Pseudo-Dynamic Test of Full-Scale Rcs Frame: Part I - Design, Construction, Testing

2004 ◽  
Author(s):  
C. H. Chen ◽  
W. C. Lai ◽  
P. Cordova ◽  
G. G. Deierlein ◽  
K. C. Tsai
Keyword(s):  
Dynamic Test ◽  
Full Scale ◽  
Design Construction

scholarly journals Constraints, performance and perspectives of anaerobic sewage treatment: lessons from full-scale sewage treatment plants in Brazil

2019 ◽  
Vol 80 (3) ◽  
pp. 418-425 ◽  
Author(s):  
T. Bressani-Ribeiro ◽  
L. A. Chamhum-Silva ◽  
C. A. L. Chernicharo
Keyword(s):  
Sewage Treatment ◽  
Full Scale ◽  
Upflow Anaerobic Sludge Blanket ◽  
Operational Performance ◽  
Anaerobic Sludge ◽  
Anaerobic Reactors ◽  
Anaerobic Sludge Blanket ◽  
Operational Constraints ◽  
Uasb Reactors ◽  
Design Construction

Abstract There are hundreds of full-scale upflow anaerobic sludge blanket (UASB) reactors in operation in various parts of the tropical world, notably in India and Latin America, Brazil being the holder of the largest park of anaerobic reactors for sewage treatment in the world. Despite the recognized advantages of UASB reactors, there are problems that have prevented their maximum operational performance. Neglecting the existence and delaying the solution of these challenges can jeopardize the important advances made to date, impacting the future of anaerobic technology in Brazil and in other countries. This work aims to evaluate the operational performance of five full-scale UASB reactors in Brazil, taking into account a monitoring period ranging between two and six years. The main observed design, construction, and operational constraints are discussed. Some outlooks for important upcoming developments are also provided, considering that most of the observed drawbacks can be tackled without significant increases on reactor costs.

scholarly journals Verification of Optimized Real-time Hybrid Control System for Prediction of Nonlinear Materials Behavior with 3-DOF Dynamic Test

2020 ◽  
Vol 10 (11) ◽  
pp. 4037 ◽  
Author(s):  
Okpin Na ◽  
Jejin Park
Keyword(s):  
Control System ◽  
Real Time ◽  
Shaking Table Test ◽  
Hybrid Control ◽  
Dynamic Test ◽  
Full Scale ◽  
Test Method ◽  
Shaking Table ◽  
Hybrid Test ◽  
Hybrid Control System

Real-time hybrid method is an economical and efficient test method to evaluate the dynamic behavior. The purpose of this study is to develop the computational algorithm and to prove the reliability of a real-time hybrid control system. For performing the multi-direction dynamic test, three dynamic actuators and the optimized real-time hybrid system with new hybrid simulation program (FEAPH) and a simplified inter-communication were optimized. To verify the reliability and applicability of the real-time hybrid control system, 3-DOF (3 Degrees of Freedom) non-linear dynamic tests with physical model were conducted on a steel and concrete frame structure. As a ground acceleration, El Centro and Northridge earthquake waves were applied. As a result, the maximum error of numerical analysis is 13% compared with the result of shaking table test. However, the result of real-time hybrid test shows good agreement with the shaking table test. The real-time hybrid test using FEAPH can make good progress on the total testing time and errors. Therefore, this test method using FEAPH can be effectively and cheaply used to evaluate the dynamic performance of the full-scale structure, instead of shaking table and full-scale test.

scholarly journals Dynamic and Quasi-Static Grade Crossing Collision Tests

2009 ◽  
Author(s):  
Michelle Mu¨hlanger ◽  
Patricia Llana ◽  
David Tyrell
Keyword(s):  
Energy Absorption ◽  
Impact Load ◽  
Dynamic Test ◽  
Full Scale ◽  
Structural Deformation ◽  
Longitudinal Deformation ◽  
Static Tests ◽  
Static Test ◽  
Grade Crossing ◽  
The Impact

