摘要
高烈度地震区的大体积混凝土结构在强震作用下发生损伤破坏不可避免,针对当前结构薄弱部位普遍采用的抗震措施,基于混凝土塑性损伤模型分别研究了结构表面配筋和采用超高韧性混凝土(UHTCC)的地震动损伤破坏特征,对比了两种抗震措施下的结构顶部位移、表面损伤特征,分析了不同配筋面积和UHTCC加固面积的效果。结果表明,纤维掺量与配筋率相同的情况下,配筋和UHTCC对于结构损伤的降低程度接近,都能提高结构的抗震性能,相比而言,UHTCC对裂缝开度的限制更好。
The mass concrete gravity structures may be damaged under the action of strong earthquake.The effects of aseismic measures of reinforcement and ultra-high toughness concrete(UHTCC)adopted in the structural surface were studied based on the concrete plastic damage model.The dynamic response of displacement and damage characteristics with the aseismic measure of reinforcement and UHTCC respectively were compared.The effects of different reinforced area were analyzed.The results show that both the reinforcement and UHTCC can effectively reduce the damage degree of the structure and improve the aseismic performance of the mass concrete gravity structure.UHTCC is more effective on limiting the crack opening compared to the reinforcement.
作者
陈健云
杨广进
CHEN Jian-yun;YANG Guang-jin(Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116023,China;School of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《水道港口》
2019年第5期578-582,共5页
Journal of Waterway and Harbor
基金
国家重点研发计划(2017YFC0404900)
国家自然科学基金资助项目(51779032)
