从而导致生产与设计困难而不利于工程应用。因此,为了确定最佳配合比设计参数,本文首先对全轻页岩陶粒混凝土进行了不同强度等级条件下的一系列强度因素影响试验;然后又对全轻页岩陶粒混凝土分别进行了单轴和二轴受压试验,并分别建立了相应本构关系和二轴受压破坏准则;最后,又对不同混凝土材料的框架结构进行了抗震验算。具体地,本文主要针对以下几个方面内容进行了研究。(1)依据松散体积法及试配强度的基本要求,首先通过试配试验,得到所需各种原材料的配合比(依强度等级而定);然后又分别对水胶比、砂率、骨料粒径范围、粗细骨料总体积和页岩陶粒浸水时间,对全轻页岩混凝土的抗压强度影响进行探讨;(2)进行了全轻页岩陶粒混凝土的一般物理力学性能试验,不仅得到了基本物理力学性能参数,而且还得到了单轴受压应力条件下的应力-应变曲线;(3)进行了全轻页岩陶粒混凝土的二轴受压试验,不仅得到了不同应力比条件下的应力-应变曲线,而且还建立了破坏准则及本构关系;(4)针对某一实际工程,对结构分别为普通钢筋混凝土和页岩陶粒钢筋混凝土,进行了抗震验算和比较分析。结果表明,页岩陶粒混凝土较普通混凝土的楼层荷载降低了14.8%,较标准层层间剪力降低了32.7%。
[Abstract]:Because the strength of lightweight aggregate concrete is affected by many factors, and the relevant rules have a wide range of the mix ratio design, at the same time, the concrete structure is usually in the state of multi-axial stress.However, not only there is no suitable design method, but also there is no unified strength theory applicable to the failure criterion of any kind of concrete under biaxial stress, which leads to the difficulty of production and design, which is not conducive to engineering application.Therefore, in order to determine the optimum mix ratio design parameters, this paper first carried out a series of strength factors under different strength grade conditions to the whole light shale ceramsite concrete.Then the uniaxial and biaxial compression tests of full light shale ceramsite concrete are carried out, and the corresponding constitutive relation and biaxial compression failure criterion are established, respectively. Finally, the aseismic checking calculation of the frame structure with different concrete materials is carried out.Specifically, this paper mainly focuses on the following aspects. 1) according to the basic requirements of loose volume method and trial strength, first of all, through trial matching test,The mixture ratio of each kind of raw material is obtained (depending on the grade of strength, and then the water / binder ratio, sand ratio, aggregate particle size range, total volume of coarse aggregate and soaking time of shale ceramsite) are obtained respectively.The effect of compressive strength on the compressive strength of full weight shale concrete is discussed. (2) the general physical and mechanical properties of full weight shale ceramsite concrete are tested, and not only the basic physical and mechanical properties are obtained, but also the basic physical and mechanical properties are obtained.Moreover, the stress-strain curve under uniaxial compressive stress is obtained. The biaxial compression test of full light shale ceramsite concrete is carried out. Not only the stress-strain curves under different stress ratios are obtained, but also the stress-strain curves under different stress ratios are obtained.The failure criterion and constitutive relation are also established. For a practical project, the aseismic checking calculation and comparative analysis are carried out for the structures of normal reinforced concrete and shale ceramsite reinforced concrete respectively.The results show that the floor load of shale ceramsite concrete is reduced by 14.8than that of ordinary concrete, and the shear force between layers is reduced by 32.7percent.
【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU528
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本文编号：1748197