基于最优化算法的框-剪结构中剪力墙合理刚度研究

发布时间：2018-03-26 03:40

本文选题：框架-剪力墙结构　切入点：最优化算法　出处：《长沙理工大学》2014年硕士论文

【摘要】：框架-剪力墙结构是在框架结构中选择性的布置剪力墙,属于典型的双重抗侧力体系,在水平荷载作用下,如果某一部分受到破坏,则其余部分仍然可以提供足够的刚度及承载能力。用剪力墙作为结构中主要的抗侧力构件,不仅可以为结构提供较大的侧向刚度,而且也可以构成灵活自由的使用空间,容易满足建筑功能的要求。由于框架-剪力墙结构具有较强的适用性,是目前建筑设计中常采用的一种结构形式。在实际工程中,对于剪力墙的布置主要由设计人员根据自身的工程经验来完成的,这样的布置只是着眼于结构的参数是否满足规范要求,由于很多设计人员没有建立良好的优化意识,往往使得结构中布置的剪力墙刚度过大,不仅影响了结构的抗震性能,也使得结构的经济效益下降。本文主要针对框架-剪力墙结构中剪力墙的布置刚度进行研究,旨在找到经济性与安全性的平衡点,进而确定剪力墙的合理刚度。文中探讨了确定剪力墙合理刚度的必要性与重要性。当设防烈度较高、基本风压较小时,水平荷载主要为地震作用；当设防烈度较低、基本风压较大时,水平荷载主要为风荷载。根据水平作用力的这两种情况,分别建立数学优化模型,选用简单有效的最优化算法,利用MATLAB编程来求解剪力墙的合理刚度。文中提出当优化模型的约束条件较多时,可以采用区分主次的方式来简化约束条件。在求解地震作用下框架-剪力墙结构合理刚度的优化模型时,采用复合形法和随机方向法分别求解,比较两种算法的实用性的同时,也为算法在工程中的应用提供参考。最后对工程实例进行分析,利用文中的方法来确定剪力墙的合理刚度,表明选用的方法是简单实用的,计算程序可供初步设计或剪力墙刚度调整时使用。
[Abstract]:The frame-shear wall structure is a typical double lateral force resistant system, which is selectively arranged in the frame structure. Under horizontal load, if a part of the structure is destroyed, Then the rest of the structure can still provide enough stiffness and bearing capacity. Using shear wall as the main anti-lateral force member of the structure, not only can provide the larger lateral stiffness for the structure, but also can constitute a flexible and free space for use. It is easy to meet the requirements of building function. Because of the strong applicability of frame-shear wall structure, it is a kind of structural form commonly used in the present architectural design. The layout of shear wall is mainly completed by the designers according to their own engineering experience. This arrangement only focuses on whether the parameters of the structure meet the requirements of the code, because many designers have not established a good sense of optimization. The shear wall in the structure is just large, which not only affects the seismic performance of the structure, but also reduces the economic benefit of the structure. This paper mainly studies the arrangement stiffness of the shear wall in the frame-shear wall structure. In order to find the balance point between economy and safety, and then determine the reasonable stiffness of shear wall, the necessity and importance of determining reasonable stiffness of shear wall are discussed in this paper. When the fortification intensity is high and the basic wind pressure is small, the paper discusses the necessity and importance of determining the reasonable stiffness of shear wall. The horizontal load is mainly seismic, and when the fortification intensity is low and the basic wind pressure is high, the horizontal load is mainly wind load. According to the two cases of horizontal force, the mathematical optimization model is established, and the simple and effective optimization algorithm is selected. The reasonable stiffness of shear wall is solved by MATLAB programming. The constraint conditions can be simplified by distinguishing primary and secondary factors. When solving the optimal model of the reasonable stiffness of frame-shear wall structures under earthquake, the composite method and the random direction method are used to solve them respectively, and the practicability of the two algorithms is compared. It also provides a reference for the application of the algorithm in engineering. Finally, the paper analyzes the engineering example and uses the method in this paper to determine the reasonable stiffness of the shear wall. It shows that the method is simple and practical. The calculation program can be used for preliminary design or stiffness adjustment of shear wall.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.2

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