东南大学学报（自然科学版）Issue(5)：944-951,8.DOI:10.3969/j.issn.1001-0505.2013.05.008
粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅰ：双向拟静力试验
Anti-seismic properties of damaged concrete bridge piers with hollow box-section strengthened with adhering steel plates Ⅰ:bi-directional quasi-static test
摘要
Abstract
11 scaled models of reinforced concrete bridge piers with hollow box-section were de-signed and fabricated in the lab.Bi-directional quasi-static tests for these scaled pier models strength-ened with adhering steel plates were carried out.Several seismic performance indicators, such as load-displacement hysteretic and skeleton curves, ductility, degradation of rigidity, and energy dissi-pation were investigated.The experimental results show that all the strengthened piers present typical flexural failure modes, and plastic hinge appears in the superior margin of steel plates in stead of in the bottom for piers without strengthening.The improvement of anti-seismic properties exhibits that it was an effective method to change the plastic hinge position by adhering steel plates.The load ca-pacity and the lateral rigid along the strong axis direction are greater, while the energy dissipation a-long the weak axis direction is stronger.The hysteretic curves of the weak axis exhibit notable pinch effects.The initial damage only has small effect on the degradation of rigidity and energy dissipation of the strengthening piers.Meanwhile, the changes of axial compression ratio and slenderness ratio have a great impact on the seismic performance.With the increase of the axial compression ratio, the carrying capacity, the ductility performance and energy dissipation of models increase, but the ulti-mate displacement decreases.With the decrease of the slenderness ratio, the carrying capacity of piers strengthened with adhering steel plates increases;however the ultimate deformation capacity de-creases, while the degradation of rigidity becomes more serious.关键词
钢筋混凝土箱型桥墩/粘钢加固/双向拟静力试验/抗震性能/初始损伤Key words
reinforced concrete bridge piers with hollow box-section/strengthening with adhering steel plates/bi-directional quasi-static test/anti-seismic properties/initial damage分类
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宗周红,邓江东,黎雅乐,刘爱荣..粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅰ：双向拟静力试验[J].东南大学学报（自然科学版）,2013,(5):944-951,8.基金项目
“十二五”国家科技支撑计划资助项目（2011BAK02B03）、教育部博士点基金资助项目（20110092110011）、国家自然科学基金资助项目（51308137）、广东省科技计划资助项目（2012B040302005）、广州市科技计划重大专项资助项目（2011Y2-00006）、广州市属高校科研资助项目（10A005）． （）
