Analysis of the Structural Response of a Mid-span Multi-girder Composite Bridge submitted to different Fire Scenarios

2014 ◽  
Vol 102 (43) ◽  
pp. 71-78
Author(s):  
José Alós Moya ◽  
Ignacio Payá Zaforteza ◽  
Antonio Hospitaler Pérez ◽  
José Aguado López
Keyword(s):  
Structural Response ◽  
Fire Scenarios ◽  
Composite Bridge

scholarly journals Analysis of concrete-filled stainless steel tubular columns under combined fire and loading

2018 ◽  
Author(s):  
Qinghua Tan ◽  
Leroy Gardner ◽  
Linhai Han ◽  
Dianyi Song
Keyword(s):  
Stainless Steel ◽  
Fire History ◽  
Failure Modes ◽  
Structural Response ◽  
Fe Model ◽  
Axial Deformation ◽  
Tubular Columns ◽  
Deformation Curves ◽  
Heating And Cooling ◽  
Fire Scenarios

In fire scenarios, concrete-filled stainless steel tubular (CFSST) columns undergo initial loading at ambient temperature, loading during the heating phase as the fire develops, loading during the cooling phase as the fire dies out and continual loading after the fire. CFSST columns may fail some points during this process under combined fire and loading. In this paper, the failure modes and corresponding working mechanism of CFSST columns subjected to an entire loading and fire history are investigated. Sequentially coupled thermal-stress analyses in ABAQUS are employed to establish the temperature field and structural response of the CFSST column. To improve the precision of the finite element (FE) model, the influence of moisture on the thermal conductivity and specific heat of concrete during both the heating and cooling phases is considered using subroutines. Existing fire and post-fire test data of CFSST columns are used to validate the FE models. Comparisons between predicted and test results confirm that the accuracy of the FE models is acceptable; the FE models are then extended to simulate a typical CFSST column subjected to the entire loading and fire history. The behaviour of the CFSST column is explained by analysis of the temperature distribution, load versus axial deformation curves and failure response.

Review of Tunnel Fire Damage Assessment Methods and Techniques

2021 ◽  
pp. 036119812098722
Author(s):  
Nan Hua ◽  
Negar Elhami-Khorasani ◽  
Anthony Tessari
Keyword(s):  
Numerical Models ◽  
Structural Response ◽  
Concrete Lining ◽  
Future Research ◽  
Fire Damage ◽  
Gas Temperature ◽  
Tunnel Fire ◽  
Emergency Responder ◽  
Fire Scenarios ◽  
Damage In Concrete

Major tunnel fires can have catastrophic consequences, including loss of life, property damage, and long-term service disruptions. The rapid rise of gas temperature in excess of 1,000°C (1,832°F) inside a confined tunnel space as well as long fire duration because of limited emergency responder access necessitate special design considerations when evaluating the structural response to fire. Although tunnel stability is not challenged in most cases, severe damage to the concrete lining is observed after major fire events. This paper provides a detailed review of assessment methodologies and techniques of fire damage in concrete tunnel linings, including guidance on the determination of fire scenarios, concrete spalling, and tunnel safety from existing codes and guidelines, experiments, and numerical models. Based on the review, the need to develop relevant guidelines is emphasized, the knowledge gaps in the existing research are identified, and future research directions are proposed.

scholarly journals A numerical approach for evaluating residual capacity of fire damaged concrete members

2020 ◽  
Vol 10 (2) ◽  
pp. 230-242
Author(s):  
Venkatesh Kodur ◽  
Ankit Agarawal
Keyword(s):  
Numerical Model ◽  
Mechanical Response ◽  
Structural Response ◽  
Numerical Approach ◽  
Fire Exposure ◽  
Ambient Conditions ◽  
Concrete Members ◽  
Fire Scenarios ◽  
Residual Capacity ◽  
Residual Response

This paper presents an approach to evaluate residual capacity of fire-damaged concrete structures. The approach involves capturing response in three stages; namely, structural response at ambient conditions (prior to fire exposure), thermo-mechanical response during fire exposure, and post-fire residual response after cooling down of the structural member. The proposed approach is implemented in a comprehensive numerical model developed in the finite element computer program ABAQUS for specifically evaluating residual capacity of an RC beam after exposure to different fire scenarios. Predictions from the numerical model are utilized to highlight importance of each stage of analysis in evaluating realistic residual capacity of fire damaged concrete members.

Influence of the distribution of the shear walls on the seismic response of the buildings

2020 ◽  
Vol 15 (1) ◽  
pp. 37-44
Author(s):  
El Mehdi Echebba ◽  
Hasnae Boubel ◽  
Oumnia Elmrabet ◽  
Mohamed Rougui
Keyword(s):  
Structural Analysis ◽  
Seismic Response ◽  
Natural Frequency ◽  
Structural Design ◽  
Structural Response ◽  
Shear Walls ◽  
Structural Elements ◽  
Analysis Software ◽  
Ansys Apdl ◽  
The Impact

Abstract In this paper, an evaluation was tried for the impact of structural design on structural response. Several situations are foreseen as the possibilities of changing the distribution of the structural elements (sails, columns, etc.), the width of the structure and the number of floors indicates the adapted type of bracing for a given structure by referring only to its Geometric dimensions. This was done by studying the effect of the technical design of the building on the natural frequency of the structure with the study of the influence of the distribution of the structural elements on the seismic response of the building, taking into account of the requirements of the Moroccan earthquake regulations 2000/2011 and using the ANSYS APDL and Robot Structural Analysis software.

Analysis and design of thermo-mechanical interfaces

2012 ◽  
Vol 60 (2) ◽  
pp. 205-213
Author(s):  
K. Dems ◽  
Z. Mróz
Keyword(s):  
Optimality Conditions ◽  
Mechanical Loading ◽  
Material Properties ◽  
Structural Response ◽  
External Boundary ◽  
Mechanical Loads ◽  
Internal Interface ◽  
Analysis And Design ◽  
First Order ◽  
Mechanical Nature

Abstract. An elastic structure subjected to thermal and mechanical loading with prescribed external boundary and varying internal interface is considered. The different thermal and mechanical nature of this interface is discussed, since the interface form and its properties affect strongly the structural response. The first-order sensitivities of an arbitrary thermal and mechanical behavioral functional with respect to shape and material properties of the interface are derived using the direct or adjoint approaches. Next the relevant optimality conditions are formulated. Some examples illustrate the applicability of proposed approach to control the structural response due to applied thermal and mechanical loads.

Hydroelastic effects in structural response under wave impact

2017 ◽  
Author(s):  
Liang-Yee Cheng ◽  
Rubens Augusto Amaro Junior
Keyword(s):  
Structural Response ◽  
Wave Impact
Sign in / Sign up

Export Citation Format

Share Document