Serviceability Limit State - Crack Width Calculation of Existing Deck Slab of a Jetty Berth by using Finite Element Analysis

2009 ◽  
Author(s):  
K. Nag
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Crack Width ◽  
Limit State ◽  
Element Analysis ◽  
Serviceability Limit State ◽  
Deck Slab

scholarly journals A comparative study on the performance of different types of wallslab connections in liquid containing concrete structures

2021 ◽  
Author(s):  
Nima Atashi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Comparative Study ◽  
Limit State ◽  
Concrete Structures ◽  
Element Analysis ◽  
Common Solution ◽  
Construction Joint ◽  
Linear Finite Element ◽  
Different Types

Waterstops are commonly used at cold joints in construction of liquid containing concrete structures. A common issue with application of waterstops, is their conflict with top layer of slab reinforcements. A common solution is to form an upturn part that raises the waterstop clear of the top slab bars. However, effects of these different types of construction joints on the performance of structures have not been investigated. To that end, full-scale wall-slab specimens, each representing a different type of construction joint, are built and tested under different monotonic and cyclic loadings. The performance of these specimens is compared with regards to first cracking, limit state capacity and leakage. Results of the tests show that conventional flat joint, behaves more rigidly compared to other types of joints. A non-linear finite element analysis of a typical wall-slab specimen, is also presented and its results are compared with the results of the experiments.

Performance Evaluation on Jointed Pipes Used Underground for Fire Protection at a Nuclear Power Plant as a Response to the Effects of the 2007 Niigata-Ken Chuetsu-Oki Earthquake

2009 ◽  
Author(s):  
Yusuke Sato ◽  
Yukihiro Toyoda ◽  
Shinichi Matsuura ◽  
Michiya Sakai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nuclear Power ◽  
Welded Joint ◽  
Limit State ◽  
Elastic Beam ◽  
Beam Theory ◽  
Bending Moment ◽  
Ground Displacement ◽  
Element Analysis

This study discusses the strength of jointed pipes used underground for fire protection at a nuclear power plant and their capacity to accommodate ground displacement. For this purpose, bending tests, a finite element analysis and an elastic beam theory analysis were conducted. The bending tests were conducted for four types of joints previously subjected to actual use, including welded, flange, screw and coupling types. The welded and flange joints demonstrated significantly higher load capacity; five times that of the coupled joint. The bending test results for the flange, screw and coupling joints were applied to identify the bending moment and rotation angle at the moment the internal pressure reached the level of the atmospheric pressure due to leakage. The limit state of the welded joint was not obtained in the experiment but was estimated by nonlinear finite element analysis. The bending moment and rotation angle of the welded joint were identified at the moment the welded joint reached the limit state. Finally, the test results and finite element analysis were applied to estimate the capacity of each joint to accommodate ground displacement. The elastic beam theory was used by modeling the pipe as an elastic beam and idealizing the joint as an elastic rotational spring. Consequently, the ground displacement capacity of the welded joint exceeded that of the coupling and screw joints by more than 500 per cent.

scholarly journals A comparative study on the performance of different types of wallslab connections in liquid containing concrete structures

2021 ◽  
Author(s):  
Nima Atashi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Comparative Study ◽  
Limit State ◽  
Concrete Structures ◽  
Element Analysis ◽  
Common Solution ◽  
Construction Joint ◽  
Linear Finite Element ◽  
Different Types

Waterstops are commonly used at cold joints in construction of liquid containing concrete structures. A common issue with application of waterstops, is their conflict with top layer of slab reinforcements. A common solution is to form an upturn part that raises the waterstop clear of the top slab bars. However, effects of these different types of construction joints on the performance of structures have not been investigated. To that end, full-scale wall-slab specimens, each representing a different type of construction joint, are built and tested under different monotonic and cyclic loadings. The performance of these specimens is compared with regards to first cracking, limit state capacity and leakage. Results of the tests show that conventional flat joint, behaves more rigidly compared to other types of joints. A non-linear finite element analysis of a typical wall-slab specimen, is also presented and its results are compared with the results of the experiments.

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