扩展基础优化设计方法研究

发布时间：2018-06-02 00:25

本文选题：扩展基础 + 优化设计　；参考：《东北林业大学》2014年硕士论文

【摘要】：科学技术的不断创新,推动经济不断向前快速发展,人们对物质生存环境提出了更高的要求,而建筑是人类物质生存环境的重要载体。近年来,节能环保型社会建设理念的不断深入人心,进一步加剧了建筑的需求者和供应者对结构优化设计的需要。结构的优化设计,不仅满足了投资者控制建筑投资成本的目标,而且更加符合使用者对建筑本体功能的需求,从而实现了社会整体经济效益的最大化。因此,建筑结构的优化设计,在市场经济下的节能环保型社会越来越成为可行。本文针对扩展基础传统设计方法在优选过程存在中的不足之处,在明确以基础高度和基础底板配筋为扩展基础优化设计的设计变量后,确定以扩展基础的总造价(基础总造价为混凝土总造价与钢筋总造价之和)最低为最优指标的目标函数,和以基础底板的抗弯强度、抗冲切强度和抗剪强度作为优化设计中的约束条件,应用拉格朗日乘子法,提出了扩展基础的优化设计方法,有效地解决了传统设计方法(由主观假设基础尺寸到被动的承载力校核的设计过程)所带来的弊端。结果表明：提出的扩展基础的优化设计方法,不仅满足现行规范中对基础承载力要求,而且使基础造价最节约,达到安全经济的双重标准。这为扩展基础的优化设计提供一种新途径,据此已编制扩展基础优化设计程序,可以减少设计人员的工作量,将会产生一定的经济效益。
[Abstract]:The continuous innovation of science and technology promotes the rapid development of economy, and people put forward higher requirements for material living environment, and architecture is an important carrier of human material living environment. In recent years, the idea of energy-saving and environment-friendly society has been deeply rooted in people's mind, which further intensifies the needs of the building demanders and suppliers for structural optimization design. The optimal design of the structure not only meets the goal of controlling the investment cost of the building by investors, but also meets the needs of the users for the function of the building ontology, thus realizing the maximization of the overall economic benefits of the society. Therefore, the optimization design of building structure is becoming more and more feasible in the energy saving and environmental protection society under the market economy. In this paper, aiming at the shortcomings of the traditional design method of extended foundation in the process of optimization, after defining the design variables of the optimum design of the extended foundation, the height of the foundation and the reinforcement of the foundation plate are defined. Determining the objective function of the minimum of the total cost of the expanded foundation (the sum of the total cost of the foundation and the total cost of the reinforcement) as the optimum index, and the flexural strength of the foundation slab, The impact shear strength and shear strength are the constraints in the optimization design. The Lagrange multiplier method is applied to the optimization design of the extended foundation. The drawback of traditional design method (from subjective assumption of foundation size to passive bearing capacity checking process) has been solved effectively. The results show that the proposed optimization design method not only meets the requirements of foundation bearing capacity in the current code, but also makes the foundation cost the most economical, and achieves the double standard of safety and economy. This provides a new way for the optimization design of the extended foundation, according to which a program has been compiled for the optimization design of the extended foundation, which can reduce the workload of the designers and will produce certain economic benefits.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU47

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