【作者】 张龙；

【导师】 方立新；

【作者基本信息】 东南大学 ， 结构工程， 2017， 硕士

【摘要】 随着高层建筑结构的迅速发展,结构对抗侧力构件的要求也相应提高,使得各种不同的新式剪力墙被研究人员关注,其中就包括钢板-混凝土组合剪力墙。钢板-混凝土组合剪力墙结合了型钢和混凝土两种材料的受力性能优势,具有承载能力高、延性比和侧向刚度大、耗能能力强的良好性能。目前,国内外对钢板-混凝土组合剪力墙的研究还不够完善,同时缺乏足够的工程经验和计算理论,这些都阻碍了它在实际工程中的应用,因此系统全面地研究这种形式的剪力墙及其抗震性能是很有必要的。本文基于ABAQUS有限元分析软件建立了精细化的钢板-混凝土组合剪力墙的数值分析模型,并且对其进行模拟分析验证,进而将模型进行了简化使其更适应实际工程设计分析的需要,最后通过简化的数值模拟模型研究了该类剪力墙在单调和循环荷载下的部分抗震性能。本文内容主要包括以下几点:(1)为研究钢板混凝土组合剪力墙的抗震性能,本文基于著名的ABAQUS有限元分析软件提出了该类剪力墙形式进行非线性数值模拟分析的精细化模型的建立方法,并对建立模型所依据的一些理论,包括混凝土结构模型理论、两种材料的基本模型和粘结滑移理论,进行了简要地论述。本文结合新版混凝土结构设计规范提出了混凝土损伤塑性模型参数的计算方法并确定了两种材料的计算参数与有限元软件所需的输入参数之间的换算方法,为进一步的精细化模型建立做铺垫。(2)本文参考以往的研究资料,在已有的试验基础上设计了相应钢板-混凝土组合剪力墙构件,利用ABAQUS有限元软件模拟分析了钢板-混凝土组合剪力墙构件在单调荷载作用下的力学性能。本文对比了采用忽略钢板与混凝土板界面粘结滑移时采用的绑定设置的模型分析结果、采用实体单元设置连接件的模型分析结果与试验结果。模拟分析的结果表明:本文建立的精细化的钢板混凝土组合剪力墙模型能够较为准确地模拟出实际构件的受力状况、破坏特征,特别是模拟出的栓钉的剪切变形特征以及剪切滑移效果与实际试验的结果较为接近,从而验证了所建立模型的可靠性。(3)为了提高数值模拟分析模型的计算效率,本文对精细化的数值模拟模型的简化方式进行了研究。简化的方式是通过非线性弹簧单元来代替实体单元来模拟栓钉的作用。本文通过对不同栓钉的布置的构件进行模拟分析,对栓钉剪切滑移曲线进行了鲁棒性测试,也验证了简化栓钉布置获得的剪切滑移曲线能够在密布栓钉的情况下也有一定的适用性。将布置单栓钉所获得的剪切滑移曲线应用于非线性弹簧单元模拟的模型,并对比两种模型的模拟结果与试验结果的差异,结果表明弹簧模型也同样能较为准确地模拟出实际构件的受力状况,从而验证了简化模型的可靠性。(4)本文在简化后的的数值模拟分析模型的基础上,设计了一系列钢板-混凝土组合剪力墙的构件,并利用ABAQUS软件研究了这些构件在单调水平荷载和循环荷载作用下的力学性能。通过绘制各剪力墙构件的承载力—水平位移的P-A关系曲线,并结合承载能力、变形能力、延性比和滞回耗能等参数指标,研究了轴压比、钢板厚度等部分抗震性能影响参数对钢板混凝土组合剪力墙构件在单调荷载和循环荷载下的力学性能的作用。结果表明:考虑钢板与混凝土板界面粘结滑移特性的精细化模型与直接采用完全连接的绑定模型相比,其结果与试验结果更为接近;高厚比、钢板厚度、轴压比和栓钉布置间距对钢板混凝土组合剪力墙的抗震性能都有不同程度的影响;高厚比与钢板厚度的增大都会明显提升构件的承载力、变形能力,但过厚的钢板会影响构件的延性比;稀疏布置的栓钉会使得构件的抗震性能指标下降;轴压比较小时(μ<0.2),增大轴压比有利于构件的抗震性能的提高,但是当轴压比较大时(μ>0.2),结果的变化趋势却会相反。更多还原

