Detection and Cause Analysis of Internal Cracks for Large Scale 2-Directional Pre-Stressed Concrete Walls

Journal of Shanghai Jiaotong University ›› 2015, Vol. 49 ›› Issue (07): 977-982.

• Architechural Science • Previous Articles Next Articles

Detection and Cause Analysis of Internal Cracks for Large Scale 2-Directional Pre-Stressed Concrete Walls

FENG Shaokong1,HUANG Tao2,LI Haifeng2

(1. School of Naval Architectural, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

Received:2014-08-30 Online:2015-07-30 Published:2015-07-30

Abstract

Abstract:

Abstract： Splitting cracks were found in the two-directional pre-stressed concrete walls of a large scale diversion project in north China. Based on internal structural characteristics of the wall, the impact imaging method (IIM) was applied for the detections of cracks distribution, seriousness and damage area ratio of the internal cracks and the damage cause analysis. The core test and numerical simulation by 3D FEM with prefabricated joints element were also adopted for verifications. The 56 drilled cores show that the IIM has high accuracy and resolutions on the internal crack distributions. This result provides reliable data for decisionsmaking of the wall repair strategies. Both field test results and numerical analysis show that the frost of the water inside the corrugated pipes that contain the prestressed tendon lead to the internal splitting cracks, due to the incompact grouting into the pipes. This accident shows the significance of the grouting quality control of the corrugated pipes inside the posttensioned structures in cold regions in northern China.
Key words：

Key words: vertical wall of large scale pre-stressed concrete structure, crack detection, crack mechanism, impact imaging method

CLC Number:

TU 435

FENG Shaokong1,HUANG Tao2,LI Haifeng2. Detection and Cause Analysis of Internal Cracks for Large Scale 2-Directional Pre-Stressed Concrete Walls[J]. Journal of Shanghai Jiaotong University, 2015, 49(07): 977-982.

References

［1］SL3262005，水利水电工程物探规程［S］.

［2］车爱兰，黄醒春，郭强,等.利用面波法勘探检测沉管隧道压浆法的充填效果［J］.上海交通大学学报，2011，45（5）：648652.

CHE Ailan，HUANG Xinchun，GUO Qiang, et al. Evaluation of mudjack method filling effect of immersed tube tunnel using surface wave survey method［J］. Journal of Shanghai Jiaotong University, 2011,45(5):648652.

［3］万里，韩晓健，汪博,等.冲击回波法识别混凝土缺陷实验研究［J］.混凝土，2012(2)：810.

WAN Li, HAN Xiaojian, WANG Bo, et al. Experiment study on the impactecho test for the flaw detection of concrete structure［J］.Concrete,2012(2):810.

［4］邓中俊，姚成林，贾永梅,等.探地雷达在水工隧洞质量检测中的应用［J］.水利水电技术，2008,39（10）：108112.

DENG Zhongjun, YAO Chenglin, JIA Yongmei, et al. Application of ground penetrating radar to quality detection of hydraulic tunnel［J］.Water Resources and Hydropower Engineering,2008,39(10):108112.

［5］LIU Chao, CHE Ailan, FENG Shaokong. Propagation characteristics of elastic wave in layered medium and applications of impact imaging method ［J］. Journal of Shanghai Jiaotong Univ (Sci), 2013, 18（4）:479485.

［6］朱伯芳.有限单元法原理及应用［M］.北京：中国水利水电出版社,1998.

［7］ZHANG Guoxin, LIU Yi, ZHENG Cuiying, et al. Simulation of influence of multidefects on longterm working performance of high arch dam［J］. Science China Technological Sciences, 2011, 54(Sup.1):18.

［8］张国新. SAPTIS: 结构多场仿真与非线性分析软件开发及应用 (之一)［J］.水利水电技术，2013, 44(1): 3137.

ZHANG Guoxin. Development and application of SAPTIS—A software of multifield simulation and nonlinear analysis of complex structures(Part I)［J］.Water Resources and Hydropower Engineering, 2013, 44(1):3137.

[1]	LIU Chao (刘超), CHE Ai-lan* (车爱兰), FENG Shao-kong (冯少孔). Propagation Characteristics of Elastic Wave in Layered Medium and Applications of Impact Imaging Method [J]. Journal of shanghai Jiaotong University (Science), 2013, 18(4): 479-485.
[2]	CHANG Dong1,2,ZUO Xianzhang1,TIAN Guiyun3,QIAN Sumin1. Analysis of the Crack Orientation Effect on Pulsed Eddy Current Stimulated Thermography [J]. Journal of Shanghai Jiaotong University, 2013, 47(05): 779-785.

Detection and Cause Analysis of Internal Cracks for Large Scale 2-Directional Pre-Stressed Concrete Walls

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 2

Recommended Articles

Metrics

Comments