摘要
震害和分析证明,填充墙的刚度效应能够较大地增加结构的层间侧移刚度,填充墙和框架梁的组合 抗弯刚度要远大于原有框架梁的抗弯刚度。在可能存在薄弱层、扭转破坏以及强梁弱柱情况时,规范应明确 考虑填充墙的刚度效应,并把薄弱层附近的上下层侧移刚度比控制在1.3～2之间。规范没有考虑填充墙的约 束效应可能使短肢剪力墙变为矮墙,框架梁变为短梁,针对这两种情况带来的不安全性,建议规范补充改进措 施。地震作用下填充墙有可能产生平面外破坏,建议规范对填充墙的高厚比进行限值,并适当提高对填充墙 中块体和砂浆的强度要求。
The stiffness effect of masonry infilling adds the story lateral stiffness.The flexual stiffness of masonry infilling-beam is larger than that of frame beam.Analyses and earthquake hazard show that the stiffness effect must be calculated in code in case of the instances such as soft story, torsion failure and weak-column-strong-beam structure, and the stiffness ratio must be controlled between 1 3 and 2. Columns, walls and beams become short ones for the restriction effects of masonry infilling.The influences of short walls and short beams on structure are proposed to account in code.It is suggested to limit the height thickness ratio and increase the strengths of block and mortar properly in code to avoid the out-of-plain failure of the infilling.
出处
《建筑结构》
CSCD
北大核心
2005年第3期57-60,65,共5页
Building Structure
