Research on Simplified RC Frame Column Model under Blast Load

2010 ◽  
Vol 163-167 ◽  
pp. 4346-4349
Author(s):  
Xing Guo Wang ◽  
Nan Ge ◽  
Cui Min Wang ◽  
You Po Su
Keyword(s):  
Reinforced Concrete ◽  
Numerical Model ◽  
Dynamic Load ◽  
Static Load ◽  
Impact Load ◽  
Rc Frame ◽  
Reinforced Concrete Frame ◽  
Simplified Models ◽  
Dynamic Behaviors ◽  
Concrete Frame

An overall numerical model for a reinforced concrete frame was established and in parallel, a group of simplified models were established for the same structure according to the particular characteristics of the subjected load such as impact load, dynamic load and quasi-static load, to investigate their dynamic behaviors. Results show that it is reasonable to introduce the simplified models for reinforced concrete frame in analysis work.

Research on the Collapse Performance of RC Frame Structure

2014 ◽  
Vol 556-562 ◽  
pp. 712-715
Author(s):  
Jing Zhao ◽  
Jing Zhao ◽  
Xing Wang Liu
Keyword(s):  
Reinforced Concrete ◽  
Frame Structure ◽  
Rc Frame ◽  
Hydraulic Actuator ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Load Paths ◽  
Rc Frame Structure ◽  
Gravity Load ◽  
Middle Column

In collapse-resistant design of a structure under accidental local action, it is important to understand the failure mechanism and alternative load paths. In this paper, a pseudo-static experimental method is proposed. Based on which, the collapse of frame structure was simulated with testing a 1/3 scale; 4-bay and 3-story plane reinforced concrete frame. In the experience, the middle column of the bottom floor was replaced by mechanical jacks to simulate its failure, and the simulated superstructure’s gravity load acted on the column of the top floor by adopting a servo-hydraulic actuator with force –controlled mode.

scholarly journals Rapid assessment of peak storey drift demands on reinforced concrete frame buildings

2019 ◽  
Vol 52 (3) ◽  
pp. 109-118
Author(s):  
Timothy J. Sullivan
Keyword(s):  
Reinforced Concrete ◽  
Linear Time ◽  
Rapid Assessment ◽  
Time History ◽  
Seismic Assessment ◽  
Rc Frame ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Frame Buildings ◽  
Rc Frame Buildings

The peak storey drift demands that an earthquake imposes on a building can be assessed through a detailed engineering seismic assessment or recorded if a building is instrumented. However, for the rapid seismic assessment of a large number of buildings, it is desirable to have a simplified means of estimating storey drift demands. Consequently, this paper proposes a simplified means of quickly estimating storey drift demands on reinforced concrete (RC) frame buildings. Expressions for peak storey drift demand as a function of ground motion intensity are developed by utilising concepts and simplifications available from displacement-based seismic design and assessment methods. The performance of the approach is gauged by comparing predicted storey drift demands with those obtained from rigorous non-linear time-history analyses for a number of case study buildings. The promising results suggest that the approach proposed will be useful for rapidly assessing the likelihood of damage to a range of drift-sensitive elements in modern RC frame buildings.

Analysis on Progressive Collapse Resistance of Reinforced Concrete Frame Structures

2011 ◽  
Vol 243-249 ◽  
pp. 717-723
Author(s):  
Jin Gang Xiong ◽  
Yon Kang Zheng ◽  
Guan Min Cai ◽  
Yan Li
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Progressive Collapse ◽  
Frame Structures ◽  
Rc Frame ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Collapse Resistance ◽  
Rc Frame Structures ◽  
Reinforced Concrete Frame Structures

In this paper the analysis is conducted to investigate the progressive collapse resistance of typical reinforced concrete(RC) multi-story frame structures, which are designed according to the China code for seismic design of buildings. The analysis results show that the progressive collapse resistance will be enhanced with the seismic fortification intensity increasing. The progressive collapse resistance of RC frame structures with low seismic fortification intensity are poor. This implies that as for RC frame structures with low seismic or non-seismic demand, close attention must be paid to continuity and ductility in order to prevent progressive collapse.

Full-Scale Experimental Investigations on Seismic Performance of Square RC Frame Columns with Hollow Sections

2019 ◽  
Vol 828 ◽  
pp. 40-52
Author(s):  
Can Tian Yang ◽  
Ai Qun Li ◽  
Yue Chen ◽  
Lin Lin Xie
Keyword(s):  
Seismic Performance ◽  
Axial Load ◽  
Static Load ◽  
Full Scale ◽  
Experimental Investigations ◽  
Rc Frame ◽  
Reinforced Concrete Frame ◽  
Hollow Section ◽  
Concrete Frame ◽  
New Type

A new type of square reinforced concrete frame column with a hollow section and spiral stirrups at the section corners is proposed. To investigate its seismic performance, three full-scale columns of this type and one full-scale conventional solid column were designed and tested under a quasi-static load. The failure mode, load-bearing, deformation, and energy-dissipation capacities of the proposed column were evaluated and compared with those of the solid column. The effects of the cavity ratio and axial load on the seismic performance were investigated.

