预应力筋粘结形式对框架复位性能的影响  

Influence by Bonding Styles of Prestressed Strands/Steels on Re-centering Behavior of PC Frames

作　　者：汪训流[1] 叶列平[2] 陆新征[2] 

机构地区：[1]中国电子工程设计院结构评估及加固所,北京100840 [2]清华大学土木工程系,北京100084

出　　处：《建筑结构》2008年第8期57-60,共4页Building Structure

基　　金：高等学校博士学科点专项科研基金资助课题(编号20040003095)

摘　　要：残余变形是衡量结构震后能否继续满足使用要求和可修复性的重要指标。首先提出以残余变形为目标的结构或构件复位性能的基本概念;然后利用已开发并经试验验证的纤维模型程序,完成了一榀预应力混凝土框架试件在不同预应力筋粘结形式下的数值模拟,初步探讨了预应力筋粘结形式对结构复位性能的影响。计算结果表明,对于按规范设计的预应力混凝土框架,框架柱预应力筋粘结形式对框架的复位性能产生较大影响,而框架梁预应力筋的影响则相对较小。实际工程中预应力筋宜优先采用部分无粘结形式。Residual deformation is a key index to assess whether a structure can be reused or restored after an earthquake. A PC frame has been simulated with various bonding styles of PS by a fiber model program developed and validated with test data in this study, and some simple discussions to the effect on re-centering behavior of PS bonding styles have been given. The results of simulation indicate that, as to PC frames designed according to codes in existence, the bonding style of PS used in columns has great influence on the re-centering behavior of PC frame, while the PS of beams have relatively little effect. It should take priority to use the partially debonding style of PS in the engineering practice.

关 键 词：预应力混凝土 框架结构 纤维模型 粘结形式 复位性能 部分无粘结 

分 类 号：TU378.4[建筑科学—结构工程] TU378