摘要
针对地震作用下混凝土结构塑性铰区域动态应力的监测需求,提出利用压电智能骨料进行混凝土内部损伤过程动态应力监测的方法,采用试验手段对该方法进行验证:对1根在塑性铰区域布置压电智能骨料及应变片的混凝土柱施加水平方向动态往复荷载,得到混凝土应力及钢筋的应变时程并进行对比分析。结果表明:压电智能骨料可以监测混凝土开裂的过程,测得混凝土抗拉强度与理论值基本一致;压电智能骨料可以监测动态加载全过程的钢筋混凝土内部压应力重分布规律,并与钢筋应变片的应变变化规律相互印证,验证了该监测方法的可行性。
According to the demand for seismic stress monitoring of plastic hinge zone in RC structure under earthquake, a method for concrete damage stress monitoring based on smart aggregate （SA for abbreviation） was proposed. Experiment was carried out to verify this method. The lateral cyclic loading was applied to a RC column with smart aggregate and strain gauge embedded in the plastic hinge zone, and contrastive analysis was conducted using the stress of concrete and strain of steel bar monitored by SA and strain gauge, respectively. The test results showed that the SA could monitor the process of the concrete cracking and the measured tensile strength agreed basically with theoretical value. The SA could also monitor the variation of the reinforced concrete compressive stress, whose reliability could be confirmed by the variation of the strain of the steel bar. It can be concluded that the proposed seismic stress monitoring method for RC structure is feasible.
出处
《工业建筑》
CSCD
北大核心
2016年第8期85-88,97,共5页
Industrial Construction
基金
国家自然科学基金项目(91315301-09/12
51261120376)
