复杂截面型钢混凝土组合结构工程施工

清华大学经管学院教学科研楼工程结构型式新颖独特.主体结构梁、柱和剪力墙采用钢骨混凝土组合结构,钢骨有H形、十字形、王字形及钢板剪力墙等,截面形式复杂,施工难度大.施工中采用BIM技术查出主要劲性节点钢筋与钢骨碰撞点;确定碰撞处理原则后进行二次施工深化设计;根据深化图进行型钢构件与钢筋的制作和施工,高质量完成了工程钢骨混...     

型钢混凝土组合结构钢骨开孔与穿筋深化设计

甘肃省会展中心五星级酒店工程主体结构采用箱形钢管混凝土柱+钢框架梁+H型钢混凝土简体组合结构,地下为劲性钢-混凝土组合结构.本工程钢结构构件截面种类多,连接节点类型多、构造复杂.重点介绍了钢骨柱穿筋孔、钢骨梁穿筋孔以及钢骨其他开孔的形式,以及组合结构节点设计原则.另外指出,钢结构制作加工时,需预留穿筋孔眼,钢骨开孔要本着连接节点构造简单、等强受力、便于施工的原则.     

深圳平安金融中心巨型钢骨混凝土组合结构施工技术

深圳平安金融中心采用巨型钢骨混凝土组合结构,其钢骨体积、重量巨大,节点区钢筋与钢骨连接复杂,模板支设及腔内混凝土灌浆施工困难。针对组合结构的施工难点,巨型钢骨柱采用合理分段原则,对组合节点区钢筋与钢骨连接节点进行了深化设计,采取了复杂腔体灌浆措施及模板支设工艺,施工效果良好。最后提出了创新钢骨与混凝土组合形式的建议。     

高层钢结构钢骨混凝土地下室结构体系

目前很多高层钢结构的地下室采用钢骨混凝土柱和钢筋混凝土梁的结构体系,由于地下室通常都存在钢筋混凝土梁板、剪力墙、地下室外墙,这些混凝土构件与钢骨混凝土柱的连接做法往往较为复杂,尤其是混凝土梁纵向钢筋在梁柱节点处的锚固、钢骨柱的垂直度控制等问题。对这种结构体系的各类节点的受力特点和构造进行深入分析并不断改进,通过在钢骨柱侧面设置牛腿以及在地下室顶板处设置拉结钢梁分别解决了混凝土梁纵向钢筋的锚固问题和钢骨柱的垂直度问题。     

钢骨混凝土构件的受力性能研究综述

根据国内外对钢骨混凝土结构的研究,介绍了钢骨混凝土结构的发展和特点,钢骨与混凝土的共同工作,梁、柱构件的正截面和斜截面受力性能、刚度和裂缝、抗震性能及其有关计算理论,梁柱节点的受力性能和适合我国工程应用的梁柱节点连接构造形式及试验研究,还介绍了钢骨混凝土结构在我国的工程应用情况.     

某复杂SRC核心筒结构施工节点深化设计

钢骨混凝土(SRC)结构结合了钢结构和混凝土结构的优点,在高层建筑框架结构体系中广泛应用.结合实际工程,从节点处刚接和铰接方式选择、剪力墙与SRC柱的节点构造及SRC暗柱与暗梁节点构造等方面,介绍了其对结构施工的影响.进一步阐述了钢骨柱的制作流程和施工要点,以及施工中可能出现的问题和采取的相应措施.     

中广大厦底部钢骨混凝土结构设计

结合兰州中广大厦超限高层框支剪力墙的优化设计 ,探讨了钢骨混凝土组合结构的设计、计算方法 ,并着重介绍了钢骨混凝土柱、钢骨混凝土柱与钢筋混凝土梁之间的节点构造设计 ,可供设计人员参考     

全预制装配整体式剪力墙结构住宅施工技术

全预制装配整体式剪力墙结构(NPC体系)技术是一种新型结构体系,其竖向构件剪力墙、柱采用预制,水平构件梁、板采用叠合形式;竖向构件连接节点采用浆锚连接,水平构件与竖向构件连接节点及水平构件间连接节点采用预留钢筋叠合现浇连接,形成整体结构体系.以南通市海门中南世纪城33号楼为试点,介绍其施工技术.     

装配式混凝土结构体系研究及探讨

为解决装配式混凝土结构竖向构件连接质量不易保证、成本偏高等问题,提出了一种新型的装配式混凝土结构体系,并阐述了该结构体系的总体思路及其结构构件预制、梁柱节点连接及装配施工做法.该结构体系采用"半装配"施工方法,柱预制件采用钢管空腔柱,剪力墙预制件采用钢管空腔柱与斜撑的组合,梁预制件采用凹槽梁,梁预制件的钢筋可通过预留洞口伸入柱预制件空腔;现场将各预制构件装配完成后,再在预制构件的空腔及凹槽中现浇混凝土.这种做法可同时发挥现浇式及装配式结构的优点,相对于目前的装配式混凝土结构,不仅施工方便、竖向构件连接可靠,而且可减小预制构件的重量,降低运输及吊装成本.     

全预制装配整体式剪力墙住宅结构设计及应用

全预制钢筋混凝土装配整体式结构(NPC)技术体系竖向构件剪力墙、柱采用预制,水平构件梁、板采用叠合形式;竖向构件节点采用浆锚连接,水平构件与竖向构件节点采用预留钢筋叠合现浇连接,形成整体结构体系.以南通市海门中南世纪城33号楼为试点工程,介绍该体系原理、技术特点及具体的连接节点施工工艺.指出剪力墙与板及剪力墙层间形成刚性连接节点;剪力墙与梁及梁与板采用预制梁槽、叠合现浇的形式;剪力墙水平连接及梁连接分为多种节点形式.     

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。     

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。     

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…     

浅谈我国工程项目建设成本控制存在的问题

结合目前我国施工企业工程项目成本管理现状,对工程项目成本管理过程中存在的问题进行了较详细的分析,并提出了一些解决问题的办法,以做好项目成本控制工作,进而增强企业经济实力。     

Variation in property taxation in Tulsa

Conclusions It may be reasonably concluded from this study that the range of variation in these ratios of assessed to actual value are of a reasonable size for the great majority of cases. The frequency distribution of these sample ratios was not normal, however, as was assumed a process of this type would produce. On the other hand, the failure of the regression analysis to identify any significant variables which would explain these variations would tend to re-enforce the assumption that the fluctuations were indeed of a random nature.To sum it up in one paragraph, aside from a few extreme cases, the assessing process appears to give estimates which are more consistent than would be expected under the assumption that any errors would be of a random nature, but the regression analysis was unable to isolate any particular socioeconomic characteristics which would explain the variation which was present.Financial support for this research project was furnished by the University of Tulsa.