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.

The Modal Analysis of a Multilayer Concave-Convex Irregular Reinforced Concrete Frame Structures before and after Seismic Isolation

2013 ◽  
Vol 339 ◽  
pp. 632-634
Author(s):  
Fang Zhang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Isolation ◽  
Base Isolation ◽  
Frame Structure ◽  
Frame Structures ◽  
Reinforced Concrete Frame ◽  
Cycle Frequency ◽  
Concrete Frame ◽  
Before And After ◽  
Reinforced Concrete Frame Structures

It used lead core type laminated rubber pad as a base isolation device. Using the ANSYS software, it analyzed the modality of a multilayer concave-convex irregular reinforced concrete frame structures before and after seismic isolation. Comparison of the cycle, frequency and modal participation mass coefficient of the multilayer concave-convex irregular reinforced concrete frame structure before and after isolation in Kobe wave. It concluded that the lead laminated rubber bearings for multilayer concave-convex irregular reinforced concrete frame structures have seismic isolation effect.

Storey-Adding and Strengthening Design for A Reinforced Concrete Frame Structure

2013 ◽  
Vol 477-478 ◽  
pp. 671-674
Author(s):  
Fei Wang
Keyword(s):  
Reinforced Concrete ◽  
Frame Structure ◽  
Frame Structures ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structure ◽  
Before And After ◽  
Reinforced Concrete Frame Structures

This paper take a reinforced concrete frame structures storey-adding transformation as an example, analysising and calculating the whole structure adding layer before and after, then discussing the reinforcing measures of the column during the design of this processing. The using condition shows that reinforcing measures is very safe and effective that the project has adopted, and it can serve as a reference for the design of similar projects.

Base-Isolated Multi-Storey Reinforced Concrete Frame Structure Modal Analysis

2012 ◽  
Vol 204-208 ◽  
pp. 869-871
Author(s):  
Cai Hua Wang ◽  
Hui Jian Li ◽  
Jian Feng Wu
Keyword(s):  
Reinforced Concrete ◽  
Modal Analysis ◽  
Seismic Isolation ◽  
Base Isolation ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structure ◽  
Before And After ◽  
Isolation Device

The multi-storey reinforced concrete frame structure used lead rubber pad as the base isolation device. The paper had modal analysis of base-isolated multi-storey reinforced concrete frame structure using the ANSYS software. Comparing the frequency and vibration mode before and after isolation under El-Centro wave, It concluded the leader rubber pad have seismic isolation effect for multi-storey reinforced concrete frame structure .

Seismic Performance Analysis of Reinforced Concrete Frame Structures Based on Computational Mechanics

2021 ◽  
Author(s):  
Taochun Yang ◽  
Yanjun Li ◽  
Xiaohui Zhai
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Frame Structure ◽  
Frame Structures ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Multi Scale ◽  
Scale Modeling ◽  
Reinforced Concrete Frame Structure ◽  
Multi Scale Modeling

In order to study the degradation law and seismic performance of reinforced concrete frame structure with the extension of service time under normal service environment, the multi-scale modeling of corroded reinforced concrete frame is carried out by using the general finite element analysis software ABAQUS. The correctness of the multi-scale modeling method is verified by the experimental data of corroded reinforced concrete members and single frame. The pushover analysis and elastic-plastic time history analysis of a four story reinforced concrete frame structure are carried out by using a multi-scale model. Then the seismic response and damage of RC frame structures with different service time are compared. The experimental results show that the established seismic performance model of reinforced concrete frame structure is more practical in practical application and can meet the research requirements.

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.

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