摘要
对3片1∶1衬砌管片进行了承载力试验,分析了试验加载方式和配筋率对钢筋混凝土衬砌管片破坏机理、极限荷载的影响。试验结果表明,轴力作用可以有效提高衬砌管片的开裂荷载、屈服荷载和极限荷载;衬砌管片屈服荷载和极限荷载随配筋率的提高而提高,但提高幅度不大,而配筋率的提高对开裂荷载基本无影响。根据衬砌管片偏心受压破坏模式,给出了衬砌管片偏心受压承载力实用计算公式。
A test of three reinforced concrete（RC） lining segments of full-scale was carried out.The effect of the loading method and reinforcement ratio on the failure mechanism and ultimate bearing capacity of the RC lining segments was analyzed based on the test results.Test results indicated that the cracking load,the yielding load and the ultimate load obviously increases because of the axial force effect.The yielding load and the ultimate load slightly increase with an increase of the reinforcement ratio,but the cracking load was hardly affected by the reinforcement ratio.Based on the analysis of the failure mode of lining segment,formulas for the bearing capacity of the lining segment to eccentric compression are proposed.
出处
《山东大学学报（工学版）》
CAS
北大核心
2010年第4期84-87,共4页
Journal of Shandong University（Engineering Science）
基金
沈阳市科技局
财政局资助项目(2007GX-47)
关键词
盾构隧道
衬砌管片
承载力
shield tunneling
lining segment
bearing capacity
