基于ANSYS钢筋混凝土变截面悬臂梁优化设计
发布时间：2018-11-01 16:57
【摘要】：在21世纪的今天，建筑结构设计节能环保已成为到各国科学家着手研究的课题之一。结构优化设计就是从这一思考方向向前发展的，目前，在工程领域，建筑的安全与投资的效益是评价建筑是否合理的两个主要方面，，即如何保证建筑的安全生产，又能最大程度的减少建筑的造价。ANSYS作为一种强大的有限元软件，能够为设计人员在结构优化方面提供更先进的优化方法，大大减少了繁冗的计算过程，同时降低了计算误差，更加精确的模拟建筑结构受力情况，不仅为设计人员赢得了宝贵的时间，还提供了一种更加精确的优化方法。 本论文就是以钢筋混凝土变截面悬臂梁为研究对象，依据《混凝土结构设计规范》的要求，分别从构件强度、位移、构造方面对结构进行设计，考虑矩形截面悬臂梁的受力特征进行形状优化，以悬臂梁的自由端与固定端截面尺寸，纵向钢筋配筋率和配箍率为优化变量，以钢筋混凝土变截面悬臂梁造价为优化目标，通过大型通用有限元软件ANSYS对悬臂梁建立模型并优化设计计算，运用了有限元法中的一阶方法，得到了悬臂梁最大应力、最大弯矩和最大位移等计算结果，与理论值进行对比，从而可知结果与理论值非常接近，说明了优化结果是有理论基础的。最后通过优化计算获得了钢筋混凝土变截面悬臂梁的最优截面尺寸以及最优的构件造价，然后与传统的优化设计结果进行对比，从研究成果中得到，通过ANSYS软件优化设计得到的结果要比在优化前节约了近4%。本论文均是按照设计规范进行受力分析以及建立数学模型的，对设计人员是有一定的参考价值。
[Abstract]:In the 21 st century, energy-saving and environmental protection of building structure design has become one of the subjects that scientists all over the world begin to study. Structural optimum design develops from this direction of thinking. At present, in the field of engineering, the safety of construction and the benefit of investment are the two main aspects to evaluate whether the building is reasonable, that is, how to ensure the safety of building production. As a powerful finite element software, ANSYS can provide a more advanced optimization method for designers in structural optimization. More accurate simulation of structural stress not only wins valuable time for designers, but also provides a more accurate optimization method. In this paper, the cantilever beam with variable section of reinforced concrete is taken as the research object. According to the requirements of the concrete structure Design Code, the structure is designed from the strength, displacement and construction of the member, respectively. Considering the stress characteristics of cantilever beam with rectangular section, the shape of cantilever beam is optimized. The dimensions of free end and fixed end of cantilever beam, the ratio of longitudinal reinforcement and hoop are taken as optimization variables, and the cost of cantilever beam with variable section of reinforced concrete is taken as the optimization objective. The model of cantilever beam is established and optimized by ANSYS, and the results of maximum stress, maximum bending moment and maximum displacement of cantilever beam are obtained by using the first order method of finite element method, and the results are compared with the theoretical values. Therefore, the result is very close to the theoretical value, which shows that the optimization results are theoretically based. Finally, the optimal section size and the optimal component cost of the RC cantilever beam with variable cross section are obtained through the optimization calculation, and then compared with the traditional optimal design results, the results are obtained from the research results. The results obtained by the optimization design of ANSYS software are nearly 4 saving than that before optimization. This paper is based on the design code for force analysis and mathematical model, which is a certain reference value for designers.
【学位授予单位】：辽宁工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375.1
本文编号：2304529
[Abstract]:In the 21 st century, energy-saving and environmental protection of building structure design has become one of the subjects that scientists all over the world begin to study. Structural optimum design develops from this direction of thinking. At present, in the field of engineering, the safety of construction and the benefit of investment are the two main aspects to evaluate whether the building is reasonable, that is, how to ensure the safety of building production. As a powerful finite element software, ANSYS can provide a more advanced optimization method for designers in structural optimization. More accurate simulation of structural stress not only wins valuable time for designers, but also provides a more accurate optimization method. In this paper, the cantilever beam with variable section of reinforced concrete is taken as the research object. According to the requirements of the concrete structure Design Code, the structure is designed from the strength, displacement and construction of the member, respectively. Considering the stress characteristics of cantilever beam with rectangular section, the shape of cantilever beam is optimized. The dimensions of free end and fixed end of cantilever beam, the ratio of longitudinal reinforcement and hoop are taken as optimization variables, and the cost of cantilever beam with variable section of reinforced concrete is taken as the optimization objective. The model of cantilever beam is established and optimized by ANSYS, and the results of maximum stress, maximum bending moment and maximum displacement of cantilever beam are obtained by using the first order method of finite element method, and the results are compared with the theoretical values. Therefore, the result is very close to the theoretical value, which shows that the optimization results are theoretically based. Finally, the optimal section size and the optimal component cost of the RC cantilever beam with variable cross section are obtained through the optimization calculation, and then compared with the traditional optimal design results, the results are obtained from the research results. The results obtained by the optimization design of ANSYS software are nearly 4 saving than that before optimization. This paper is based on the design code for force analysis and mathematical model, which is a certain reference value for designers.
【学位授予单位】：辽宁工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375.1
【参考文献】
相关期刊论文 前6条
1 许素强,夏人伟;结构优化方法研究综述[J];航空学报;1995年04期
2 曾寿金;江吉彬;高诚辉;;基于ANSYS分析的悬臂梁结构优化设计[J];机电技术;2006年04期
3 罗世谋;钢筋混凝土最佳经济梁高的探讨[J];基建优化;2005年01期
4 顾元宪,程耿东;结构形状优化设计数值方法的研究和应用[J];计算结构力学及其应用;1993年03期
5 许素强，夏人伟;桁架结构拓扑优化与遗传算法[J];计算结构力学及其应用;1994年04期
6 夏学文;张俊彦;郭小刚;张仁亮;;基于ANSYS的结构优化设计理论[J];煤矿机械;2011年03期
本文编号：2304529
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2304529.html
