- Scalable parallel dynamic fracture simulation using an extrinsic cohesive zone model
- W. Celes ; G.H. Paulino ; K. Park ; R. Espinha
- Book Title / Journal: Computer Methods in Applied Mechanics and Engineering, 266, 144–161
- Year: 2013 , Volume: , Series:
- Structural Analysis
PDF |
- UHPC – Development and Testing on Structural Elements
- J.L. Vítek ; R. Coufal ; D. Čítek
- Book Title / Journal: Procedia Engineering
- Year: 2013 , Volume: 65 , Series:
- Structure types ; Concrete structures
- Keywords: Anchorage zone ; ultra high performance concrete
- Description
- Ultra high performance concrete (UHPC) is developed using the local constituents. The concrete mix exceeding the compression cylinder strength of 150 MPa was thoroughly tested. Its production in industrial mixing plants was verified. Its application in structures required additional tests investigating the performance of anchoring zones and bond between steel and UHPC. The tests showing the load carrying capacity of structural elements were carried out. The developed concrete mixes are now used for construction of a footbridge.
PDF |
- A reconnaissance report on two Iran, Makran Earthquakes
- H. Mirzaei-Alavijeh ; E. Farzanegan ; F. Sinaiean ; M.. Mahdian ; M Daneshdust ; M.P.M. Shahvar ; H. Heydari ; A. Ansari ; M. Zare
- Book Title / Journal: The Earthquake Engineering Research Institute (EERI)
- Year: 2013 , Volume: , Series:
- Earthquake engineering ; Seismic effects
PDF |
- Seismic retrofitting solution of an adobe masonry wall
- C. Oliveira ; D. Silveira ; A Costa ; H. Varum ; A. Figueiredo
- text
- Book Title / Journal: Materials and Structures, RILEM, 46, 1-2, 203-219
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
PDF |
- Deformation capacity of unreinforced masonry walls subjected to in-plane loading: a state-of-the-art review
- A.H. Salmanpour ; N. Mojsilovic ; J. Schwartz
- Book Title / Journal: International Journal of Advanced Structural Engineering
- Year: 2013 , Volume: 5 , Series:
- Structure types ; Masonry Structures
- Keywords: Deformation capacity ; Shear test ; Macro-element ; Structural masonry
PDF |
- Approximation of incompressible large deformation elastic problems: some unresolved issues
- F. Auricchio ; L. Beirão da Veiga ; C. Lovadina ; A. Reali ; R. Taylor ; P. Wriggers
- Book Title / Journal: Computational Mechanics
- Year: 2013 , Volume: 52 , Series:
- Structural Analysis
- Keywords: Incompressible nonlinear elasticity ; Stability ; Mixed finite elements
- Description
- Several finite element methods for large deformation elastic problems in the nearly incompressible and purely incompressible regimes are considered. In particular, the method ability to accurately capture critical loads for the possible occurrence of bifurcation and limit points, is investigated. By means of a couple of 2D model problems involving a very simple neo-Hookean constitutive law, it is shown that within the framework of displacement/pressure mixed elements, even schemes that are inf-sup stable for linear elasticity may exhibit problems when used in the finite deformation regime.The roots of such troubles are identified but a general strategy to cure them is still missing. Furthermore,
a comparison with displacement-based elements,
especially of high order, is presented.
- Abstract
PDF |
- The dimensional reduction modelling approach for 3D beams: Differential equations and finite-element solutions based on Hellinger–Reissner principle
- F. Auricchio ; G. Balduzzi ; C. Lovadina
- Book Title / Journal: International Journal of Solids and Structures
- Year: 2013 , Volume: 50 , Series:
- Structural Analysis
- Keywords: Linear elastic beam ; Mixed variational modelling ; Beam analytical solution ; Beam analytical solution Static analysis
- Description
- This paper illustrates an application of the so-called dimensional reduction modelling approach to obtain a mixed, 3D, linear, elastic beam-model.
We start from the 3D linear elastic problem, formulated through the Hellinger–Reissner functional, then we introduce a cross-section piecewise-polynomial approximation, and finally we integrate within the cross section, obtaining a beam model that satisfies the cross-section equilibrium and could be applied to inhomogeneous bodies with also a non trivial geometries (such as L-shape cross section). Moreover the beam model can predict the local effects of both boundary displacement constraints and non homogeneous
or concentrated boundary load distributions, usually not accurately captured by most of the
popular beam models.