【Abstract】 With the rapid development of high-rise building structure,high-rise building structure has a rising demand for anti-lateral force components.A variety of new forms of shear wall have been concerned by the researchers,and among them is the Steel Plate-Concrete Composite Shear Wall.The Steel Plate-Concrete Composite Shear Wall combines the advantages of both steel and reinforced concrete structure,and it has high bearing capacity,large stiffness,good ductility and hysteretic behavior.Current study of The Steel Plate-Concrete Composite Shear Wall is not enough at home and abroad,and lack of sufficient engineering experience and systematic calculation theory,which hinders its extensive application in practical engineering.Therefore,it is very necessary to initiate a comprehensive and systematical study on the Steel Plate-Concrete Composite Shear Wall.Based on the ABAQUS finite element analysis software,in this paper,the numerical model of The Steel Plate-Concrete Composite Shear Wall is established,and its mechanical properties under monotonic and cyclic loading are studied-(1)In order to study the seismic performance of the Steel Plate-Concrete Composite Shear Wall,this paper proposes a method to establish the fine model of this kind of shear wall for nonlinear numerical simulation analysis which based on ABAQUS,the famous finite element analysis software.Some theories,including the concrete structure model theory,the basic model of the two materials and the theory of bond slip,are briefly discussed.In this paper,the calculation method of the concrete damage plastic model is put forward according to Code for design of concrete structures.The conversion method between the calculation parameters of the two materials and the input parameters of the finite element software is determined,which is laid for further model refinement.(2)In this paper,with reference to the existing research data,the corresponding steel-concrete composite shear wall members are designed on the basis of existing tests.The mechanical properties of steel-concrete composite shear wall members under monotonic loading are simulated and analyzed by ABAQUS,finite element software.This paper compares the differences among the analysis results of the model which ignore the bond slip between the steel plate and the concrete slab with binding settings,the analysis results of the model using the solid elements to set up connecting elements and test results.The results show that the finite element model of steel plate concrete shear wall established in this paper can accurately simulate the stress condition and damage characteristics of actual members.In particular,the shear deformation characteristics of the simulated pegs and the shear slip effect are closer to the actual test results.These verify the reliability of the finite element model established by this article.(3)In order to improve the computational efficiency of the numerical simulation analysis model,this paper examines the simplified approach to the model established by this paper.The simplified way is using the non-linear spring element instead of the solid element to simulate the role of studs.In this paper,the robustness of the shear slip curve of the studs is testd by the simulation analysis of the different pendulum arrangement model.It is proved that the shear slip curve obtained by the simplified pendulum arrangement can be applied in the case with densely covered studs.The shear slip curve obtained by disposing the single stud is applied to the model of nonlinear spring element simulation.By comparing the simulation results of the two kinds of models and the test results,it is proved that the simplified model also can more accurately simulate the actual component of the force situation which verify that the finite element model with non-linear spring element has a certain reliability.(4)Based on the established numerical simulation model,this paper designs a series of The Steel Plate-Concrete Composite Shear Wall members to researche their mechanical properties under monotonic load and cyclic loading by using ABAQUS.Draw the relationship between horizontal load value and vertex displacement value(P-A),and use the values of bearing capacity,deformability,ductility and hysteretic behavior to estimate the effect of seismic performance parameters,such as the axial pressure ratio and the thickness of steel plate,on the mechanical properties of steel plate composite shear wall members under monotonic load and cyclic loading.The results show that the result from the model using solid elements to simulate studs is closer to the test results than the result from the model without considering the bond-slip characteristics of the interface between the steel plate and the concrete slab.The aspect ratio,the thickness of the steel plate,the axial compression ratio and the spacing between studs has different effects on the seismic performance of the steel plate composite shear wall.The increase of the aspect ratio and the thickness of the steel plate will obviously improve the bearing capacity and deformation capacity of the wall.However,the thick steel plate will reduce the ductility ratio of the component.The component with too thick steel plate has lower ductility ratio.In the low pressure range(u<0.2),the increase in axial compression ratio is conducive to the improvement of the seismic performance of the component,but when the axial pressure is relatively large(u>0.2),the result is diametrically opposive.更多还原