再生混凝土T形短肢剪力墙抗震性能研究

发布时间：2018-04-19 04:41

本文选题：再生混凝土 + T形短肢剪力墙　；参考：《西安建筑科技大学》2014年硕士论文

【摘要】：随着生活水平的提高，人们对住宅尤其是高层住宅平面与空间的要求越来越高，原来普通框架结构的露梁露柱、普通剪力墙结构对建筑空间的严格限定已经不能满足人们对住宅空间上的要求，因此吸收了普通剪力墙结构和框架结构双重优点以满足人们新的住宅观念的高层住宅结构形式应运而生，即短肢剪力墙结构。目前，众多国内外学者对短肢剪力墙的性能进行了大量的试验研究和理论分析，但研究范围仍主要集中在普通混凝土短肢剪力墙的性能方面，对于再生混凝土短肢剪力墙构件的研究目前国内甚少，几乎处于空白状态。因此，结合再生混凝土自身性能的特征，研究再生混凝土短肢剪力墙的抗震性能，探索再生混凝土短肢剪力墙的实用抗震设计方法，具有重要的理论与实际工程意义。为了研究再生混凝土T形短肢剪力墙的抗震性能，本文主要做了以下工作：（1）以不同粗骨料取代率为主要参数，设计制作了15组共45个再生混凝土试块，其中粗骨料取代率分别为0%、50%和100%。通过材性试验，研究了再生混凝土的立方体抗压强度、轴心抗压强度和弹性模量等，分析了不同取代率对再生混凝土力学性能的影响，同时还研究了不同取代率时再生混凝土受压的应力-应变曲线，给出了不同取代率时再生混凝土受压本构模型的上升段方程。（2）以不同粗骨料取代率和不同轴压比为主要参数，按1/2缩尺比例设计制作了4根T形短肢剪力墙试验模型结构，并对其进行了低周反复荷载作用下的拟静力试验，研究了不同取代率及取代率为50%时不同轴压比T形再生混凝土短肢剪力墙的破坏模式、滞回性能、承载能力、延性、刚度和耗能能力等，，并以试验结果为依据，分析了上述性能指标随粗骨料和轴压比变化的一般规律，得出了一些可供参考的结论和建议。（3）在试验研究的基础上，参考已有研究成果，通过理论分析，建立了再生混凝土短肢剪力墙承载力计算的简化模型与公式，并进行了承载力的理论计算，计算结果与试验结果进行了对比，两者吻合较好，同时建议了恢复力模型曲线的计算公式。（4）以本文建议的再生混凝土受压本构模型和已有研究成果，应用ABAQUS有限元分析软件，进行了再生混凝土短肢剪力墙的有限元模拟分析，研究了其滞回曲线和破坏形态，探讨了其耗能能力，并与试验结果进行了对比，两者吻合较好，说明本文建立的模型合理。
[Abstract]:With the improvement of living standard, people have higher and higher demands on the plane and space of the residence, especially the high-rise residence.The strict restriction of the common shear wall structure on the building space can no longer meet the requirements of the residential space.Therefore, the high-rise housing structure which absorbs the double advantages of the common shear wall structure and the frame structure to meet the new housing concept has emerged as the times require, that is, the short limb shear wall structure.At present, many scholars at home and abroad have done a lot of experimental research and theoretical analysis on the performance of short-leg shear wall, but the research scope is still focused on the performance of ordinary concrete short-leg shear wall.The research of regenerated concrete short-leg shear wall members is very few in our country at present, and it is almost blank.Therefore, it is of great theoretical and practical significance to study the seismic behavior of recycled concrete short-leg shear wall and to explore the practical seismic design method of recycled concrete short-leg shear wall.In order to study the seismic behavior of recycled concrete T-shaped short-leg shear wall, the main work of this paper is as follows:1) taking different coarse aggregate substitution rate as the main parameter, a total of 15 groups of 45 recycled concrete test blocks were designed and manufactured, in which the coarse aggregate replacement rates were 0% and 100% respectively.The cube compressive strength, axial compressive strength and elastic modulus of recycled concrete were studied through the test of wood properties, and the influence of different substitution rates on the mechanical properties of recycled concrete was analyzed.At the same time, the stress-strain curves of recycled concrete under different substitution rates are studied, and the rising equation of the constitutive model of recycled concrete under different substitution rates is given.(2) with different coarse aggregate replacement rate and different axial compression ratio as the main parameters, four T-shaped short-leg shear wall test model structures are designed according to the scale of 1 / 2 scale, and the quasi-static tests are carried out on them under low cyclic repeated loads.The failure modes, hysteretic properties, load-carrying capacity, ductility, stiffness and energy dissipation capacity of T-shaped recycled concrete short leg shear walls with different axial compression ratios at different replacement rates and replacement ratios of 50 are studied, and the results are based on the experimental results.The general rules of the above performance indexes with the change of coarse aggregate and axial compression ratio are analyzed, and some conclusions and suggestions for reference are obtained.On the basis of experimental research and referring to the existing research results, a simplified model and formula for calculating the bearing capacity of recycled concrete short-leg shear walls are established through theoretical analysis, and the theoretical calculation of the bearing capacity is carried out.The calculated results are in good agreement with the experimental results, and the formula of the restoring force model curve is suggested.4) based on the constitutive model of recycled concrete under compression and existing research results, the finite element simulation analysis of recycled concrete short leg shear wall is carried out by using ABAQUS finite element analysis software, and its hysteretic curve and failure mode are studied.The energy dissipation capacity is discussed and compared with the experimental results. The results are in good agreement with each other, which indicates that the proposed model is reasonable.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.2;TU352.11

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