砖混教学楼横墙不同构造条件下破坏特点分析
|
摘要
通过5片缩尺横墙试件的拟静力试验对两端设置构造柱的普通横墙试件和墙中增设附加构造的组合墙体试件的破坏形态、滞回性能、抗倒塌性能以及附加构造的作用机理等进行了分析。结果表明,横墙的破坏模式、耗能性能与构造情况有关,附加构造柱的存在改变了墙体的破坏模式,大幅提高墙体的抗剪承载力,但同时会降低墙体的延性耗能能力,当在墙体中增设构造柱和圈梁时,附加圈梁的拉结作用能够进一步提高墙体的主拉应力抗剪强度,显著改善严重破坏、严重变形条件下的整体性,使得墙体表面裂缝分散,主裂缝宽度减小,因此对于增强墙体的抗地震倒塌能力是有利的。研究结论可为新建砖混教学楼的抗特大地震倒塌设计提供试验依据。
Quasi-static tests of five scaled transverse wall specimens with different structural measures were conducted.The damage modes,hysteresis behavior,anti-collapse performance and the mechanism and behavior of additional structural measures were analyzed.The results indicate that the damage characteristic and energy dissipation capacity of transverse wall specimens are largely dependent on the structural measures adopted.Additional structural column changes the damage mode and improves the bearing capacity of specimens,while decreases the energy dissipation capacity.The presence of additional structural column and ring beam,especially the tensile effect of additional ring beam enhances the integrity of walls under severely damaged conditions,improves the principal tensile stress shear strength and ensures better distribution of cracks,which is of crucial importance to the anti-collapse capacity of wall members.Some references can be provided for the anti-collapse design of new brick concrete teaching buildings under rare earthquake.
Quasi-static tests of five scaled transverse wall specimens with different structural measures were conducted.The damage modes,hysteresis behavior,anti-collapse performance and the mechanism and behavior of additional structural measures were analyzed.The results indicate that the damage characteristic and energy dissipation capacity of transverse wall specimens are largely dependent on the structural measures adopted.Additional structural column changes the damage mode and improves the bearing capacity of specimens,while decreases the energy dissipation capacity.The presence of additional structural column and ring beam,especially the tensile effect of additional ring beam enhances the integrity of walls under severely damaged conditions,improves the principal tensile stress shear strength and ensures better distribution of cracks,which is of crucial importance to the anti-collapse capacity of wall members.Some references can be provided for the anti-collapse design of new brick concrete teaching buildings under rare earthquake.
引文
[1]李乔,赵世春.汶川大地震工程震害分析[M].成都:西南交通大学出版社,2008.
[2]清华大学,西南交通大学.汶川地震建筑震害分析及设计对策[M].北京:中国建筑工业出版社,2009.
[3]王天贤,刘伯权.带多构造柱砖墙的变形性能分析研究[J].西安建筑科技大学学报,1996,28(2):232-236.
[4]梁建国,张望喜,郑勇强.钢筋混凝土-砖砌体组合墙抗震性能[J].建筑结构学报,2003,24(3):61-69.
[2]清华大学,西南交通大学.汶川地震建筑震害分析及设计对策[M].北京:中国建筑工业出版社,2009.
[3]王天贤,刘伯权.带多构造柱砖墙的变形性能分析研究[J].西安建筑科技大学学报,1996,28(2):232-236.
[4]梁建国,张望喜,郑勇强.钢筋混凝土-砖砌体组合墙抗震性能[J].建筑结构学报,2003,24(3):61-69.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心