scholarly journals Progressive Collapse Assessment of Reinforced Concrete Frame Structure with and without Considering Actual Soil Condition

10.29007/p792 ◽  
2018 ◽  
Author(s):  
Bhavik Patel ◽  
Bharat Shah
Keyword(s):  
Reinforced Concrete ◽  
Soil Structure ◽  
Progressive Collapse ◽  
Frame Structure ◽  
Nonlinear Static Analysis ◽  
Soil Structure Interaction ◽  
Reinforced Concrete Frame ◽  
Structure Interaction ◽  
Concrete Frame ◽  
Collapse Assessment

It has been found that the forces in the members of frame structures considering soil-structureinteraction, differs than conventional method of analysis. Analysis considering soil-structure interaction is time-consuming process; hence, if the relation between two methods established, then by using conventional method, realistic results can be obtained. In the present work, effort has been made to study the impact of soil-structure interaction on the progressive collapse assessment of reinforced concrete frame structure (building). It is clear that the differential settlement of the foundation changes the load transfer system of the super structure. Differential settlement depends on the properties of the soil below foundation and the stiffness of the super structure. The objective of this study is to quantify the change in the reaction at the foundation level due to soil structure interaction. To achieve this target, the Winkler approach is used. In this model, soil below foundation is modelled as idealized springs. To study the effect of failure of load carrying elements i.e. columns on the entire structure; 15 storey moment resistant RC buildings is considered. The building is modelled and analyzed for progressive collapse using the structural analysis and design software SAP2000. Nonlinear static analysis is performed to understand the progressive collapse phenomena. The nonlinear static analysis is found to be the most efficient method for progressive collapse assessment of the reinforced concrete structure with consideration of soil effect. General Service Administration (GSA 2003) guideline is used for loading and procedure to assess the potential towards progressive collapse of structure.

The Failure Mechanism Analysis on a Reinforced Concrete Frame Structure in Beichuan County - The Heavy Disaster Areas of Wenchuan 8.0 Earthquake

2010 ◽  
Vol 452-453 ◽  
pp. 221-224
Author(s):  
Pei Lei Yan ◽  
Bai Tao Sun ◽  
Qiang Zhou
Keyword(s):  
Reinforced Concrete ◽  
Time History ◽  
Frame Structure ◽  
Nonlinear Static Analysis ◽  
Mechanism Analysis ◽  
Analysis Model ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structure ◽  
Beichuan County

On 12 May 2008, a magnitude 8.0 earthquake happened in Wenchuan, Sichuan province, China .It was the most serious earthquake in china since 1949, causing very huge casualties and engineering damages to the buildings. In the earthquake, a reinforced concrete frame structure of Beichuan Hotel in Beichuan County collapsed completely because of the unsuitable arrangement of column network, and the engineering damage was characteristic. In the paper, the properties of material nonlinearity were considered ,the nonlinear analysis model of reinforced concrete frame structure was established, the time history analysis and nonlinear static analysis were used during inelastic stage, the main cause of structural destruction was obtained, the influence of the arrangement of column network on the structure was discussed.Therefore ,the results can provide valuable reference for the seismic design of reinforced concrete frame structure.

CRACK RESISTANCE OF PRESTRESSED REINFORCED CONCRETE FRAME STRUCTURE SYSTEMS UNDER SPECIAL IMPACT

2021 ◽  
Vol 93 (1) ◽  
pp. 74-84
Author(s):  
T.A. ILIUSHCHENKO ◽  
◽  
V.I. KOLCHUNOV ◽  
S.S. FEDOROV ◽  
◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Crack Resistance ◽  
Impact Analysis ◽  
Progressive Collapse ◽  
Frame Structure ◽  
Frame Structures ◽  
Reinforced Concrete Frame ◽  
Resistance Development ◽  
Concrete Frame ◽  
Before And After

The results of experimental and theoretical researches of crack resistance, development and growth of cracks of a fragment of a reinforced concrete multi-storey frame of a monolithic building with prestressed beams for a special emergency impact caused by a sudden removal of one of the load-bearing elements are presented. Removal of the middle column of the frame was considered as an emergency impact. Analysis of the pattern cracking in the frames with a prestressed beam before and after a special impact is carried out against the pattern cracking in an unstressed frame structure. Based on the increments of cracks width in the beam, the coefficient of dynamic additional loading in prestressed frame structures from a special impact was calculated. The obtained results of experimental and theoretical researches of the crack resistance of frame structures in considered influences can be used in the development of methods for protecting the frames of monolithic multi-storey buildings against progressive collapse.

Experimental Study on Progressive Collapse Resistance of Reinforced Concrete Frame Structures

2011 ◽  
Vol 71-78 ◽  
pp. 871-875
Author(s):  
Yong Kang Zheng ◽  
Jin Gang Xiong ◽  
Zhao Qiang Wu ◽  
Yi Nong He
Keyword(s):  
Reinforced Concrete ◽  
Progressive Collapse ◽  
Frame Structure ◽  
Seismic Resistance ◽  
Seismic Demand ◽  
Concrete Frames ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Collapse Resistance ◽  
Reinforced Concrete Frame Structures

The progressive collapse of the frame structure is simulated with testing a 1/3 scale, 4×2-bay and 3-storey reinforced concrete spatial frame in this paper. The experimental model was designed according to the non-seismic resistance demand, and the middle-side column of the bottom floor was replaced by a mechanical jack to simulate its initial local damage. Based on the experimental results, the applied load process and the load transferring mechanism of the model frame are analyzed. The progressive collapse-resisting performance of reinforced concrete frames with non-seismic demand are obtained.

Resistance of Reinforced Concrete Frames with Masonry Infill Walls to In-Plane Vertical Loading

2016 ◽  
Vol 711 ◽  
pp. 982-988
Author(s):  
Alex Brodsky ◽  
David Z. Yankelevsky
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Progressive Collapse ◽  
Lateral Loading ◽  
Masonry Walls ◽  
Reinforced Concrete Frame ◽  
Masonry Infill ◽  
Concrete Frame ◽  
Vertical Loading ◽  
Infill Masonry

Numerous studies have been conducted on the in plane behavior of masonry infill walls to lateral loading simulating earthquake action on buildings. The present study is focused on a problem that has almost not been studied regarding the vertical (opposed to lateral) in-plane action on these walls. This may be of concern when a supporting column of a multi-storey reinforced concrete frame with infill masonry walls undergoes a severe damage due to an extreme loading such as a strong earthquake, car impact or military or terror action in proximity to the column. The loss of the supporting column may cause a fully or partly progressive collapse to a bare reinforced concrete frame, without infill masonry walls. The presence of the infill masonry walls may restrain the process and prevent the development of a progressive collapse. The aim of the present study is to test the in-plane composite action of Reinforced Concrete (RC) frames with infill masonry walls under vertical loading through laboratory experiments and evaluate the contributions of infill masonry walls, in an attempt to examine the infill masonry wall added resistance to the bare frame under these circumstances. Preliminary results of laboratory tests that have been conducted on reinforced concrete infilled frames without a support at their end, under monotonic vertical loading along that column axis will be presented. The observed damages and failure modes under vertical loading are clearly different from the already known failure modes observed in the case of lateral loading.

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