【作者】 布占宇； 陈剑； 郑荣跃；

【Author】 BU Zhan-Yu~1,CHEN Jian~2,ZHENG Rong-Yue~1 (1 Faculty of Architecture,Civil Engineering and Environment,Ningbo University,Zhejiang Ningbo 315211,China; 2 Architectural Design and Research Institute of Ningbo University,Zhejiang Ningbo 315211,China)

【机构】 宁波大学建筑工程与环境学院； 宁波大学建筑设计研究院；

【摘要】 带耗能钢筋后张无粘结预应力节段拼装桥墩是最近出现的一种新的节段拼装桥墩结构体系,具有最大位移和残余位移可控等特点。借鉴已有矩形空心截面节段拼装混凝土桥墩模型试验的结果,利用纤维单元模型计算程序对试验过程进行了模拟,验证了模拟的正确性,然后对预应力度、恒载轴压比、预应力筋配筋率、普通钢筋配筋率等的影响进行了参数分析。最后进行了历史地震波记录作用下的地震时程响应计算分析,为节段拼装桥墩的抗震设计和抗震分析提供了参考和依据。更多还原

【Abstract】 Posttension unbonded prestressing segmental bridge columns with energy dissipation bars are new structural systems appeared in recent years,which has advantage in controlling the maximum displacement and residual displacement.With the posttension prestressing segmental bridge column test results available,the test procedure was simulated utilizing the fiber element model.The comparison between test and calculation results verified the validity of the calculation method.Then parameter analysis is carried out to study the influence of prestressing level,dead load axial compression ratio,prestressing tendon ratio and reinforcement bar ratio upon the cyclic load test results.At last the time history response of segmental bridge columns under the excitation of earthquake records are calculated and compared.The results provide references and basis for seismic resistant design and earthquake analysis of segmental bridge columns.更多还原