摘要
为满足某大型公共场馆的使用要求,需要对位于中轴线上的3根钢筋混凝土柱进行拆除,此举将使大梁的最大跨度从12m增大到24m。在考虑结构整体性能以及抗震性能的基础上,综合采取了增设支点柱、增大断面加固梁和粘贴碳纤维布的改造方案,同时采取了先改造加固后拆除柱的施工方案。施工安全监测结果表明:柱拆除后,梁、柱的应力进行了重分配,结构的整体挠度变形很小,结构的改造和加固是安全的。
To satisfy the function requirements of a large public building,three reinforced concrete columns on the central axis need to be removed,which caused the largest span of transverse beams to increase from 12m to 24m.Considering the structural integrity and seismic resistance,a retrofitting scheme was adopted,which included providing additional supporting columns,enlarging beams section and strengthening with carbon fiber sheets.During the construction,all the retrofitting and strengthening work were finished before the columns were removed.The construction safety monitoring shows that stress redistribution occurred to the columns and beams after columns removal.The overall deflection of structure was subjected to little change,which indicates that the retrofitted structure is safe.
出处
《施工技术》
CAS
北大核心
2013年第3期37-40,共4页
Construction Technology
基金
中国矿业大学力建学院青年基金(Lj2010QNJJ12)
江苏省土木工程环境灾变与结构可靠性重点实验室开放基金资助(JSKL2012YB01)
关键词
改造工程
抽柱
加固
设计
施工
reconstruction
column-removed
strengthening
design
construction
