【作者】 李照林；

【导师】 方小丹；

【作者基本信息】 华南理工大学 ， 结构工程， 2011， 硕士

【摘要】 混凝土剪力墙是当今高层结构中的主要抗侧力构件,而在高层尤其是超高层结构中应用高强混凝土剪力墙,不仅能够有效的减轻建筑物自重,减小整体结构的地震反应,更能够降低建筑物造价,增加可观的使用空间,经济和社会效益显著。但高强混凝土剪力墙的抗震性能有待进一步进行研究。为了改善高强混凝土剪力墙的延性,设计了7个不同形式的高配筋率边缘约束构件高强混凝土剪力墙试件和1个普通配筋率的高强混凝土剪力墙试件,并在拟静力试验基础上,利用ABAQUS有限元软件对高强混凝土剪力墙进行非线性分析,主要包括以下几个方面的工作:(1)通过8个高强混凝土剪力墙试件在低周反复水平荷载作用下的试验,研究了高强混凝土剪力墙的抗震性能,分析了轴压比、剪跨比和约束边缘构件纵向钢筋配筋率等因素对高强混凝土剪力墙变形性能的影响。剪力墙试件的约束边缘构件(即暗柱或端柱)的纵筋配筋率设置为5%~8%左右,意在对暗柱或端柱范围混凝土进行有效约束,从而提高混凝土剪力墙的延性。(2)试验完成后,对剪力墙试件的破坏形态、滞回特性、变形能力、刚度退化特性、耗能能力、截面应变等进行了分析。试验研究结果表明,对于剪跨比λ≥2的剪力墙,在高强混凝土剪力墙中设置高配筋率暗柱或端柱,并适当提高水平和竖向分布钢筋的配筋率,可以显著提高高强混凝土剪力墙的抗震性能。(3)在高配筋率边缘约束构件高强混凝土剪力墙试验研究基础上,利用非线性有限元分析软件ABAQUS,建立了剪力墙的力学模型,对试件进行了单调位移加载的数值模拟仿真分析,理论结果与试验结果进行了对比分析、相互验证。结果表明,理论曲线与试验曲线能够较好的吻合。本文的研究成果为高强混凝土剪力墙的抗震设计提供了试验依据,对实际工程的设计和应用具有重要的意义。更多还原

【Abstract】 As a main lateral load resisting structural member, concrete shear wall is playing a important role in the high-building. Especially in the super high rise building, the using of the high performance concrete shear wall(HPCSW), which can efficiently reduce the weight, the earthquake action and the cost of the buildings, will bring enormous economic and social benefits. But the seismic performance of the HPCSW need further study. According to improve the ductility of the shear wall, seven different form specimens of the HPCSW with high reinforcement ratio boundary elements and one specimen of the HPCSW with common reinforcement ratio boundary element are designed to be tested under low cyclic reversed lateral loading. Then based on the experimental results, the nonlinear analysis is carried out using the ABAQUS finite element analysis(FEA) program. The main achievements of the dissertation are listed as following:(1) Through the tests of eight HPCSW specimens, the seismic performance is investigated. The influence of the axial load ratio、the shear span ratio、the longitudinal reinforcement ratio of the boundary element etc on the load-deformation response of the HPCSW has been explored deeply. The longitudinal reinforcement ratio of the boundary element (hidden column or boundary column) is set to between 5%~8%, intended to increase the ductility through effectively confining the core concrete.(2) Seismic behavior such as failure pattern, hysteretic characteristics, displacement ductility, rigidity degeneration and energy dissipation etc were investigated after the tests. The results show that when the shear span ratio ? ? 2, the seismic behavior of the HPCSW are significantly improved with higher horizontal and longitudinal reinforcement ratio.(3) Based on the experimental results, the nonlinear FEA software ABAQUS is used to set up the mechanical model of the shear wall specimens and the monotonic loading process is simulated. Theoretical results and the experimental results are contrasted mutually. The results show that theoretical curve and the experimental curve are in good agreement.In this paper, research results will supply experimental data and theoretical basis for seismic-bearing capacity calculation and design method of the high performance concrete shear wall. The research is of great significance for engineering design and practice.更多还原