To support the development of a proposed rule [1], a full-scale dynamic test and two full-scale quasi-static tests have been performed on the posts of a state-of-the-art (SOA) end frame. These tests were designed to evaluate the dynamic and quasi-static methods for demonstrating energy absorption of the collision and corner posts. The tests focused on the collision and corner posts individually because of their critical positions in protecting the operator and passengers in a collision where only the superstructure, not the underframe, is loaded. There are many examples of collisions where only the superstructure is loaded. For the dynamic test, a 14,000-lb cart impacted a standing cab car at a speed of 18.7 mph. The cart had a rigid striking surface in the shape of a coil mounted on the leading end that concentrated the impact load on the collision post. During the dynamic test the collision post deformed approximately 7.5 inches, and absorbed approximately 137,000 ft-lbs of energy. The SOA collision post was successful in preserving space for the operators and the passengers. For the quasi-static test of the collision post, the collision post was loaded in the same location and with the same fixture as the dynamic test. The post absorbed approximately 110,000 ft-lb of energy in 10 inches of permanent, longitudinal deformation. For the quasi-static test of the corner post, the post was loaded at the same height as the collision post, with the same fixture. The corner post absorbed 136,000 ft-lb of energy in 10 inches of permanent, longitudinal deformation. The series of tests was designed to compare the dynamic and quasi-static methods for measuring collision energy absorption during structural deformation as a measure of crashworthiness. When properly implemented, either a dynamic or quasi-static test can demonstrate the crashworthiness of an end frame.

Qualification of Unbonded Dynamic Riser With Carbon Fiber Composite Armours

2012 ◽  
Author(s):  
Anaïs Lambert ◽  
Anh-Tuan Do ◽  
Antoine Felix-Henry ◽  
François Grosjean
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Dynamic Test ◽  
Full Scale ◽  
Carbon Fiber Composite ◽  
Flexible Pipes ◽  
Dynamic Loadings ◽  
Prototype Structure ◽  
Service Application ◽  
Sour Service

The development of Ultra Deep Water (UDW) oil and gas fields, down to 3000 m and beyond, requires high specification flowline and riser systems. At these depths, the flexible pipes must withstand high axial loads and severe dynamic loadings generated by currents, waves and vessel motions. Moreover, the constraints generated by the dynamic loadings are often combined to corrosion issues linked to the presence of CO2 and H2S. In case of sour service application, the structural layers of a classical flexible pipe require the use of steel with reduced mechanical properties compared to a sweet service application. The combination of UDW and sour service applications consequently lead to a riser design of considerable top tension. The main challenges of such applications are the suspended weight and the fatigue / corrosion performances. Carbon fiber composite have demonstrated high specific strength and outstanding corrosion and fatigue damage resistance. The use of carbon fiber composite instead of conventional steel for the tensile armour layers of flexible pipes represents a great alternative for the development of UDW applications combined with sour service conditions. Technip has been engaged for a number of years in the development and qualification program of Carbon Fiber Composite (CFC) Armour. In 2011, an important step has been passed with the successful realization of a full-scale tension-flexion dynamic test. The program of the full-scale dynamic test is based on a representative Brazilian offshore project, a typical UDW application. The CFC prototype structure was designed considering a 9” gas export riser installed at a water depth of 2140m, in free hanging configuration. The riser is made of 2 parts: a top riser with CFC armours and a bottom riser with steel armours. 1.8 millions of cycles were performed without damage, combining internal pressure, tensile loading and bending cycling. The whole test was monitored by acoustic emission to detect the potential damage of the CFC armours. After explaining the advantages of CFC structures compared to traditional steel structures, the paper will focus on the realization of the full-scale dynamic test program. It will detail the design and manufacture of the prototype structure, the construction of the test program representative of the offshore conditions first and then extended to more severe loadings. The paper will also present fatigue analysis and the construction of the CFC fatigue curves.

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