Ultimate internal pressure of Prestressed Concrete Containment Vessel analyzed by an integral constitutive model

2016 ◽  
Vol 21 (6) ◽  
pp. 2273-2280 ◽  
Author(s):  
Chaobi Zhang ◽  
Jianyun Chen ◽  
Jing Li
Keyword(s):  
Constitutive Model ◽  
Internal Pressure ◽  
Prestressed Concrete ◽  
Containment Vessel

An Approach for Performance-Based Capacity Assessment of Prestressed Concrete Containment Vessels for Internal Accidents Application to VVER 1000 Containment Vessel

2010 ◽  
Vol 5 (4) ◽  
pp. 452-462 ◽  
Author(s):  
Anton Andonov ◽  
◽  
Dimitar Stefanov ◽  
Marin Kostov
Keyword(s):  
Failure Mode ◽  
Prestressed Concrete ◽  
Structural Integrity ◽  
Damage Index ◽  
Capacity Assessment ◽  
Assessment Procedure ◽  
Performance Levels ◽  
Containment Vessel ◽  
Leak Tightness ◽  
Load Intensity

A direct procedure is proposed for capacity assessment of prestressed concrete containment structures subjected to internal accident loads. The assessment procedure is based on graphical comparison between the structural capacity and the load intensity by plotting both parameters in the same “temperature gradient – overpressure” coordinate system. Furthermore, the capacity in terms of structural integrity and leak tightness is evaluated, corresponding to different limit states or performance levels. A new damage index is proposed in order to correlate the intensity of damages on the containment structure with the load intensity. The criteria for leak tightness and structural integrity are adopted for VVER-1000 containment structure. The ultimate pressure capacity, the failure mode and the capacity corresponding to different performance levels of the containment structure are assessed. The influence of the temperature load on the structure response is also studied. Conclusions are drawn on the VVER-1000 containment vessel overpressure capacity and its response to different design basis and severe accidents. The main failure mode and the critical zones of the structure are also determined.

scholarly journals DEFORMATIONAL ANALYSIS OF PRESTRESSED HIGH‐STRENGTH CONCRETE MEMBERS USING FLEXURAL CONSTITUTIVE MODEL

2005 ◽  
Vol 11 (2) ◽  
pp. 145-151
Author(s):  
Renata Zamblauskaitė ◽  
Gintaris Kaklauskas ◽  
Darius Bačinskas
Keyword(s):  
Constitutive Model ◽  
Prestressed Concrete ◽  
Linear Time ◽  
High Strength ◽  
Concrete Members ◽  
Calculation Technique ◽  
Short And Long Term ◽  
Modulus Method ◽  
Creep And Shrinkage

In this paper, an attempt has been made to extend application of the recently proposed Flexural constitutive model to short‐ and long‐term deformational analysis of flexural partially prestressed concrete members. The effect of tension stiffening and non‐linear time effects of creep and shrinkage are taken into account. Effective modulus method is used for modelling long‐term deformations. The proposed calculation technique is based on the layered approach and use of material stress‐strain relationships. Curvatures prediction results were tested against experimental data of partially prestressed concrete beams reported in literature.

scholarly journals LONG‐TERM DEFORMATION ANALYSIS OF NON‐CRACKED PC MEMBERS USING FLEXURAL CONSTITUTIVE MODEL AND DESIGN METHODS

2006 ◽  
Vol 12 (2) ◽  
pp. 124-133
Author(s):  
Renata Zamblauskaite ◽  
Gintaris Kaklauskas ◽  
Povilas Vainiūnas
Keyword(s):  
Constitutive Model ◽  
Prestressed Concrete ◽  
Linear Time ◽  
Deformation Analysis ◽  
Stress And Strain ◽  
Concrete Members ◽  
Calculation Technique ◽  
Modulus Method ◽  
Creep And Shrinkage

In this paper, an attempt has been made to extend application of the recently proposed Flexural constitutive model to long‐term deformation analysis of prestressed concrete members. The effect of non‐linear time effects of creep and shrinkage are taken into account. Effective modulus method is used for modeling of long‐term deformations. The proposed calculation technique is based on the layered approach and use of material stress and strain relationships. Curvatures and deflections prediction results were tested against experimental data of prestressed concrete beams reported in the literature.

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