摘要
某工程叠挑结构自下至上叠挑长度达21.1m,考虑平面大开洞,中部为单跨叠挑结构,采取加设钢支撑的措施提高其抗侧刚度,以减小结构在重力荷载作用下的水平侧移。由于建筑功能要求,角部叠挑部分没有连续的竖向构件,通过斜柱框架与错列桁架形成主传力体系,并对关键部位采取了加强措施,进行了抗连续倒塌概念设计。
The building is a complicated structure with floors overhanging longer than the floor below.The overhanging length from ground floor to roof is up to 21.1m.Because of openings in inner part of the floor,the overhanging parts in the middle of the structure have only one span behind the support.Steel braces are set up to enhance lateral stiffness and reduce lateral displacement of the overhanging structure under gravity.In addition,there are no continuous vertical bearing members in the corner of the structure due to architectural requirements.As main load transfer system and key parts of the corner,inclined column-beam-brace frames and staggered trusses are analyzed and strengthening measures are adopted.Progressive collapse analysis is also carried out.
出处
《广东土木与建筑》
2011年第6期3-6,共4页
Guangdong Architecture Civil Engineering
关键词
叠挑
水平侧移
错列桁架
抗连续倒塌设计
floors overhanging longer than the floor below
lateral displacement
staggered truss
design to resist progressive collapse
