Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Full scale tests and a progressive failure model to simulate full mechanical behavior of concrete tunnel segmental lining joints
Highlights Full-scale laboratory tests on segmental joints. Evaluation of the mechanical behaviors of segmental joints. Assessment of the joint failure characteristics. Proposal of an innovative model for progressive failure of joints.
Abstract In the context of segmental concrete linings for tunneling, segmental joints are the most vulnerable parts of the lining. Most existing segmental joint models cannot evaluate the full mechanical behavior of segmental joints from the elastic deformation to the inelastic damage and failure. However, in some actual field cases, segmental joint damage and failure can occur. In this study, full-scale tests on the segmental joint adopted by a gas transmission tunnel are presented. The segmental joint is continuously loaded until it reaches its ultimate capacity. The internal force, deflection and failure characteristics of the segmental joint during the loading process are reported and compared with those of previous studies tested with flat segments. The relationships between the internal force, deflection and damage to the segmental joint are systematically analyzed. The tests reveal that the full mechanical behavior of the segmental joints can be divided into three progressive phases with four critical points. Based on the test observations, a progressive failure model that consists of a multiple stress states is proposed to simulate the full mechanical behavior of the segmental lining joints. The proposed model is ultimately compared with the full-scale test results.
Full scale tests and a progressive failure model to simulate full mechanical behavior of concrete tunnel segmental lining joints
Highlights Full-scale laboratory tests on segmental joints. Evaluation of the mechanical behaviors of segmental joints. Assessment of the joint failure characteristics. Proposal of an innovative model for progressive failure of joints.
Abstract In the context of segmental concrete linings for tunneling, segmental joints are the most vulnerable parts of the lining. Most existing segmental joint models cannot evaluate the full mechanical behavior of segmental joints from the elastic deformation to the inelastic damage and failure. However, in some actual field cases, segmental joint damage and failure can occur. In this study, full-scale tests on the segmental joint adopted by a gas transmission tunnel are presented. The segmental joint is continuously loaded until it reaches its ultimate capacity. The internal force, deflection and failure characteristics of the segmental joint during the loading process are reported and compared with those of previous studies tested with flat segments. The relationships between the internal force, deflection and damage to the segmental joint are systematically analyzed. The tests reveal that the full mechanical behavior of the segmental joints can be divided into three progressive phases with four critical points. Based on the test observations, a progressive failure model that consists of a multiple stress states is proposed to simulate the full mechanical behavior of the segmental lining joints. The proposed model is ultimately compared with the full-scale test results.
Full scale tests and a progressive failure model to simulate full mechanical behavior of concrete tunnel segmental lining joints
Qiu, Yue (Autor:in) / Hu, Xiongyu (Autor:in) / Walton, Gabriel (Autor:in) / He, Cong (Autor:in) / He, Chuan (Autor:in) / Woody Ju, J. (Autor:in)
04.01.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Full scale tests on a segmented tunnel lining
| British Library Conference Proceedings | 2003