火荷载作用下足尺混凝土连续板振动特性的实验研究  

Experimental Study of Vibration of Continuous RC Slabs under Fire

作　　者：王为[1] 李兵[2] 董毓利[2,3] 

机构地区：[1]中国市政工程东北设计研究院咨询公司,长春130021 [2]哈尔滨工业大学土木工程学院,哈尔滨150090 [3]华侨大学土木工程学院,厦门362021

出　　处：《科学技术与工程》2013年第14期4094-4098,共5页Science Technology and Engineering

基　　金：国家自然科学基金项目(51178143)资助

摘　　要：实验研究表明加速度振动信号强度和板边约束有很大关系,约束越强加速度幅值越小。当裂缝产生及板与钢梁的发生相对错动时,加速度信号会发生突变。整个升温阶段振动信号大致分为三个阶段,前期和后期信号比较平稳,中期阶段振动信号比较强烈,且伴随有较多的信号突变。梁柱部位的振动信号相对较弱。完全可以通过振动信号监测混凝土板裂缝的开展情况。Test dates showed that vibration acceleration the constraints were stronger the acceleration amphtude was and steel beams occurred the acceleration signals signal was related with the boundary constraints. When larger. When cracks and dislocation between RC slabs were strengthened suddenly. Vibration process could be divided into three stages concluding early stage, medium stage and late stage throughout the whole heating stage. Moreover acceleration signals were stable during the early and medium stages but they were strong during the medium stage and lots of sudden change of signals occurred. And vibration of the beams and central column was relatively weak. Through the analysis of the vibration signals the cracks development could be monitored.

关 键 词：连续混凝土板 振动 裂缝 边界约束 

分 类 号：TU375.2[建筑科学—结构工程]