【作者】 王建祥；

【导师】 胡景龙； 苏枋；

【作者基本信息】 新疆农业大学 ， 水利水电工程， 2006， 硕士

【摘要】 根据有限元理论和计算机仿真原理的基本思路,利用有限元分析软件ANSYS,对T形短肢剪力墙试件的承载能力、变形能力及延性进行推覆模拟试验;并对其影响因素进行优化分析。首先采用ANSYS中的三维实体单元SOLID65建立了T形短肢剪力墙有限元分析模型。然后通过改变试件的混凝土等级、截面配筋率、轴压比和墙肢截面高厚比等影响因素,对T形短肢剪力墙试件进行了模拟试验,分组比较的方法分析了各影响因素对试件的承载能力、变形能力及延性性能的影响,以及产生此影响的原因;进而进行优化分析,找出各影响因素的优化值;并对T形短肢剪力墙试件的破坏过程进行了分析。然后在混凝土等级、截面配筋率、轴压比和墙肢截面高厚比等影响因素取得优化值的基础上及总配筋量不变的情况下,通过改变暗柱和暗支撑的截面配筋率,对加暗柱和加暗支撑的T形短肢剪力墙试件进行了模拟试验。分组分析了改变配筋率对加暗柱和加暗支撑的T形短肢剪力墙的承载能力、变形能力及延性性能的影响;并进行优化分析,找出其优化值。最后在其各影响因素取得优化值的前提下,对常规T形短肢墙、加暗柱T形短肢墙、加暗支撑T形短肢墙的承载能力、变形能力及延性性能进行了比较。模拟试验较真实的反映了,T形短肢剪力墙在轴压力和逐步加载水平侧向力共同作用下的响应。试验结果表明:通过改变混凝土等级、截面配筋率、轴压比和墙肢截面高厚比等影响因素能提高试件的开裂、屈服和极限荷载,但应综合考虑其与变形能力、延性的关系。通过对影响试件的承载能力、变形能力及延性的几种因素:混凝土等级、截面配筋率、轴压比和墙肢截面高厚比的优化分析,找出其优化组合,为T形短肢剪力墙的设计提供一些建议和依据。更多还原

【Abstract】 According to the finite element theory and the computer simulative principle basic mentality, using finite element analysis software ANSYS,the load capacity,deformation capacity and ductility of T-shaped short-leg shear wall are tested by push-over simulative test,and carried on the optimized analysis to its influential factors.First 3D unit SOLID65 is used in ANSYS to establish the finite element analysis model of T-shaped short-leg shear wall.Then changing some influential factors such as concrete strength rank、reinforcement ratio、ratio of axial compressive force and sectional depth-thickness ratio,the simulative test is carried on the T-shaped short-leg shear wall.Though grouping comparison method the paper analyzes the influence of each factor to the load capacity,deformation capacity and ductility, as well as have the reasons why it leads to the influence,then carries on the optimized analysis, discovers the optimized value of each influential factor,and does the analysis to the broken process of T-shaped short-leg shear wall.When concrete strength rank、reinforcement ratio、ratio of axial compressive force and sectional depth-thickness ratio obtain the optimized value and the total reinforcement invariable situation, T-shaped short-leg shear wall added hidden column and hidden resistance are carried on the simulative test through changing the reinforcement ratio of the hidden column and hidden resistance section.Though grouping method,the paper analyzes the influence on changing reinforcement ratio to the load capacity,deformation capacity and ductility of the added hidden column and hidden resistance of T-shaped short-leg shear wall, and carries on the optimized analysis, discovers their optimized value. Finally, under the premise each influence factor obtains the optimized value, the load capacity, deformation capacity and ductility has carried on the comparison among T-shaped short-leg shear wall, the added hidden column and hidden resistance of T-shaped short-leg shear wall.The simulative test real reflect the response of T-shaped short-leg shear wall in the axial compression and gradually increasing horizontal side force together.The test result indicated that through changing concrete strength rank、reinforcement ratio、ratio of axial compressive force and sectional depth-thickness ratio influence factors can enhance the dehiscence, yield and limit load of the specimen, but should synthesize consider the relations among they and deformation capacity and ductility. Through optimized analysis of some influence factors :concrete strength rank、reinforcement ratio、ratio of axial compressive force and sectional depth-thickness ratio who affect the load capacity , deformation capacity and ductility, discovers its optimum composition,provides some suggestions and the basis for the design of T-shaped short-leg shear wall.更多还原