高层建筑混凝土结构转换层剪力墙设计

高层建筑混凝土结构转换层,由于施工设计简单和受力明确,广泛应用于高层建筑剪力墙结构体系施工当中.本文主要研究底部大空间剪力墙结构计算、剪力墙转换层楼板结构设计、剪力墙转换层框支梁结构设计.     

深圳招商环贸中心T3塔楼结构设计

环贸中心项目结构存在扭转不规则、构件间断、刚度突变、局部穿层柱等超限内容,采用YJK和ETABS软件对结构进行多遇地震下和设防地震下的可行性分析、楼板应力分析、跨层柱屈曲分析,采用SAUSAGE软件进行结构动力弹塑性分析、弹塑性楼板应力分析,采用ABAQUS软件进行转换结构、复杂节点分析等结构专项研究.分析计算结果可知,结构设计成功解决了结构超限问题,结构设计安全可靠.     

天津某商业综合体结构设计

近年来,随着商业的快速发展,城市商业中心在大中型城市中的中心地位越来越凸显。商业中心的功能越来越多样化与复杂化,而在满足建筑功能的多样化的同时,建筑师对于建筑效果的追求也越来越高,楼板大开洞、穿层柱、大悬挑等不规则情况越来越多的出现在结构设计当中,这对结构设计则提出了更高更难的技术要求,将结合实际工程的结构设计过程分析在遇到楼板大开洞的情况下,楼板刚性假定和弹性楼板在结构设计中对结构整体的影响。     

高层建筑梁式转换层结构设计原理及其应用思考

针对高层建筑梁式转换层结构的设计原理、设计特点、设计原则展开讨论,分析了高层建筑梁式转换层结构设计要点,内容涉及结构抗震设计、结构布局设计、结构受力设计、转换梁截面设计、框支柱截面设计、转换层楼板设计、结构类型选择等,通过研究钢骨混凝土转换结构、预应力混凝土转换层的应用要点,其目的在于积累高层建筑梁式转换层结构设计经验,提升结构施工结果的稳固性。     

某带高位转换的框支剪力墙结构设计

结合无锡蓝庭国际在层8转换的部分框支剪力墙结构设计,分析了带高位转换结构的竖向规则性,发现在转换层处,框支柱、剪力墙存在剪力突变,转换层下一层与转换层刚度比小于50%。结合该工程设防类别及规则性,针对结构和关键构件提出不同的抗震性能设计目标。对转换层及其上下层楼板在各级地震作用下的楼板应力进行了分析,并给出了便于工程应用的转换层楼板配筋计算方法。合理布置结构,避免结构刚度柔软层为承载力薄弱层。弹塑性分析表明,经过合理布置后的结构无明显薄弱层,具有良好的屈服机制。     

交通银行某分行营业大楼超限结构设计分析

结合交通银行某分行营业大楼的超限结构设计过程,梳理其结构设计步骤,即针对结构的扭转位移比大于1.2、塔楼质心偏置、凹凸不规则、楼板有效宽度50%、大悬挑梁上起柱、穿层柱等多项不规则结构特征,提出合理布置抗侧力构件、提高楼板配筋率、楼板应力分析、支撑挑柱、提高穿层柱性能目标等应对抗震加强措施。结果表明,该工程采用的结构应对抗震加强措施是合理、安全、有效的,能实现相关规范规定的结构抗震设防设计目标。     

某多层钢结构学生公寓结构设计

全面介绍某6层钢结构学生公寓的结构设计方法、结构体系选用、计算假定、节点构造、楼板设计,并对该工程进行了经济性分析。     

基于舒适度的钢桁架-混凝土组合楼板动力特性研究

大跨楼盖结构的振动舒适度问题在结构设计中不可忽视,钢桁架-混凝土组合楼板是大跨结构中常用的楼板形式.针对该类型楼板的振动舒适度问题,建立简化层合梁模型以及精细的层合板模型,分析结构动力特性的影响因素和影响机理,并建立某真实结构的参数化有限元模型,计算细部构件对楼板振动频率影响规律.研究表明:当混凝土板和钢桁架的弹性模量...     

