Study on Effect of FRP Reinforced Manners on Seismic Performance of Concrete Frame Structure

2010 ◽  
Vol 133-134 ◽  
pp. 911-916 ◽  
Author(s):  
Ya Ping Peng ◽  
Ming Ma ◽  
Ming Xiu Chen
Keyword(s):  
Mechanical Properties ◽  
Seismic Performance ◽  
Plastic Hinge ◽  
Frame Structure ◽  
Nonlinear Static Analysis ◽  
Core Area ◽  
Performance Ratio ◽  
Concrete Frame ◽  
The Impact ◽  
Joint Core Area

Many studies showed that FRP bonded to the concrete beams and column surface can effectively enhance the mechanical properties of members, and FRP reasonably bonded to the beam-column joint area can significantly improve the seismic performance, but not enough studies have been carried out on the overall mechanical properties in structure after the framework members are partially covered with FRP. In this Paper, based on the seismic demand analysis of the concrete frame structure, as well as FRP seismic enforcement strategy, a fiber attachment method has been proposed for FRP seismic reinforcement framework. Taking a two-layer dual-span plane framework as an example, nonlinear static analysis has been carried out on FRP-reinforced framework, the capacity spectrum method has been adopted to assess the seismic performance of reinforced framework and the impact of different FRP-reinforced methods on structural seismic performance has been discussed. The results showed that the method of moderate shear-resistance reinforcement in the joint core area, as well as the beam-column plastic hinge area, can effectively improve the seismic performance of the framework, the application of GFRP reinforcement features higher cost-performance ratio, and the FRP bonding at ± 45º in the joint core area can better the reinforcement effect.

scholarly journals Experimental Study of a New Precast Prestressed Concrete Joint

2018 ◽  
Vol 8 (10) ◽  
pp. 1871 ◽  
Author(s):  
Xueyuan Yan ◽  
Suguo Wang ◽  
Canling Huang ◽  
Ai Qi ◽  
Chao Hong
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Prestressed Concrete ◽  
Precast Concrete ◽  
Concrete Strength ◽  
Frame Structure ◽  
Loading Test ◽  
Concrete Frame ◽  
Concrete Joints ◽  
Precast Prestressed Concrete

Precast monolithic structures are increasingly applied in construction. Such a structure has a performance somewhere between that of a pure precast structure and that of a cast-in-place structure. A precast concrete frame structure is one of the most common prefabricated structural systems. The post-pouring joint is important for controlling the seismic performance of the entire precast monolithic frame structure. This paper investigated the joints of a precast prestressed concrete frame structure. A reversed cyclic loading test was carried out on two precast prestressed concrete beam–column joints that were fabricated with two different concrete strengths in the keyway area. This testing was also performed on a cast-in-place reinforced concrete joint for comparison. The phenomena such as joint crack development, yielding, and ultimate damage were observed, and the seismic performance of the proposed precast prestressed concrete joint was determined. The results showed that the precast prestressed concrete joint and the cast-in-place joint had a similar failure mode. The stiffness, bearing capacity, ductility, and energy dissipation were comparable. The hysteresis curves were full and showed that the joints had good energy dissipation. The presence of prestressing tendons limited the development of cracks in the precast beams. The concrete strength of the keyway area had little effect on the seismic performance of the precast prestressed concrete joints. The precast prestressed concrete joints had a seismic performance that was comparable to the equivalent monolithic system.

Seismic Performance Evaluation for Steel Reinforced Concrete Frame Structures

2011 ◽  
Vol 255-260 ◽  
pp. 2421-2425
Author(s):  
Qiu Wei Wang ◽  
Qing Xuan Shi ◽  
Liu Jiu Tang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Seismic Performance Evaluation ◽  
Steel Reinforced Concrete ◽  
Concrete Frame ◽  
Structural Capacity ◽  
Reinforced Concrete Frame Structures ◽  
Dynamic Nonlinear Analysis

The randomness and uncertainty of seismic demand and structural capacity are considered in demand-capacity factor method (DCFM) which could give confidence level of different performance objectives. Evaluation steps of investigating seismic performance of steel reinforced concrete structures with DCFM are put forward, and factors in calculation formula are modified based on stress characteristics of SRC structures. A regular steel reinforced concrete frame structure is analyzed and the reliability level satisfying four seismic fortification targets are calculated. The evaluation results of static and dynamic nonlinear analysis are compared which indicates that the SRC frame has better seismic performance and incremental dynamic analysis could reflect more dynamic characteristics of structures than pushover method.

Seismic performance of ductile medium height reinforced concrete frame buildings designed in accordance with the provisions of the 1995 National Building Code of Canada

1999 ◽  
Vol 26 (5) ◽  
pp. 606-617 ◽  
Author(s):  
A C Heidebrecht ◽  
N Naumoski
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Frame Structure ◽  
Performance Criteria ◽  
Building Code ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Moment Resisting Frame ◽  
Moment Resisting ◽  
Interstorey Drift

This paper describes an investigation into the seismic performance of a six-storey ductile moment-resisting frame structure located in Vancouver and designed and detailed in accordance with the seismic provisions of the National Building Code of Canada (1995). Both pushover and dynamic analyses are conducted using an inelastic model of the structure as designed and detailed. The structural performance of a number of design variations is evaluated using interstorey drift and member curvature ductility response as performance measures. All frames studied are expected to perform at an operational level when subjected to design level seismic excitations and to meet life safe performance criteria at excitations of twice the design level.Key words: seismic, building, frames, ductile, design, performance, reinforced concrete, code.

