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A platform for research: civil engineering, architecture and urbanism
Seismic performance of joints of prefabricated corrugated steel utility tunnels Part(I)–Experimental analysis
Abstract This paper presents the seismic performance of a corrugated steel plate utility tunnel, based on an engineering prototype. The research combines quasi-static testing and numerical simulation to investigate the behavior of the structure under cyclic loads in different directions. Specifically, six loading scenarios were considered: the quasi-static test was conducted for transverse tension and compression, transverse bending and shear, vertical shear test (Conditions (1–3)), while numerical simulations were performed for longitudinal tension and compression, transverse shear, and vertical bending shear test (Condition (4–6)) in Part(II). The results reveal comprehensive hysteresis curves for the plate under diverse loading directions, with an extended yield platform section that underscores its significant plastic deformation capacity. However, the “pinch” phenomenon of the hysteresis curve is obvious. The existence of rounded corners not only makes the hysteresis curve of the plate asymmetrical but also makes a great difference to the bearing capacity of the structure in the direction of positive and negative loading. The component exhibits superior bearing capacity and stiffness along the longitudinal direction compared to other orientations. Additionally, the structure demonstrates remarkable energy dissipation capabilities because of the inherent “accordion effect” of the corrugated steel plate. Moreover, the maximum energy dissipation coefficient in three directions is more than 1.0, illustrating its excellent energy dissipation capacity. The results provided valuable insight into the seismic performance of joints and contributed to the safe design of prefabricated corrugated steel utility tunnels.
Graphical abstract In this paper, configurations of six loading scenarios for the Prefabricated Corrugated Steel Utility Tunnel (PCSUT) were proposed to study its seismic performance. Moreover, three cyclic loading scenarios were conducted to examine the effects on the seismic behavior of PCSUT and to analyze the joint failure mechanism. First, the details of the specimens and test setup were introduced, and then the failure mechanisms of the specimens were analyzed. Lastly, the hysteresis curve, skeleton curve, ductility coefficient, stiffness and strength characteristics, and energy dissipation capacity were provided in detail. For example, schematic diagrams of the six loading scenarios were designed (Fig. 1 (a) to (f)), and the test setup for the three loading scenarios was provided below (Fig. 2 (a) to (c)). The seismic behavior of the PCSUT specimens is illustrated in Fig. 3 (a) to (c). Fig. 1 The schematic diagrams of test setup. Fig. 2 The test setup for (a) Condition 1; (b) Condition 2; (c) Condition 3. Fig. 3 Hysteresis and Skeleton Curve. Display Omitted
Highlights A Quasi-Static experiment was conducted on the joint's of seismic behavior of prefabricated steel utility tunnel sections. The lower node (1/4 Model) of a full-scale utility tunnel was selected for the experiment and three cyclic loading scenarios were applied to model the effects of earthquake actions. The joint failure mechanism and a systematic analysis were conducted on key factors under low cycle cyclic loading.
Seismic performance of joints of prefabricated corrugated steel utility tunnels Part(I)–Experimental analysis
Abstract This paper presents the seismic performance of a corrugated steel plate utility tunnel, based on an engineering prototype. The research combines quasi-static testing and numerical simulation to investigate the behavior of the structure under cyclic loads in different directions. Specifically, six loading scenarios were considered: the quasi-static test was conducted for transverse tension and compression, transverse bending and shear, vertical shear test (Conditions (1–3)), while numerical simulations were performed for longitudinal tension and compression, transverse shear, and vertical bending shear test (Condition (4–6)) in Part(II). The results reveal comprehensive hysteresis curves for the plate under diverse loading directions, with an extended yield platform section that underscores its significant plastic deformation capacity. However, the “pinch” phenomenon of the hysteresis curve is obvious. The existence of rounded corners not only makes the hysteresis curve of the plate asymmetrical but also makes a great difference to the bearing capacity of the structure in the direction of positive and negative loading. The component exhibits superior bearing capacity and stiffness along the longitudinal direction compared to other orientations. Additionally, the structure demonstrates remarkable energy dissipation capabilities because of the inherent “accordion effect” of the corrugated steel plate. Moreover, the maximum energy dissipation coefficient in three directions is more than 1.0, illustrating its excellent energy dissipation capacity. The results provided valuable insight into the seismic performance of joints and contributed to the safe design of prefabricated corrugated steel utility tunnels.
Graphical abstract In this paper, configurations of six loading scenarios for the Prefabricated Corrugated Steel Utility Tunnel (PCSUT) were proposed to study its seismic performance. Moreover, three cyclic loading scenarios were conducted to examine the effects on the seismic behavior of PCSUT and to analyze the joint failure mechanism. First, the details of the specimens and test setup were introduced, and then the failure mechanisms of the specimens were analyzed. Lastly, the hysteresis curve, skeleton curve, ductility coefficient, stiffness and strength characteristics, and energy dissipation capacity were provided in detail. For example, schematic diagrams of the six loading scenarios were designed (Fig. 1 (a) to (f)), and the test setup for the three loading scenarios was provided below (Fig. 2 (a) to (c)). The seismic behavior of the PCSUT specimens is illustrated in Fig. 3 (a) to (c). Fig. 1 The schematic diagrams of test setup. Fig. 2 The test setup for (a) Condition 1; (b) Condition 2; (c) Condition 3. Fig. 3 Hysteresis and Skeleton Curve. Display Omitted
Highlights A Quasi-Static experiment was conducted on the joint's of seismic behavior of prefabricated steel utility tunnel sections. The lower node (1/4 Model) of a full-scale utility tunnel was selected for the experiment and three cyclic loading scenarios were applied to model the effects of earthquake actions. The joint failure mechanism and a systematic analysis were conducted on key factors under low cycle cyclic loading.
Seismic performance of joints of prefabricated corrugated steel utility tunnels Part(I)–Experimental analysis
Yue, Feng (author) / Liao, Kai (author) / Min, Aung Khaing (author) / Xiong, Shigen (author) / Liu, Bowen (author) / Jiang, Xiaoli (author) / Bao, Xiaohua (author) / Fu, Miao (author)
2024-03-12
Article (Journal)
Electronic Resource
English