CONSTRUCTION MONITORING AND PERFORMANCE ANALYSIS OF AN UNDERPINNING BRICK-CONCRETE STRUCTURE
-
摘要: 由于建筑结构功能改变,将某砖混结构教学楼通过墙体托换技术改造成大空间办公楼。为保证托换体系施工过程的安全性,采用光纤光栅技术(FBG)和分布式光纤应变传感技术(BOTDA),对托换体系的托换梁及加固柱进行施工全过程的应力-应变监测,并分析了托换体系的工作性能。监测结果表明:墙体拆除后设计的托换体系各组成构件均能参与结构受力,并具有足够的强度储备。Abstract: Due to the change of structural function, one teaching building had to be retrofitted to a large-space office building.The underpinning technology had been adopted to transform this brick-concrete structure to a frame structure.In order to ensure its safety operation, fiber bragg grating technology(FBG) and distributed optical fiber sensor(BOTDA) had been used to monitor structural stress and strain during the whole period of construction.The test results show that the designed underpinning system performances well and can provide sufficient bearing capacity for this new retrofitted structure.
-
Key words:
- reinforcement /
- retrofit /
- underpinning technology /
- construction monitoring /
- FBG /
- BOTDA
-
林飞,唐颖.托梁换柱施工技术在砖柱框架结构房屋改造中的运用[C]∥首届全国既有结构加固改造设计与施工技术交流会论文集.2007. [2] 李雁,吕恒林,殷惠光.托换技术在砖混结构加固改造中的应用[J].建筑技术,2008,39(5):339-342. [3] 程远兵,王三会.两种简易可行的砖墙托换梁[J].四川建筑科学研究,2005,31(4):44-47. [4] 蔡一鸣.砖混结构的二次加固改造设计与施工技术[J].建筑结构,2010(2). [5] 向波,张圣华,文双玲.某砖砌体结构办公楼大空间门厅改造施工[J].工业建筑,2007,37(6):95-97. [6] 金伟良,毛江鸿,何勇.混凝土内部应变分布式光纤实时检测方法及试验研究[J].土木建筑与环境工程,2011(1):1-6. [7] 邵剑文.砖柱组合托换梁受力模式及荷载传递方式研究[J].建筑结构,2011(10). [8] JGJ 1162009建筑抗震加固技术规程[S]. [9] 周智,武湛君,赵雪峰,等.混凝土结构的光纤光栅智能监测技术[J].功能材料,2003(3):344-348. [10] 何勇,邢锋,毛江鸿,等.基于 BOTDA 的钢筋应力实时监测方法[J].深圳大学学报:理工版,2010(3):291-295.
点击查看大图
计量
- 文章访问数: 58
- HTML全文浏览量: 3
- PDF下载量: 93
- 被引次数: 0