EXPERIMENTAL AND NUMERICAL ANALYSIS OF EARLY-AGE STRESS IN CONCRETE DIAPHRAGM WALL OF UNDERGROUND STRUCTURES

摘要：

For massive concrete structures,cracking due to early-age shrinkages can be very detrimental to their long term durability.In the paper,the early-age stress in a concrete diaphragm wall of an underground structure is studied experimentally and numerically through laboratory tests and full Scale analysis.The basic mechanical properties,autogenous shrinkage and early-age stress of structural concrete are investigated in laboratory.On the basis of constraint test by temperature stress test machine(TSTM),the tensile creep behavior of early-age concrete is studied.With a constructed numerical algorithm the corresponding tensile creep law is identified and the difference of tensile and compressive creep laws is discussed.The identified creep law is then applied to the thermoviscoelastic analysis of early stress in full-scale diaphragm wall structure to predict the tensile stress evolution.Based on the available results,the optimal design option is discussed.

关键词： concrete early-age shrinkage tensile creep diaphragm wall model test

作者: Kefei LI Yuwen JU Jianguo HAN Chunsheng ZHOU

作者单位: Key Laboratory of Structural Engineering and Vibration of China Education Ministry,Civil Engineering Department,Tsinghua University,Beijing,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 1173-1179

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）