Simulation of Concrete‐Frame Collapse due to Dynamic Loading

Hakuno, Motohiko; Meguro, Kimiro

doi:10.1061/(asce)0733-9399(1993)119:9(1709)

Cited by 44 publications

(15 citation statements)

References 3 publications

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“…The former cannot describe whole process of structural collapse, and for the latter, test models designed according to building codes are difficult to collapse in the laboratory due to the limited capacity of shaking table. With the development of computer simulation technology, constitutive models and failure criteria of structural materials, and numerical methods, such as explicit finite element, discrete element, etc., it is possible to obtain the whole process of structural collapse by numerical simulation analysis and some progress having been made so far [4][5][6][7][8][9]. In this paper, a simulation program based on discrete element method and segment-multi-spring model is developed to simulate the response of RC frame structures including collapse process under earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and analysis for collapse responses of RC frame structures under earthquake

Zhang

Lü

Yin

2009

Front. Archit. Civ. Eng. China

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In this paper, a discrete element model for collapse simulation of RC frame structure is constructed by discretizing the structure into a few elements and spring groups. This model introduces special hysteretic models of connected springs for arbitrary loading path and also takes into account reasonable failure criteria for springs considering coupling effect of shear and axial force. Based on the discrete element model, a computer program is developed to simulate the whole process of RC frame structures from initial state to collapse under earthquakes. Particularly, the contact-impact problem between discrete elements has been treated with effective measures. Then, the program is employed to study the collapse mechanism of a real building in Wenchuan earthquake-hit area; the result of which shows that the simulation program developed based on the new model can realistically simulate the seismic collapse process of RC frame structures.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation and analysis for collapse responses of RC frame structures under earthquake

Zhang

Lü

Yin

2009

Front. Archit. Civ. Eng. China

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“…[13][14][15]), discrete element methods (DEM) (e.g. [16][17][18]) and hybrid approaches such as the combined FEM-DEM (e.g. Munjiza [19]).…”

Section: Introductionmentioning

confidence: 99%

Progressive collapse analysis through strength degradation and fracture in the Mixed Lagrangian Formulation

Lavan

Sivaselvan

Reinhorn

et al. 2009

Earthq Engng Struct Dyn

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SUMMARYThe dynamic analysis of progressive collapse faces a great number of obstacles that often lead to the collapse of the analysis prior to the actual analysis of collapse. Hence, the Mixed Lagrangian Formulation that has been shown to be very robust was adopted as a framework to accommodate such analysis. By modifying the loading function and the numerical scheme, the capabilities of this framework were extended to account for strength degradation and fracture, while some insight to its behavior is introduced as well. The examples presented show a very robust and stable behavior of the numerical scheme in terms of the time step size required, even in cases where a sudden fracture takes place.

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“…This feature enables it to be used for structure collapse analysis. An extended distinct element method (EDEM) improved by Hakuno and Meguro [8][9][10] introduced pore springs between rigid bodies to deal with continuous media such as reinforced concrete materials. As the springs yield and fail, the structure changes gradually from elastic to plastic and ÿnally to discontinuous media so that all elasto-plastic phenomena including collapse can be simulated.…”

Section: Introductionmentioning

confidence: 99%

Application of extended distinct element method with lattice model to collapse analysis of RC bridges

Sun

Zhou

Dong

et al. 2003

Earthq Engng Struct Dyn

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SUMMARYThis paper proposes a simple lattice model for collapse analysis of RC bridges subjected to earthquakes by using the extended distinct element method (EDEM). In the model, a concrete element consists of lumped masses connected to one another by springs, and a reinforcement bar is represented by a discrete model or an integrated model. The proposed lattice model is simple but its parameters are reasonably deÿned. It has fewer element nodes and connecting springs, which will be of beneÿt by shortening the CPU time. The processes to determine the initial sti ness of concrete and steel springs, the parameters of the constitutive model and the fracture criteria for springs are described. A re-contact spring model is also proposed to simulate the re-contact of the concrete after fracture of springs; and a general grid searching method is used to decrease the CPU time for judging re-contact after fracture. The lattice model is assessed by numerical simulations and experiments. As an application, a damaged single-column pier subjected to the Kobe Earthquake in 1995 is analysed by EDEM with the proposed model. The simulation results indicate that the proposed model predicts well qualitatively the collapse process of RC bridges.

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Simulation of Concrete‐Frame Collapse due to Dynamic Loading

Cited by 44 publications

References 3 publications

Numerical simulation and analysis for collapse responses of RC frame structures under earthquake

Numerical simulation and analysis for collapse responses of RC frame structures under earthquake

Progressive collapse analysis through strength degradation and fracture in the Mixed Lagrangian Formulation

Application of extended distinct element method with lattice model to collapse analysis of RC bridges

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