素混凝土托换柱承载力试验研究  

Study on bearing capacity test on plain concrete underpinned column

作　　者：毕重[1] 王清湘[2] 何秀斌[1] 

机构地区：[1]辽宁工学院土木系,辽宁锦州121001 [2]大连理工大学土木水利学院,辽宁大连116024

出　　处：《辽宁工程技术大学学报（自然科学版）》2005年第5期692-694,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅基金资助项目(200320085)

摘　　要：通过3组新老素混凝土托换柱模型试验,测得模型表面混凝土的剪应变变化规律、开裂载荷、破坏载荷。研究了龄期、界面剂对托换柱承载力的影响,素混凝土托换柱的破坏机理、破环形态。试验表明,界面剂可以提高托换柱承载力5%左右,托换柱底部应力较大,底部是薄弱环节,施工中应加强底部拉结。同时建立了素混凝土托换柱承载力计算公式,与实验结果吻合较好。Through the model test on three groups of new and old plain concrete underpinned columns, the shear strain translation rule of the concrete surface, the crack load and the failure load were measured. The age and the painting of the interface influence on the underpinned column＇s bearing capacity were studied. At the same time, the reason for destruction, the failure mode and the bearing capacity were analyzed. The findings indicate that the painting of the interface can reinforce about 5% of the underpinned column＇s bearing, the bottom stress of the underpinned column is large and the bottom is a weak section, so it should be strengthened in the construction. The formula of the bearing capacity of the plain concrete underpinned column was established; it fits the experiment results.

关 键 词：素混凝土 托换柱 承载力 破坏形态 

分 类 号：TU431[建筑科学—岩土工程]