- Development of a precast bent cap system for seismic regions
- J.I. Restrepo ; M. Tobolski ; E. Matsumoto
- National Cooperative Highway Research NCHRP Program, Report 681, Transportation Research Board, Washington, D.C.
- Book Title / Journal:
- Year: 2011 , Volume: , Series:
- Earthquake engineering
PDF |
- Research and practice of response control for tall buildings in mainland China
- X. Lu ; H. Jiang
- Book Title / Journal: Procedia Engineering
- Year: 2011 , Volume: Vol.14 , Series:
- Earthquake engineering
- Description
- In the recent two decades a large amount of tall buildings have been constructed in Mainland China, offering goodv opportunities of research and practice for Chinese researchers and practioners in the field of structural engineering. Some research and practice achievements of response control for tall buildings in Mainland China in recent five years are introduced here, focusing on the performance-based seismic analysis and design of code-exceeding tall building aiming to design structures with predictable seismic performance in the future earthquake, shaking table model tests on complex tall buildings to evaluate the seismic performance of structures and accordingly revise the structural design, and the application of structural control technologies to better protect tall buildings from winds and earthquakes. Some typical examples of practical application, such as application of active tuned mass dampers (ATMD) in Shanghai World Financial Center Tower and application of deformation-related with damping and stiffness dampers in Zhengda Himalaya Hotel, are presented.
PDF |
- Failure mode of columns of existing R/C building damaged during the 2007 Niigata Chuetsu-Oki Earthquake
- D. Kato ; T. Nagahashi
- Book Title / Journal: Procedia Engineering
- Year: 2011 , Volume: Vol. 14 , Series:
- Earthquake engineering
- Description
- The school building investigated was a 3-story reinforced concrete (R/C) building built in 1963. The building suffered from a great deal of damage during both the 2004 Chuetsu Earthquake and the 2007 Chuetsu-Oki Earthquake. The damage of the first and second floors during Chuetsu Earthquake was light and that by Chuetsu-Oki Earthquake was moderate. The previous study revealed that the anticipated design failure modes of most of the columns of the building were flexure although most of them actually failed in shear during the 2007 earthquake. This is an important problem to be studied. In order to study the reason why the columns failed in shear rather than in flexural, a parametric study was conducted, paying attention to parameters including the strength of concrete, hoop spacing and subjected axial force. But those studies could not explain the real phenomenon clearly. After that the effects of cutoff location of longitudinal reinforcement bars were examined and it was concluded that the diagonal crack generated from cutoff point caused shear failure in these columns.
PDF |
- Cyclic test of a coupled steel plate shear wall substructure
- C. Li ; K. Tsai ; J. Chang ; C Lin
- Book Title / Journal: Procedia Engineering
- Year: 2011 , Volume: Vol. 14 , Series:
- Earthquake engineering
- Description
- This research aimed to investigate the seismic behavior and design of the Coupled Steel Plate Shear Wall (C-SPSW). A prototype six-story C-SPSW building was designed based on the model building code. A 40% scale specimen was constructed as the bottom two-and-half-story substructure of the six-story C-SPSW prototype. The reduced scale substructural specimen was cyclically tested using the Multi-Axial Testing System (MATS) at the National Center for Research on Earthquake Engineering (NCREE). In addition to the cyclic lateral forces, the constant vertical loading and cyclic overturning moments were applied on the specimen simultaneously. The test results show that the CSPSW specimen behaved in a ductile manner and dissipated significant amounts of hysteresis energy during the cyclic loadings. Finally, based on the experimental results, the implications in the capacity design for the bottom boundary column are discussed. A numerical simulation using finite element model was conducted. The analytical results quite match the overall and local experimental responses.
PDF |
- Seismic analysis of a typical masonry building from Barcelona’s Eixample District
- C. Potter
- Book Title / Journal: M.Sc Thesis, Universitat Politècnica de Catalunya
- Year: 2011 , Volume: , Series:
- Earthquake engineering
- Description
- The historic Eixample district of Barcelona is characterised by its beautiful avenues, laid out in grid
across the city. At first impression, the buildings lining these avenues appear identical, an unending
façade built to house the new Barcelona of the 20th Century. The unreinforced masonry buildings that
typify the development remain in use today, largely unaltered since their construction.
Unreinforced masonry buildings are among the most vulnerable structures to damage from seismic
actions. For the masonry buildings of the Eixample that house over 15% of the population of
Barcelona, this is no exception. This study performs a seismic analysis on a typical masonry building
of the Eixample to estimate and assess this damage. By doing so, it aims to estimate the likely
damage due to seismic actions, to identify critical elements of the structures and to quantify the need
for seismic risk maintenance and response plans.
The analysis uses the N2 Capacity Spectrum Method (Fajfar, 2000), adopted by Eurocode 8, to
determine the displacement demand of possible earthquake scenarios. A seismic hazard analysis
determines the seismic demand using deterministic, probabilistic and current European and Spanish
code provisions. The seismic demand is then compared to the results of a non-linear pushover
analysis completed using software DIANA (Version 9.4). The model geometry was based upon plans
of a building that well represents the typical unreinforced masonry buildings of the Eixample.
PDF |
- Structural behaviour and design of cold-formed steel wall systems under fire conditions.
