H 形截面杆件单层网壳设计建造关键技术.pdf

2016 年 11 月上第 45 卷第 21 期施工技术CONSTUCTION TECHNOLOGY61DOI:10.7672/sgjs2016210061澳门美高梅路氹酒店 H 形截面杆件单层网壳设计建造关键技术谢向阳，陈果，殷磊(中国建筑工程(澳门)有限公司，澳门999078)摘要澳门美高梅路氹酒店中庭采光天幕，采用三峰两谷的不对称多曲面网壳构型，以焊接 H 型钢作为基本杆件。为满足天幕承载力要求及预设基座抗力条件、解决 H 形截面杆件的空间不规则连接形式所带来的问题，设计阶段采用了释放双向水平约束的铰接支座、双层空心六棱柱节点等较为特殊的结构方式。为保证加工安装精度，采用了编程建模、三维拟合预拼装等方法;施工阶段采取了轻型点式胎架等技术措施，以解决吊装场地、设备的条件限制，在卸载阶段进行了 3 种方案的有限元模拟分析和比选。关键词钢结构;网壳;屋面;滑动支座;设计;施工 中图分类号TU758 文献标识码A 文章编号1002-8498(2016)21-0061-05Key Technology in Design and Construction of Single-layer eticulated Shellof H-section Units in MGM esorts Development LCC，MacauXie Xiangyang，Chen Guo，Yin Lei(China Construction Engineering(Macau)Co，Ltd，Macau999078，China)Abstract:The spectacle roof of the MGM esorts Development LCC，Macau is a single-layer reticulatedshell structure which is mostly consisted of welded-H-section members，and has asymmetric specialsurface with three peaks and two valleys Some special countermeasures such as supports with bothrelease of the horizontal constraints and hexagonal prism joints are adopted in design phase to meet theload bearing requirements，preset pedestal resistance conditions and the complex mode due to spatiallyirregular connecting of H-section membersIn fabrication and erection stages，three-dimensionalmodeling technology and pre-assembly method are used for the assurance of the rigorous accuracyrequirement;in the erection stage，a new-style supporting system of point-style scaffold is created to meetthe limited both site and machinery conditions;in the off-load stage，three off-load schemes are comparedto elect applying the nonlinear finite element methodKey words:steel structures;shells;roofs;sliding bearing;design;construction作者简介谢向阳，高级工程师，E-mail:178564280 qq com收稿日期2016-01-04网壳以杆件为基础，按一定规律组成网格，按壳体结构布置形成空间构架，其兼具杆系和壳体的性质，是大跨度结构较理想的结构形式之一，是一种国内外颇受关注、有广阔发展前景的空间结构。澳门美高梅路氹酒店中庭采光天幕，在建筑外观设计时即要求其风格的独树一帜性，概念设计阶段选定了“三峰两谷”的不对称双曲面网壳构型;同时，为营造独特室内光影视觉效果，确定采用 H 型钢作为网壳的基本构件。为实现这样的设计效果，结构设计、加工建造出现了一系列挑战。最终工程的成功实施，也标志着在设计方法、施工技术等方面实现了诸多突破和创新，形成了一系列的设计、建造关键