岩土力学2011，Vol.32Issue(2)：459-464,6.
高烟囱爆破拆除倾倒折断力学分析
Analysis of fracture mechanics for falling tall chimneys during demolition blasting
摘要
Abstract
In order to explain the frequent phenomenon that tall chimneys with a height more than 150m always fracture during falling process during demolition blasting, a mechanical model of tall reinforced concrete chimneys is set up in the directional falling process through the appropriate structural design parameters selected in accordance with the design standard of chimneys.The inner force distribution and limit bearing capacity expressions of chimney section at any time are derived; and the failure mechanism is analyzed.And then the evaluation is carried out if chimneys will fracture or not during demolition blasting according to its load and section strength.Results show that tall chimneys with a height more than 150 m will fracture at the section to the top 1/3 height when the tilting angle reaches to 40° -60° during demolition blasting.关键词
高耸烟囱/爆破拆除/定向倾倒/承载力/折断分类
建筑与水利引用本文复制引用
杨建华,马玉岩,卢文波,孙金山,陈明..高烟囱爆破拆除倾倒折断力学分析[J].岩土力学,2011,32(2):459-464,6.基金项目
"十一五"国家科技支撑计划项目(No.2008BAB29B01) （No.2008BAB29B01）
教育部新世纪优秀人才支持计划(No.NCET-06-0616) （No.NCET-06-0616）
湖北省自然科学基金杰出青年人才项目(No.2007ABB026). （No.2007ABB026）