Test Research on Seismic Performance of Beam

2012 ◽  
Vol 594-597 ◽  
pp. 1680-1683
Author(s):  
Hai Tao Wan ◽  
Yu Qing Yuan
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Effective Means ◽  
Test Method ◽  
Frame Structure ◽  
Beam Specimen ◽  
Rc Beam ◽  
Rc Beams ◽  
Reinforced Concrete Frame ◽  
Concrete Frame

Reinforced concrete ( RC) frame structure is one type of building structure which is widely used in China. Damage of some reinforced concrete frame structures under the earthquake is caused by the damage of RC beams, So RC beams are an essential seismic members. The paper introduces the design of RC beam specimen, mechanical properties of materials, production of RC beam specimen, test method, loading device, loading system, the contents of measurement and data acquisition in detail. From the above analysis, it is obvious that the test is the most effective means of studying the seismic performance of beam.

Analysis of the Impact of Concrete Compressive Strength Reduction in Joint Core Area on Super High-Rise Structures

2013 ◽  
Vol 438-439 ◽  
pp. 690-695
Author(s):  
Xiao Yu ◽  
Na Wu ◽  
Zhao Yang ◽  
Kai Xu
Keyword(s):  
Compressive Strength ◽  
Cross Sections ◽  
Concrete Strength ◽  
Nonlinear Finite Element ◽  
Core Area ◽  
Concrete Compressive Strength ◽  
Element Analysis ◽  
High Rise ◽  
The Impact ◽  
Joint Core Area

t is focused on a super high-rise building structure, of which the concrete compressive strength is reduced in joint core. The whole structure is calculated with program SATWE. Based on this calculation, integral stress analysis by MIDAS when concrete strength is reduced in joint core area and nonlinear finite element analysis by ANSYS on the joints of the worst cross-sections in the whole structure are developed. Thus the adverse effect of reduced concrete strength in joint core area on super high-rise structures is found out.

Research on Seismic Strengthening with the Performance of the Dynamic Measurement Method

2014 ◽  
Vol 1021 ◽  
pp. 152-155 ◽  
Author(s):  
Jian Jian Zhang ◽  
Yong Sheng Zhang
Keyword(s):  
Seismic Performance ◽  
Dynamic Characteristics ◽  
Residential Building ◽  
High Sensitivity ◽  
Modal Identification ◽  
Frame Structure ◽  
Test Results ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
High Rise

The structure of the dynamic characteristics can comprehensively reflect the seismic performance of the structure. By high sensitivity under external excitation vibration pickup pick structure dynamic response to obtain the dynamic characteristics of buildings, this paper introduces the principle of vibration test and modal identification method of information. To high-rise shear wall of reinforced concrete frame structure of a residential building as an example, has carried on the test, through the test results of the seismic performance of this structure after reinforcement.

Progressive Collapse Resistance of RC Structures with Tension Cables

2013 ◽  
Vol 405-408 ◽  
pp. 835-840
Author(s):  
Tie Cheng Wang ◽  
Zhi Ping Li ◽  
Hai Long Zhao
Keyword(s):  
Static Analysis ◽  
Progressive Collapse ◽  
Stable Condition ◽  
Frame Structure ◽  
Nonlinear Static Analysis ◽  
Force Model ◽  
Rc Structures ◽  
Concrete Frame ◽  
Collapse Resistance ◽  
Nonlinear Static

In this study, three tie force models of a 10-storey concrete frame structure were prepared to investigate the effects of these methods on the resistance of frame structures against progressive collapse. Four cases of different first-storey column removed were considered using nonlinear static analysis method and their performances were compared with each other. From the nonlinear static analysis, the tie force methods in DoD 2005 and DoD 2009 cannot improve progressive collapse resistance of the structure because horizontal cables don't play a full role. X-type tension cables provide alternative load paths after loss of a single column, and improve progressive collapse resistance of the structure. The X-type tie force model remained in stable condition after sudden removal of a corner column, an exterior column, or an interior column in the first storey.

scholarly journals Analysis and design of a base-isolated reinforced concrete frame building

1978 ◽  
Vol 11 (4) ◽  
pp. 245-254 ◽  
Author(s):  
L. M. Megget
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Time History ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Elastomeric Bearings ◽  
Analysis And Design ◽  
Concrete Frame ◽  
Frame Building ◽  
Reinforced Concrete Frame Structure

The paper describes the dynamic and static analyses and design of a four storey ductile reinforced concrete frame structure isolated from the foundations by elastomeric bearings incorporating lead energy dampers. Results from inelastic, time-history analyses for the isolated and non-isolated structure are compared for several input earthquake motions. The benefits of energy dampers in reducing the isolated building's response (shears, plastic hinge demands and interstorey drifts) are detailed. Differences from conventional ductile design and detailing as well as design recommendations are included.

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.

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