Evolution of French Airport Bearing Capacity Assessment

2021 ◽  
pp. 25-32
Author(s):  
Jean-Paul Guillon ◽  
Jean-Claude Deffieux
Keyword(s):  
Bearing Capacity ◽  
Capacity Assessment

scholarly journals Bearing Capacity Assessment of Collapsible Soils Improved by Deep Soil Mixing Using Finite Element Method

2016 ◽  
Vol 06 (09) ◽  
pp. 1055-1068
Author(s):  
Pouya Kavandi ◽  
Alireza Firoozfar ◽  
Mohammad Amin Hemmati
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Bearing Capacity ◽  
Capacity Assessment ◽  
Deep Soil ◽  
Soil Mixing ◽  
Collapsible Soils ◽  
Deep Soil Mixing ◽  
Element Method

Study on Bearing Capacity Assessment of Prefabricated RC Slab Bridges

2011 ◽  
Vol 243-249 ◽  
pp. 1750-1754
Author(s):  
Lan Lin Zou ◽  
Xing Lin Zhou
Keyword(s):  
Bearing Capacity ◽  
Safety Margin ◽  
Regression Equation ◽  
Capacity Assessment ◽  
Bridge Structure ◽  
Rc Slab ◽  
Strain Coefficient ◽  
Rational Range

The concept of frequency coefficient is built up based on theory，the formula between frequency coefficient and strain coefficient is established, and it was revised by the regression relational expression on the base of statistics results of 173 samples. The rational range of frequency coefficient was built by regression equation based on the confirmed range of strain coefficient, the frequency coefficient is regarded as a parameter to evaluate the bearing capacity of bridge structure, and its validity and rationality was proved by real project. The results shows that the structure is secure and with some safety margin when the frequency coefficient is greater than 1.111, the structure is dangerous when the frequency coefficient is less than 1.079, and the bearing capacity needs to be evaluated further when the coefficient is between1.111 and 1.079.

scholarly journals The civil structures bearing capacity assessment for 150 m high reinforced concrete ventilation pipe based on the field and numerical surveys

2020 ◽  
Vol 23 (1) ◽  
pp. 18-26
Author(s):  
M.H. Marienkov ◽  
K.M. Babik ◽  
D.V. Bogdan
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Ultrasonic Method ◽  
Concrete Structures ◽  
Capacity Assessment ◽  
Building Structures ◽  
Design Models ◽  
Spatial Design ◽  
Linear And Nonlinear ◽  
Seismic Impacts

In the paper the results of the building structures bearing capacity assessment are presented for a reinforced concrete ventilation pipe with a height of 150 m under seismic effects and tornado loads, taking into account the results of full-scale dynamic and instrumental building structures surveys, based on the linear and nonlinear spatial design models numerical studies. This goal was achieved by solving the following tasks: the vibrodynamic surveys execution; the concrete structures strength determination by an ultrasonic method; development of linear and nonlinear spatial design models of the pipe; the calculations of class F3 tornado effects and intensities 6 (MDE) and 7 (above MDE) seismic impacts. Based on the results of vibrodynamic surveys, the actual dynamic parameters of the ventilation pipe structures were determined (vibration modes, prevailing periods and frequencies during principal modes vibrations). Based on the results of structures instrumental studies by ultrasonic method, the actual characteristics of concrete structures strength are determined. The obtained field data were used in the development of the facility spatial design models. To determine the bearing capacity of structures, the models calculations were performed using the LIRA CAD software package, which is a computer system for structural analysis and design. The calculations were performed for the class F3 tornado loads, as well as the intensities 6 and 7 seismic effects determined by the spectral method. Additionally, the bearing capacity of facility reinforced concrete structures was assessed under extreme loads (intensity 7 seismic impacts and class F3 tornado) taking into account the concrete and reinforcement plastic properties. The structures non-linear static analysis (Pushover analysis) applied in the standards of Ukraine, the European Union, the USA and other countries for the assessment of the operating structures seismic resistance was used. Based on the results of the research, the reinforced concrete ventilation pipe structures stress-strain state parameters under the considered seismic and tornado loads were obtained and the recommendations were prepared to reduce the possible consequences of an intensity 7 earthquake and a class F3 tornado.

scholarly journals The civil structures bearing capacity assessment for 150 m high reinforced concrete ventilation pipe based on the field and numerical surveys

2020 ◽  
Vol 23 (1) ◽  
pp. 18-26
Author(s):  
M.H. Marienkov ◽  
K.M. Babik ◽  
D.V. Bogdan
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Ultrasonic Method ◽  
Concrete Structures ◽  
Capacity Assessment ◽  
Building Structures ◽  
Design Models ◽  
Spatial Design ◽  
Linear And Nonlinear ◽  
Seismic Impacts

