点支式玻璃幕墙驳接件力学性能研究及结构优化设计

发布时间：2018-01-12 18:11

本文关键词：点支式玻璃幕墙驳接件力学性能研究及结构优化设计　出处：《山东建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：点支式玻璃幕墙是一种典型的建筑外维护结构,由玻璃面板、支承结构体系、驳接件和密封材料等组成。点支式玻璃幕墙的玻璃面板通过驳接件与支承结构连接在一起,驳接件结构力学性能的优劣对点支式玻璃幕墙的安全性及稳定性有着直接影响。目前工程上使用的驳接件普遍存在结构单一、形式笨重的现象,对驳接件进行力学性能研究及结构优化设计对提高点支式玻璃幕墙的安全性、美观性及经济性具有非常重要的意义。本文针对点支式玻璃幕墙的重要结构部件—驳接件开展研究工作,分析其在受到荷载作用下的力学性能,并对其进行疲劳寿命模拟和结构优化设计,主要研究内容如下:(1)根据金属疲劳性能理论及结构件疲劳寿命的有限元分析方法,借助有限元软件对目前工程中常用的驳接爪和驳接头进行静力特性分析和疲劳寿命模拟,分析得出目前工程中使用的驳接爪存在结构不合理、材料浪费的现象比较明显,且驳接爪疲劳寿命受风荷载的影响较大;驳接头结构相对合理,疲劳寿命受风荷载的影响不大,应重点对驳接爪结构进行优化设计。(2)以现代优化设计方法理论为基础,结合有限单元法的思想和应用,提出针对点支式玻璃幕墙驳接件的结构优化与尺寸优化相结合的优化设计方法。1)根据对工程中常用驳接爪的力学特性及疲劳寿命模拟结果,寻找驳接爪结构优化方向。研究分析了X型驳接爪、H型驳接爪和V型驳接爪三类不同结构形式驳接爪的力学特性和疲劳寿命,分析结果显示X型驳接爪综合性能优于H型和V型驳接爪。2)以X型驳接爪为研究对象,研究驳接爪爪臂截面形状变化时,对驳接爪的静力性能及疲劳寿命的影响。在保证爪臂截面面积相同的情况下,研究分析了爪臂截面形状为梯形、正方形、圆形、竖矩形和横矩形时驳接爪的静力特性和疲劳寿命,研究结果表明爪臂截面形状为圆形的驳接爪综合性能优于其他形状的驳接爪。3)分别研究爪臂截面形状为梯形和圆形时的驳接爪,爪臂尺寸变化时对驳接爪的静力性能和疲劳寿命的影响。研究分析了当爪臂尺寸L为200mm、250mm和300mm情况下时驳接爪的力学性能和疲劳寿命,结果表明,随着尺寸L的增大,驳接爪综合性能变优,爪臂截面形状为圆形的驳接爪其尺寸L=300mm时具有最好综合性能。(3)依据浮头式驳接头结构特点,设计了相对应的沉头式驳接头。研究两类不同结构的驳接头的静力特性及疲劳寿命,结果表明沉头式驳接头静力特性较浮头式驳接头静力特性更好。(4)为了验证本文的研究结论,对一实际工程中使用的驳接件进行静力特性分析,设计爪臂截面形状为梯形的H型结构驳接爪和爪臂截面形状为圆形的X型结构驳接爪,分别与原工程中采用的爪臂截面形状为梯形的X型结构驳接爪进行分析比较,分析结果一致。
[Abstract]:The point-supported glass curtain wall is a typical external maintenance structure, which is supported by glass panels. The glass panel of the point-supported glass curtain wall is connected with the supporting structure through the connection piece. The mechanical properties of the connection structure have a direct impact on the safety and stability of the point-supported glass curtain wall. The mechanical properties of the connecting parts and the structural optimization design are studied to improve the safety of the point-supported glass curtain wall. Aesthetics and economy are of great significance. In this paper, the mechanical properties of point-supported glass curtain wall, which is an important structural component of glass curtain wall, is studied and its mechanical properties under load are analyzed. The fatigue life simulation and structural optimization design are carried out. The main research contents are as follows: 1) according to the theory of metal fatigue performance and the finite element analysis method of fatigue life of structural parts. With the help of finite element software, the static characteristic analysis and fatigue life simulation of the commonly used gripper and barge joint are carried out, and the results show that the existing structure of the gripper used in the current engineering is unreasonable. The phenomenon of material waste is obvious, and the fatigue life of gripper is greatly affected by wind load. The structure of barge joint is relatively reasonable and the fatigue life is not affected by the wind load. The emphasis should be placed on the optimum design of the clawed structure based on the theory of modern optimization design method. Combined with the idea and application of finite element method. An optimization design method combining structural optimization and dimension optimization for point-supported glass curtain wall connections is proposed. The simulation results of mechanical properties and fatigue life of common joints in engineering are presented. The mechanical properties and fatigue life of three different types of clawing, namely X type and V type, are studied and analyzed. The analysis results show that the comprehensive performance of X type paw is better than that of H type and V type paw. 2) taking X type paw as research object, the change of cross section shape of clawing claw arm is studied. The influence on the static performance and fatigue life of the gripper. Under the condition that the cross section area of the claw arm is the same, the section shape of the claw arm is trapezoid, square and circular. Static characteristics and fatigue life of clawing with vertical rectangle and cross rectangle. The results show that the comprehensive performance of the paw with circular cross section is better than that of the paw with other shapes. 3) the pawl with trapezoidal and circular cross section is studied respectively. The influence of the size change of the claw arm on the static performance and fatigue life of the gripper is studied. The size L of the paw arm L is 200mm. The mechanical properties and fatigue life of the gripper are obtained under the conditions of 250mm and 300mm. The results show that with the increase of the size L, the comprehensive properties of the gripper become better. The pawl with circular section has the best comprehensive performance when its size is 300 mm) according to the structural characteristics of floating head type barge joint. The static characteristics and fatigue life of two kinds of barge joints with different structures are studied. The results show that the static characteristics of the sunk head type barge joint is better than that of the floating head type barge joint. In order to verify the conclusion of this paper, the static characteristic analysis of a practical engineering connection is carried out. The H-shaped structure with trapezoidal cross section and the X-shaped claw with circular cross section are designed. The results are consistent with those of X type structure with trapezoidal cross section used in the original engineering.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU382

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