地方高校建筑学专业执业应用平台的构建与运行研究

地方高等学校向应用技术类型高等学校转型的过程中,建筑学专业教学改革应面向执业应用,构建并不断优化与实践相对应的教学平台,树立以学生为本、以教师为主导的实践性教学平台构建思路,从课程设置、教学组织和校际合作等方面循序渐进地推进教学实践,逐步形成模块化的教学团队,搭建实践性教学体系的系列平台,突出执业应用教学体系的创新性、应用性、针对性和目的性。     

地方院校土木工程施工课程教学初探

简述了新建本科院校土木工程专业教学改革的必要性,从全面提升专业教师的工程能力、调整教学内容、重视课程设计的指导、改进实习方式等方面对地方院校土木工程施工课程教学进行了探讨,以适应现代高等教育发展的需要。     

Local buckling of steel plates in concrete-filled thin-walled steel tubular beam-columns

The availability of high strength steels and concrete leads to the use of thin steel plates in concrete-filled steel tubular beam-columns. However, the use of thin steel plates in composite beam-columns gives a rise to local buckling that would appreciably reduce the strength and ductility performance of the members. This paper studies the critical local and post-local buckling behavior of steel plates in concrete-filled thin-walled steel tubular beam-columns by using the finite element analysis method. Geometric and material nonlinear analyses are performed to investigate the critical local and post-local buckling strengths of steel plates under compression and in-plane bending. Initial geometric imperfections and residual stresses presented in steel plates, material yielding and strain hardening are taken into account in the nonlinear analysis. Based on the results obtained from the nonlinear finite element analyses, a set of design formulas are proposed for determining the critical local buckling and ultimate strengths of steel plates in concrete-filled steel tubular beam-columns. In addition, effective width formulas are developed for the ultimate strength design of clamped steel plates under non-uniform compression. The accuracy of the proposed design formulas is established by comparisons with available solutions. The proposed design formulas can be used directly in the design of composite beam-columns and adopted in the advanced analysis of concrete-filled thin-walled steel tubular beam-columns to account for local buckling effects.     

General behaviour and effect of rigid and non-rigid end post in stainless steel plate girders loaded in shear. Part I: Experimental study

To better understand the response of stainless steel plate girders loaded in shear, an experimental campaign was carried out at UPC as a part of extensive research on shear behaviour of stainless steel girders.A total of 8 stainless steel plate girders were tested. The primary design variables were, apart from the aspect ratio and slenderness of the web panel, the rigid or non-rigid condition of the end post. In parallel, a numerical model was developed in code ABAQUS [Hibbit, Karlsson and Sorensen Inc., ABAQUS/Standard, Version 6.3. User’s manual. Rhode Island (USA); 2002]. The tests results served as a basis for calibration of numerical models and furthermore for the development and verification of a new approach to structural stainless steel design.Different responses and modes of failure in shear were observed and special attention was taken of the effect of the rigidity of the end post during the analysis of results. The comparative analysis of the experimental results with current codes’ approaches clearly shows that shear design procedures included in Eurocode 3 Part 1.4 [European Committee for Standardisation. ENV 1993-1-4. Eurocode 3: Design of steel structures. Part 1.4: General rules—supplementary rules for stainless steel. Brussels; 1996], which specifically deals with stainless steel structures, are overly conservative.     

基于图像处理的图形轮廓自动识别技术研究

在工业精密尺寸检测问题中 ,由于工件的制造精度、破损和锈蚀 ,使得所获得的目标图像边缘粗糙且带有噪声 ,造成自动检测困难 .因此 ,精确提取目标边缘特性曲线已成为开发工业自动检测系统中的一个难题 .对图形轮廓线的自动识别进行了探讨 ,将图像作为函数来处理 ,应用到图像处理与模式识别中 ,并给出了一种识别算法 .本算法用VisualC + +语言编写实现 .图形轮廓线的自动识别是新一代CAD设计系统必不可少的基本功能 ,介绍了一种适用于任一 2D数据图形文件的轮廓线自动识别的新方法———局部坐标判别法 .实践证明 ,该方法简洁、可靠 ,不需要大量的运算 ,在自动识别中效果良好 .     

谈通信电源与空调及环境集中监控系统的应用

结合城域网通信工程的建设和通信设备的维护管理经验 ,提出了一种适合通信企业城域网动力及环境集中监控的解决方案 ,并就其系统结构、功能设置作了介绍 ,指出该系统的运行有效提高了铁路部门的维护质量和水平     

集中供热管网的监控系统

介绍了某热网监控系统的构成,阐述了监测中心和本地监控站的作用.     

独塔斜拉桥钢混结合段应力分析

以西安浐灞河生态区大门桥梁工程2号桥--双索独塔混合梁斜拉桥钢混结合段为例进行局部分析,讲述了采用有限元模型进行准确分析的详细方法,并对局部分析结果与整体分析结果进行了对比.     

初探南宋后期以重庆为中心的山地城池防御体系

在长达40多年南宋后期的抗蒙战争中,以重庆为中枢、合川钓鱼城为支柱建立的山地城池防御体系,依山为点,以江为线,点线结合,网状分布,层次分明,改变了单个城池布防的策略,最大限度地发挥出多重城池防守的作用,创造了一个军事战争史上的奇迹。文中通过对山地城池防御体系的初步研究,旨在探索因地制宜、据险设防的山地城池构筑原则;以及依山建城、环江为池,独具山地特色的南宋军事建筑艺术魅力。     

陕西省自然博物馆球幕影院网壳结构设计

较详细地介绍了直径 3 7 40m ,总高 3 0 2 7m的陕西省自然博物馆球幕影院的网壳设计过程。设计采用XJDST 1钢网架辅助设计软件 ,结构分析采用了基于U .L列式的薄壁构件空间梁 柱单元。除考虑网壳的强度、刚度外 ,还分析了单层球壳的屈曲模态和振动模态的形式 ,通过非线性分析 ,跟踪了网壳屈曲的全过程。针对该项目进行了风洞试验 ,利用球形网壳的风压云图进行了风载验算。设计方法可供同类工程参考。