- S. Gunalan
- Book Title / Journal: PhD thesis, Queensland University of Technology, Australia
- Year: 2011 , Volume: , Series:
- Structure types ; Steel structures
- Description
- This research has developed comprehensive experimental and numerical thermal and structural performance data for both the conventional and the proposed new load bearing LSF wall systems under standard fire conditions. Finite element models were developed to predict the failure times of LSF walls accurately. Idealized hot flange temperature profiles were developed for non-insulated, cavity and externally insulated load bearing wall systems. Suitable fire design rules and spread sheet based design tools were developed based on the existing standards to predict the ultimate failure load, failure times and failure temperatures of LSF wall studs. Simplified equations were proposed to find the critical temperatures for varying wall panel configurations and load ratios. The results from this research are useful to both structural and fire engineers and researchers. Most importantly, this research has significantly improved the knowledge and understanding of cold-formed LSF loadbearing walls under standard fire conditions.
PDF |
- Structural and thermal performance of cold-formed steel stud wall systems under fire conditions
- P. Kolarkar
- Book Title / Journal: PhD thesis, Queensland University of Technology, Australia
- Year: 2011 , Volume: , Series:
- Structure types ; Steel structures
- Description
- this research has developed comprehensive experimental thermal and structural performance data for both the conventional and the proposed non-load bearing and load bearing stud wall systems under fire conditions. Idealized hot flange temperature profiles have been developed for non-insulated, cavity insulated and externally insulated load bearing wall models along with suitable equations for predicting their failure times. A graphical method has also been proposed to predict the failure times (fire rating) of non-load bearing and load bearing walls under different load ratios. The results from this research are useful to both fire researchers and engineers working in this field. Most importantly, this research has significantly improved the knowledge and understanding of cold-formed LSF walls under fire conditions, and developed an innovative LSF wall system with increased fire rating. It has clearly demonstrated the detrimental effects of using cavity insulation, and has paved the way for Australian building industries to develop new wall panels with increased fire rating for commercial applications worldwide.
PDF |
- Design of building structures to improve their resistance to progressive collapse
- D. Nethercot
- Book Title / Journal: Procedia Engineering
- Year: 2011 , Volume: Vol.14 , Series:
- Other Structural
- Description
- It is rare nowadays for a “new topic” to emerge within the relatively mature field of Structural Engineering. Progressive collapse – or, more particularly, understanding the mechanics of the phenomenon and developing suitable ways to accommodate its consideration within our normal frameworks for structural design – can be so regarded. Beginning with illustrations drawn from around the world over several decades and culminating in the highly public WTC collapses, those features essential for a representative treatment are identified and early design approaches are reviewed. More recent work is then reported, concentrating on developments of the past seven years at Imperial College London, where a comprehensive approach capable of being implemented on a variety of levels and suitable for direct use by designers has been under development. Illustrative results are used to assist in identifying some of the key governing features, to show how quantitative comparisons between different arrangements may now be made and to illustrate the inappropriateness of some previous design concepts as a way of directly improving resistance to progressive collapse.
PDF |
- Very large floating structures: Applications, research and development
- C. Wang ; Z. Tay
- Book Title / Journal: Procedia Engineering
- Year: 2011 , Volume: Vol.14 , Series:
- Other Structural
- Description
- Very large floating structures (VLFS) have attracted the attention of architects, city planners, and engineers because they provide an exciting and environmentally friendly solution for land creation from the sea as opposed to the traditional land reclamation method. The applications of VLFS as floating piers, floating hotels, floating fuel storage facilities, floating stadia, floating bridges, floating airports, and even floating cities have triggered extensive research studies in the past two decades. The VLFS technology has developed considerably and there are many innovative methods proposed to minimize the hydroelastic motion, improve the mooring system and structural integrity of the VLFS. This keynote paper summarizes the applications, research and development of VLFS over the past two decades.
PDF |
- Twenty-five years of strengthening Wellington
- A.W. Thornton
- 2010 NZSEE, Conference. Paper Number 26
- Book Title / Journal:
- Year: 2010 , Volume: , Series:
- Repair and Retrofit of Structures
PDF |
- Organizational model of a hospital system
- G.P. Cimellaro ; A. Reinhorn ; M. Bruneau
- 2010 NZSEE Conference, Paper Number 20
- Book Title / Journal:
- Year: 2010 , Volume: , Series:
- Earthquake engineering
PDF |
- A Nonlinear Static (Pushover) Procedure Consistent with New Zealand Standards
- B.J. Davidson
- 2010 NZSEE Conference, Paper Number 35
- Book Title / Journal:
- Year: 2010 , Volume: , Series:
- Earthquake engineering
PDF |
- Limiting reinforcement ratios for RC f lexural members
- N. Subramanian
The Indian Concrete Journal, pp. 71-80 - Year: 2010
- Structure types ; Concrete structures
PDF |
- Sustainability of RCC Structures Using Basalt Composite Rebars
- N. Subramanian
Corrosion, The Masterbuilder, pp. 156-164 - Year: 2010
- Structure types ; Concrete structures
PDF |
- Behavior of Vertical Boundary Elements in Steel Plate Shear Walls
- B. Qu ; M. Bruneau
- Engineering Journal, 2nd Quarter, Vol.47, No.2, pp. 109-122
- Book Title / Journal:
- Year: 2010 , Volume: , Series:
- Structure types ; Steel structures
PDF |