论高层住宅结构设计中常见的几个问题

本文结合结构设计实际工作,分析了商层住宅结构设计中基础形式的选择对比、限制结构的扭转效应、转角窗构造处理、高层建筑平面凹入较深时构造处理、不规则楼板的计算等问题,以求达到满足高层住宅结构的安全性、可靠性要求的目的。     

河南省某县文化艺术中心结构设计

河南省某县文化艺术中心地上4层,局部地下1层,结构高度为23.7m,采用混凝土框架-剪力墙结构体系。上部结构平面为近似旋转对称的切角三角形,边长约为180m,结构超长不设缝。结构存在扭转不规则、楼板不连续、竖向构件不连续等不规则情况,属于特别不规则的多层建筑结构。系统介绍了本项目结构设计的情况,并对关键问题进行了阐述和分析,包括楼层扭转位移比的正确统计、悬挑桁架验算及楼板在温度和地震工况下的应力分析,确保了结构设计的准确性和合理性。     

浅析高速公路工程招投标中的最低评标价法

结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。     

Place-Making in Megaprojects in Melbourne

This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer.     

Pathogens in septage in Vietnam

Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l^− 1, and were detected in all septage sludge samples with an average of 16,000 ova l^− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage.     

在市场中实践在实践中学习在学习中进步--工程公司市场化进程的回顾与展望

近两年来，工程公司在提高市场竞争意识、推动市场化进程中做了大量工作，其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。     

新时期广东城市化的新特点

新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。     

2005年北京办公物业市场七大趋势

趋势一:CBD区域写字楼集中放量从各区域规划方案上看,CBD区域多数项目在03～04年处于项目的报批手续及拆阶段,预计2005年正式推向市场,因此2005年CBD区域将成为北京市场供应集中的域,区域即将供应的项目有北京财富中心(二期)、金地国际花园、万达广场、SOHO尚都、万通中心、世纪财富中心、怡禾国际中心、光华国际等。除去未知项目,2005CBD写字楼办公面积的供应量为60万平方米左右。中关村区域经过一段时间的集中供后开始逐步放缓,2005年供应的体量相对较大的项目有中关村金融中心、新中关。金街区域可能开盘的项目只有2个:英蓝国际中…     

Developments in immersed tunnelling in Holland

Holland has 22 immersed tunnels (14 road, 5 rail and 3 utilities tunnels). Another three are under construction, and more are foreseen. The tunnels are of the concrete type, i.e., constructed without a steel shell. The paper describes developments in technology and in design philosophy since the first immersed tunnel was completed 52 years ago. These developments include, amongst others: the introduction of the Gina rubber gasket between elements; the division of elements into sections divided by flexible joints; the application (if possible) of longer elements (up to 268 m); the use of precast sections for tunnels that have a small cross-section; the omission of the watertight lining (made possible by cooling the concrete of the walls during the first days after pouring); various foundation methods (e.g., sand flow instead of sand jet system; piled foundations when necessary); the use of the excavation for the open ramps (or the part of the tunnel built on land) as a casting basin for the elements; the changed approach to casting basins now that well pumping is usually forbidden; and the transport of the elements across shallow locations and across the sea. It is emphasized that the current state of immersed tunnel technology is the result of a continuous international exchange of ideas and experiences.     

新形势下高校强化基建财务管理的探讨

在市场条件下高校基建财务人员在加强日常财务管理的同时,必须树立起高度的工作责任心,抓好事前监督、事中监督、事后监督三个环节,全面理解、贯彻执行《高等学校财务制度》,管好用好各项基本建设资金,提高基建财务管理水平,更好地完成高校各项基建任务,以有限的投资,最快的建设速度,获得最大的投资效益。