Experimental Study on Hybrid Masonry Structure with RC Frame under Lateral Reversed Cyclic Loading

2018 ◽  
Author(s):  
Fei Zhang ◽  
Jianxun Ma
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Masonry Structure ◽  
Rc Frame ◽  
Structural System ◽  
Reinforced Concrete Frame ◽  
Displacement Ductility ◽  
Concrete Frame ◽  
Reversed Cyclic

<p>As a new type of structural system, hybrid masonry (HM) structure with reinforced concrete (RC) frame is constructed of reinforced block masonry wall and reinforced concrete frame. This structural system combines the advantages of reinforced concrete frame structure and reinforced concrete block masonry structure, also overcomes some limitations of them. In order to study the seismic performance of the structural system, the lateral reversed cyclic loading experiment on the HM structure with RC frame was conducted. In the experiment, two specimens that were constructed with different connecting type were designed and tested, in one of them the masonry blocks was separated from the RC frame and only connected with steel keys at the top part of the specimen, while in the other there was no spacing between the RC frame and the masonry blocks. According to the data of the experiment, the paper analyzed the failure process and patterns, hysteretic characteristic, skeleton curve, stiffness degradation and displacement ductility of the structural system, and compared the results of the two specimens. The experimental study indicated that the HM structure with RC frame showed extraordinary good seismic performance during testing, and this form of construction had fairly good displacement ductility and energy dissipation, which would provide a basis for further theoretical analysis and design method.</p>

Numerical investigation of reinforced concrete frame behavior subjected to progressive collapse

2018 ◽  
Vol 4 (3) ◽  
pp. 117 ◽  
Author(s):  
Mohammad Bagher Paripour ◽  
Ahmet Budak ◽  
Oğuz Akın Düzgün
Keyword(s):  
Reinforced Concrete ◽  
Structural Design ◽  
Progressive Collapse ◽  
Experimental Studies ◽  
Rc Frame ◽  
Structural Elements ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
A Chain ◽  
Good Agreement

Progressive collapse is defined as the spread of an initial local failure of a structure. This phenomenon, caused by the removal of one or more load-bearing element, is followed by a chain of failures through the structure and ultimately leads to partial or even full collapse of an entire structure. As a result, an accurate understanding of structural behavior subjected to large displacements, caused by progressive collapse, is essential to ensure a safe structural design. A progressive collapse in buildings often starts with the removal of one or more columns and continues with the collapse of adjoining structural elements. Experimental studies on progressive collapse are generally not recommended because of its cost and safety reasons. Today, as a result of progress in computer technology, more complicated problems can be investigated numerically. In this study, a numerical model is used for nonlinear analysis of a reinforced concrete (RC) frame behavior subjected to progressive collapse. It is obtained that there is a good agreement between the results with those of the experimental study given in the literature. According to the results, it can be predicted numerically the response of an RC frame to progressive collapse at a highly accurate level.

A Review of the Seismic Performance for FRP Reinforced RC Frame Joints

2013 ◽  
Vol 353-356 ◽  
pp. 2110-2113
Author(s):  
Zhi Hong Xie ◽  
Jian Hong Zhang ◽  
Li Sha Liu
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Rc Frame ◽  
Reinforced Concrete Frame ◽  
Performance Factors ◽  
Concrete Frame ◽  
Finite Element Numerical Simulation ◽  
And Performance ◽  
Basic Ideas

Reasonably effective methods of FRP strengthening can dramatically improve the ultimate bearing capacity, ductility and seismic performance of reinforced concrete frame joints. This paper, based on domestic and foreign experimental research and finite element numerical simulation which are working at improving bearing capacity and seismic performance of reinforced concrete frame joints, analyzes mechanism and performance factors of RC frame joints reinforced with FRP material, concludes with basic ideas and methods of FRP material RC joints, together with the direction of continuing studies.

scholarly journals Shear Behavior of a Reinforced Concrete Frame Retrofitted with a Hinged Steel Damping System

2020 ◽  
Vol 12 (24) ◽  
pp. 10360
Author(s):  
Hyun-Do Yun ◽  
Sun-Woong Kim ◽  
Wan-Shin Park ◽  
Sun-Woo Kim
Keyword(s):  
Reinforced Concrete ◽  
Shear Behavior ◽  
Seismic Retrofitting ◽  
Reinforced Concrete Frame ◽  
Main Research ◽  
Torsion Spring ◽  
Concrete Frame ◽  
Energy Dissipation Capacity ◽  
Research Questions ◽  
Torsion Springs

The purpose of this study was to experimentally evaluate the effect of a hinged steel damping system on the shear behavior of a nonductile reinforced concrete frame with an opening. For the experimental test, a total of three full-scale reinforced concrete frame specimens were planned, based on the “no retrofitting” (NR) specimens with non-seismic details. The main research questions were whether the hinged steel damping system is reinforced and whether torsion springs are installed in the hinged steel damping system. From the results of the experiment, the hinged steel damping system (DR specimen) was found to be effective in seismic retrofitting, while isolating the opening of the reinforced concrete (RC) frame, and the torsion spring installed at the hinged connection (DSR specimen) was evaluated to be effective in controlling the amount of deformation of the upper and lower dampers. The strength, stiffness, and energy dissipation capacity of the DSR specimen were slightly improved compared to the DR specimen, and it was confirmed that stress redistribution was induced by the rotational stiffness of the torsion spring installed in the hinge connection between the upper and lower frames.

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