We modify the beam-model formulation in order to satisfy the axial compatibility (and without violating equilibrium within the cross section), then we introduce axis piecewise-polynomial approximation, and finally we integrate along the beam axis, obtaining a beam finite element. Also the beam finite elements have the capability to describe local effects of constraints and loads. Moreover, the proposed beam finite element describes the stress distribution inside the cross section with high accuracy.
In addition to the simplicity of the derivation procedure and the very satisfying numerical performances, both the beam model and the beam finite element can be refined arbitrarily, allowing to adapt the model accuracy to specific needs of practitioners.
PDF |
- The finite element method enriched by interpolation covers
- J. Kim ; K.J. Bathe
- Book Title / Journal: Computers and Structures
- Year: 2013 , Volume: , Series: 116
- Structural Analysis
- Keywords: Enriched finite elements ; Cover functions ; Adaptive interpolation
- Description
- In this paper, we focus on an enriched finite element solution procedure for low-order elements based on the use of interpolation cover functions. We consider the 3-node triangular and 4-node tetrahedral displacement-based elements for two- and three-dimensional analyses, respectively. The standard finite element shape functions are used with interpolation cover functions over patches of elements to increase the convergence of the finite element scheme. The cover functions not only capture higher gradients of a field variable but also smooth out inter-element stress jumps. Since the order of the interpolations in the covers can vary, the method provides flexibility to use different covers for different patches and increases the solution accuracy without any local mesh refinement. As pointed out, the procedure can be derived from various general theoretical approaches and the basic theory has been presented earlier. We evaluate the effectiveness of the method, and illustrate the power of the scheme through the solution of various problems. The method also has potential for the development of error measures.
PDF |
- The Mw 6.6 Earthquake of April 20, 2013 in Lushan, China
- M. Lew ; Y. Xiao
- Book Title / Journal: EERI Report
- Year: 2013 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Lushan ; China ; EERI
- Description
- This report is based on two accounts from EERI members. Marshall Lew, AMEC, Los Angeles,
CA, made a one-day visit on May 28th to Lushan County of Ya’an City in Sichuan Province in
southwestern China; Yu Xiao, urban planner, College Station, TX, paid a two-day visit to the
same area in early June. Because Lushan County was one of the 41 severely damaged areas
in the 2008 Wenchuan earthquake, the main goal of Xiao’s field visit was to determine whether
lessons from the previous quake are being used to guide emergency management, temporary shelter/housing, and recovery planning. After her visit, she received updates from contact
persons in China.
PDF |
- The November 7, 2012 M7.4 Guatemala Earthquake and its Implications for Disaster Reduction and Mitigation
-
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Earthquake engineering ; Seismic effects
- Keywords: Guatemala earthquake 2012 ; disaster reduction ; disaster mitigation
- Description
- During the first week of April 2013 a group of engineers from EERI and AGIES, along with consultants from the World Bank, visited some of the areas affected by the November 7, 2012 M7.4 earthquake. The main purpose of the visit was to collect information about the effects of the earthquake and to gain insight into current construction practices in the regions damaged. This
report is the first in a series of case studies being
developed by EERI on recovery and resilience in
developing countries. It was funded by a grant
agreement between EERI and the Global Facility for
Disaster Recovery and Reconstruction (GFDRR) at The World Bank. The field study conducted by AGIES, EERI, and the World Bank, is a best practice worthy of replication for understanding the causes of structural damage and improving building codes and standards accordingly.
PDF |
- Dingman Drive Bridge: Reinstatement of severed strands on prestressed concrete girders damaged by vehicle impact
- A.F. Turnbull ; W.F. Young ; C. Lam
- PCI Journal, Winter 2013, pages 45-54.
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Bridges
PDF |
- Soft story risk reduction: lessons from the Berkeley data
- D. Bonowitz ; S. Rabinovici
- A Special Projects and Initiatives report to Earthquake Engineering Research Institute, EERI.
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Earthquake engineering
PDF |
- Preservation of historical monumental structures using fibre reinforced polymer (FRP) - Case studies
- S.S. Sivaraja ; T.S. Thandavamoorthy ; S. Vijayakumar ; S.M. Aranganathan ; A.K. Dasarathy
- Procedia Engineering, Vol. 54, pages 472-479
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
PDF |
- The utility theory in maintenance and repair strategy
- O. Kaplinski
- Procedia Engineering, Vol. 54, pages 604-614
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
PDF |
- In-situ health assessment of a poorly executed pre-stressed in-service concrete bridge and suggesting a rehabilitation strategy – A case study
- S.A. Rizwan ; F.A. Najam ; M.A. Qureshi
- Procedia Engineering, Vol. 54, pages 636-647
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Bridges
PDF |
