预应力装配式联肢墙计算理论及抗震性能分析.pdfVIP

第七届全国土木工程研究生学术论坛 东南大学 2009 预应力装配式联肢墙计算理论及抗震性能分析* 蔡小宁 1 孟少平 1 孙巍巍 2 吴京 1 （1.东南大学混凝土及预应力混凝土教育部结构重点实验室 2.南京理工大学土木系） 摘 要： 本文针对两种新型的无粘结预应力装配式联肢墙－直接装配式联肢墙和混合装配式联肢墙，推导两种联肢墙的肢强系 数ζ 和整体性系数α ，进而推导结构在多遇地震下的侧移及内力，为结构的设计提供计算理论。采用有限元软件 DRAIN-2DX 并编制相应的程序验证分析的正确。研究预应力装配式联肢墙的肢强系数ζ 和整体性系数α 、普通钢筋与预应力筋的布置及普 通钢筋与预应力筋的面积比对结构抗震性能的影响。进行两榀预应力装配式联肢墙的试验研究，分别是混合装配式和直接装配 式，试验结果证实了本文理论及预制装配式联肢墙设计理念的的正确性。研究结果表明：结构的弹性刚度仅与水平荷载分布形式 及自身尺寸特性相关， 、 、预应力及普通钢筋的无粘结长度对结构的延性及承载力有影响，要合理选择参数，使结构获得更 ζ α 好的延性和承载力；预应力筋与普通钢筋面积比应在合理的范围内，使结构具有自恢复能力。 关键词： 预应力；装配；联肢墙；抗震性能 Calculation Theory and Analysis on Seismic Behavior of Post-tensioned Precast Coupled Wall Cai Xiaoning1 ,Meng Shaoping1, Sun Weiwei2 [1] Key laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096; 2. Nanjing University of Science and Technology, Nanjing 210094) [Abstract]: In this paper ,two kinds of new unbonded post-tensioned precast coupled wall were studied—the direct precast coupled wall and the hybrid reinforced precast coupled wall.The limb strength coefficient ζ and integrative αwere derived and further the formula calculating the displacement and internal force of structure under frequently occurred earthquake.The finite element DRAIN-2DX and a computer code developed were used to justify the accuracy of the proposed formula. Effects of ζ , α, the arrangement of bar reinforcement and unbonded post-tensioned reinforcement and ratio of area of bar reinforcement to unbonded post-tensioned reinforcement on seismic behavior of hybrid reinforced precast coupled wall were studied.Two specimens of unbonded post-tensioned precast coupled wall were tested, one was the direct pre