In the paper the results of the building structures bearing capacity assessment are presented for a reinforced concrete ventilation pipe with a height of 150 m under seismic effects and tornado loads, taking into account the results of full-scale dynamic and instrumental building structures surveys, based on the linear and nonlinear spatial design models numerical studies. This goal was achieved by solving the following tasks: the vibrodynamic surveys execution; the concrete structures strength determination by an ultrasonic method; development of linear and nonlinear spatial design models of the pipe; the calculations of class F3 tornado effects and intensities 6 (MDE) and 7 (above MDE) seismic impacts. Based on the results of vibrodynamic surveys, the actual dynamic parameters of the ventilation pipe structures were determined (vibration modes, prevailing periods and frequencies during principal modes vibrations). Based on the results of structures instrumental studies by ultrasonic method, the actual characteristics of concrete structures strength are determined. The obtained field data were used in the development of the facility spatial design models. To determine the bearing capacity of structures, the models calculations were performed using the LIRA CAD software package, which is a computer system for structural analysis and design. The calculations were performed for the class F3 tornado loads, as well as the intensities 6 and 7 seismic effects determined by the spectral method. Additionally, the bearing capacity of facility reinforced concrete structures was assessed under extreme loads (intensity 7 seismic impacts and class F3 tornado) taking into account the concrete and reinforcement plastic properties. The structures non-linear static analysis (Pushover analysis) applied in the standards of Ukraine, the European Union, the USA and other countries for the assessment of the operating structures seismic resistance was used. Based on the results of the research, the reinforced concrete ventilation pipe structures stress-strain state parameters under the considered seismic and tornado loads were obtained and the recommendations were prepared to reduce the possible consequences of an intensity 7 earthquake and a class F3 tornado.

CAPWAP and Refined Wave Equation Analyses for Driveability Predictions and Capacity Assessment of Offshore Pile Installations

2009 ◽  
Author(s):  
Frank Rausche ◽  
Matt Nagy ◽  
Scott Webster ◽  
Liqun Liang
Keyword(s):  
Wave Equation ◽  
Bearing Capacity ◽  
Dynamic Monitoring ◽  
Capacity Assessment ◽  
Pile Driving ◽  
Soil Resistance ◽  
Driving Dynamic ◽  
Deep Foundation ◽  
Driving System ◽  
Equation Analysis

Open ended pipe piles have to be driven in the offshore environment primarily as platform support piles or as conductor pipes. In either case, deep penetrations have to be achieved. In preparation of these potentially difficult installations, equipment selection and stress control is done by a predictive wave equation analysis. During pile driving, dynamic monitoring combined with CAPWAP signal matching analysis is a preferred method for bearing capacity assessment. After the fact, if dynamic measurements were not provided during pile driving, a wave equation analysis can again help perform a post-installation analysis for bearing capacity assessment, assuming a variety of parameters. Wave equation analyses require a variety of input parameters describing hammer and driving system performance and the pseudo-static and dynamic behavior of the soil. Measurements taken during the installation yield immediate results about hammer and pile performance. Soil resistance parameters can be extracted by careful signal matching analysis. Unfortunately, the measurement and associated analysis results cannot be used without further modification in the wave equation analysis, because the wave equation approach requires simplifications in hammer, driving system and soil models. Thus, a final step is the so-call Refined Wave Equation Analysis which combines all results obtained and produces a best possible match between measurements and analyses. This paper describes the process of the three analysis phases utilizing typical offshore pile installation records. The paper also gives guide lines for this analysis process as well as a summary of limitations. An important part of the paper includes recommendations for and discussion of the modeling of the soil resistance near the open ended pipe bottom. Finally, the paper discusses how the results should be used for greatest benefit of the deep foundation industry.

Analysis on the Capacity of Old Highway Bridge

2013 ◽  
Vol 791-793 ◽  
pp. 358-361
Author(s):  
Ya Xun Yang ◽  
Wei Shan Wang ◽  
Chao Qiao
Keyword(s):  
Bearing Capacity ◽  
Load Test ◽  
Capacity Assessment ◽  
Highway Bridge ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges

Most bridges show different degrees of disease in the operations many years later. Combing the bridge disease investigation, materials inspection and load test done on the background of the interchanges over Yicheng-Houma expressway, this paper will make assessment of the frequently-used box-girder bridges' bearing capacity in the expressway to provide a reference for bearing capacity assessment of the old expressway bridges.

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