外滩中信城Ⅰ期工程塔楼结构设计

外滩中信城Ⅰ期工程塔楼是一幢带伸臂加强层的外框小内筒的超高层办公建筑,采用RC核心筒 SRC外周框架柱 S框架梁的钢-混凝土混合型框筒结构体系.本文详细介绍了其结构设计过程,针对工程的结构特点,从结构选型、计算参数取值、计算分析、超限处理等方面进行了详述.     

面向绿色运维的建筑信息模型逆向设计法研究与实践

传统绿色建筑设计的流程难以满足绿色建筑运维发展的新需求,一定程度上限制了绿色建筑的持续快速发展。国内的设计单位正在积极探索新的设计方法寻求突破瓶颈,本文提出了基于建筑信息模型的绿色建筑运维的逆向设计法并通过实践展开相关探索和研究,通过建筑信息模型打通设计、施工和运维的数据,实现绿色运维落地。     

计及自由面兴波和螺旋桨非定常旋转效应的集装箱船舶绕流场计算研究

该文以商用软件FLUENT为平台,以KCS算例为对象,进行了计及自由面和螺旋桨非定常旋转效应的计算。考察了时间步长、自由面是否固化、湍流模式和网格数量、计算策略对计算结果的影响,确定了工程适用的计算方法,并应用于9000TEU集装箱船舶,与试验结果比较,吻合良好。     

逆向气流条件下半椭圆管外水平降膜厚度分布研究

为研究半椭圆管水平降膜厚度的分布规律,搭建逆向气流条件下水平降膜实验平台,并结合数字图像处理技术,研究逆流风速(0～5 m/s)和喷淋流量(0.025～0.221 L/min)对液膜厚度的影响。研究表明:逆向气流会对管外水膜产生影响,并存在临界速度;当逆流风速低于临界速度,液膜厚度沿圆周方向先减小后增大,与无空气流动时相似;当逆流风速超过临界速度时,液膜分布严重不均甚至被吹飞;随着逆流风速增大,平均液膜厚度先增大后减小;随着喷淋流量增大,平均液膜厚度持续增大;当喷淋流量减小、逆流风速增大时,平均液膜厚度减小。     

负载氯喹的骨靶向纳米颗粒打破肿瘤细胞增殖与骨吸收之间的恶性循环

肿瘤细胞增殖与骨吸收之间的恶性循环加剧了骨肿瘤的进展和转移风险.为此,我们设计并制备了聚乙二醇-阿仑膦酸钠修饰的聚多巴胺(PPA)纳米粒子,并在其表面负载自噬抑制剂氯喹(CQ),期望利用该治疗载体(PPA/CQ)打破肿瘤细胞增殖与骨吸收之间的恶性循环,从而有效地治疗骨肿瘤.实验证明,PPA/CQ可以有效地富集到骨组织,...     

Experimental and computational investigations on fire resistance of GFRP composite for building façade

Composite materials such as glass fibre reinforced polymers (GFRPs) possess the advantages of high strength and stiffness, as well as low density and highly flexible tailoring; therefore, their potential in replacing conventional materials (such as concrete, aluminium and steel) in building façade has become attractive. This paper addresses one of the major issues that hinder the extensive use of composite structures in the high-rise building industry, which is the fire resistance. In this study, a fire performance enhancement strategy for multilayer composite sandwich panels, which are comprised of GFRP composite facets and polyethylene foam core, is proposed with the addition of environmentally friendly, fire retardant unsaturated polyester resins and gel-coats. A series of burning experimental studies including thermo-gravimetric analysis (TGA) and single burning item (SBI) are carried out on the full scale composite sandwich as well as on single constituents, providing information regarding heat release rate, total heat release, fire growth rate, and smoke production. Experimental results are compared with fire safety codes for building materials to identify the key areas for improvements. A fire dynamic numerical model has been developed in this work using the Fire Dynamics Simulator (FDS) to simulate the burning process of composite structures in the SBI test. Numerical results of heat production and growth rate are presented in comparison with experimental observations validating the computational model and provide further insights into the fire resisting process. Parametric studies are conducted to investigate the effect of fire retardant additives on the fire performance of the composite sandwich panel leading to optimum designs for the sandwich panel.     

采用支撑后拆法的上海某超深基坑围护结构设计与分析

以上海地区某超深基坑工程为背景,介绍了基坑围护设计中支撑后拆法的应用。对设计及施工中存在的难点进行了分析,并针对性的给出处理、解决方案。对比分析了数值模拟、理论计算结果与工程实测数据,结果较为接近,监测数据无超过报警值情况发生,基坑开挖对周边环境的影响满足规范要求。采用支撑后拆法的基坑围护设计在本基坑工程实践中取得了良好的实施效果,值得在同类工程设计、施工中借鉴和参考。     

WinmineAssistant的开发与实践

用VB编程在Jorge一文的基础上进行改进,增加高级逻辑推理,从而使其更能模拟人工扫雷过程,更好地符合了Winmine的原型RLogic所代表的Logic(逻辑推理)的意思。此外,实现了Winmine中的Help功能,在玩者山穷水尽的时候,尽可能给出柳暗花明的提示,并且提供了就某局游戏的残局重现或实现与残局具有相同雷区分布的新局,从而实现模拟演练,可就某一局Winmine展开预操作,以及对开局提供帮助,避免开局的盲目性。     

Experimental study on critical breaking stress of float glass under elevated temperature

Cracking and subsequent fallout of glass may significantly affect fire dynamics in compartments. Moreover, the breaking tensile stress of glass, a crucial parameter for breakage occurrence, is the least well known among mechanical properties. In this work, a series of experiments were conducted, through mechanical tensile tests, to directly measure the breaking stress of float glass using Material Testing System 810 apparatus. Clear, ground and coated glass samples with a thickness of 6 mm were measured under ambient conditions, with a room temperature of 25 °C. The breaking stress of smooth glass samples was also measured at 75 °C, 100 °C, 125 °C, 150 °C, 200 °C, 300 °C and 400 °C, respectively. The results show that surface treatment may decrease the critical tensile stress of glass panes. The average breaking stress also fluctuates considerably, from 26.60 to 35.72 MPa with the temperature variations investigated here. At approximately 100 °C, critical stress reached the minimum value at which glass breakage occurs more easily. In addition, the thermal expansion coefficient was established using a thermal dilatometer, to obtain the maximum temperature difference float glass can withstand. It is intended that these results will provide some practical guidelines for fire safety engineers.     

基于BIM的自动化测量在陈翔路地道工程中的应用

本文在介绍BIM应用的基础上,以陈翔路地道工程为例,重点讲解了基于BIM技术的机器人全站仪技术的硬件应用。该应用结合了BIM技术,以BIM模型为基础,通过讲解全站仪机器人的优缺点以及研究在陈翔路项目中的实践应用,突出机器人全站仪在自动化施工测量的作用。最后对基于BIM技术的硬件应用提出展望。