The construction of the Chicago Spire was put on hold after the completion of the substructure due to financial issue of the developer but the latest news is that it seems some company wants to save the project and continue its construction this year.
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This release is the first Bentley branded and licensed version of the former FormSys product Multiframe.
Fast and accurate structural analysis is the foundation of all computer aided structural design. Multiframe helps you get the results you need by providing powerful, yet easy to use analysis and design capabilities. Multiframe's analysis and design tools give you an exceptionally powerful and flexible means of creating, analyzing and examining results for your structures. Multiframe Automation using VBA is a feature unique among structural analysis programs. Using Automation, you can prepare calculations and drawings in Excel, Word or AutoCAD and dynamically access any and all of the design data you need directly from the Multiframe model. In Word, you can prepare a design template document and have it filled out automatically by data from Multiframe. In AutoCAD, you can automatically generate a drawing from a Multiframe model, or alternatively, generate a Multiframe model dynamically, directly from an AutoCAD drawing.
Multiframe is available in two versions to provide solutions matched to the varied tasks that you perform: Multiframe - 3D structural analysis and design; Multiframe Advanced - 3D structural dynamic analysis and design.
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Dear Admin. & Forum Staff and friends
about the forum ( Journals,papers and presentations ) my suggestion is to Re- arrange or divide this forum due to the similar subjects and titles
in this forum you can recognize a lot of posts under a similar titles or subjects while the post include (20 - 30) pages
thanks in advance
best regards
Freeway Geometric Design for Active Traffic Management in Europe
Author: U.S. Department of Transportation | Size: 4 MB | Format:PDF | Quality:Unspecified | Publisher: CreateSpace Independent Publishing Platform | Year: 2014 | pages: 90 | ISBN: 1480263869, 9781480263864
Continued growth in travel on congested urban freeway corridors exceeds the ability of agencies to provide sufficient solutions and alternatives based on traditional roadway expansion and improvement projects. Several countries are implementing managed motorway concepts to improve motorway capacity without acquiring more land and building large-scale infrastructure projects. The Federal Highway Administration, American Association of State Highway and Transportation Officials, and National Cooperative Highway Research Program sponsored a scanning study of England, Germany, the Netherlands, and Spain to examine the use of innovative geometric design practices and techniques to improve the operational performance of congested freeway facilities without compromising safety. Managed motorways are a combination of active or dynamically managed operational regimes, specific designs of infrastructure, and technology solutions. The concept uses a range of traffic management measures to actively monitor the motorway and dynamically control speeds, add capacity, and inform road users of conditions on the network with the objective to optimize traffic and safety performance. Examples include shoulder running, variable mandatory speed limits, lane control signals, and driver information using variable message signs. Managed motorways increase journey reliability and throughput of a motorway by speed management and increase capacity by shoulder running.
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Nonlinear models of elastic and visco–elastic onedimensional continuous structures (beams and cables) are formulated by the authors of this title. Several models of increasing complexity are presented: straight/curved, planar/non–planar, extensible/inextensible, shearable/unshearable, warpingunsensitive/ sensitive, prestressed/unprestressed beams, both in statics and dynamics. Typical engineering problems are solved via perturbation and/or numerical approaches, such as bifurcation and stability under potential and/or tangential loads, parametric excitation, nonlinear dynamics and aeroelasticity. Contents 1. A One–Dimensional Beam Metamodel. 2. Straight Beams. 3. Curved Beams. 4. Internally Constrained Beams. 5. Flexible Cables. 6. Stiff Cables. 7. Locally–Deformable Thin–Walled Beams. 8. Distortion–Constrained Thin–Walled Beams.
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Article/eBook Full Name: Analysis of USCD Columns By Modified Compression Theory
Author(s): E. Bentz
Publish Date: 1/1/2002
ISBN: DOI: 10.14359/11638
Published By: The International Concrete Abstracts Portal - ACI, Special Publication
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Seismic Reliability Analysis of Cable Stayed Bridges Against First Passage Failure
Author: Rehan Ahmad Khan Aligarh Muslim University India | Size: 810 KB | Format:PDF | Quality:Unspecified | pages: 29
In many structural applications, the ultimate purpose of using stochastic analysis is to determine the reliability of a structure, which has been designed to withstand the random
excitations. The present study is concerned with one of the failures, which are the results of the dynamic response of the stable cable stayed bridges. If Y(t) is the dynamic response (either deflection, strain or stress) of the bridge at a critical point, the bridge may fail upon the occurrence of one of the following cases (Y.K. Lin, 1967):
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SIMULATION TECHNIQUES FOR COLLAPSE ANALYSIS OF RC BRIDGE UNDER STRONG EARTHQUAKE
Author: Li-min Sun , Xing-peng Yu and Cen Zhou | Size: 640 KB | Format:PDF | Quality:Unspecified | Publisher: 4th International Conference on Earthquake Engineering Taipei, Taiwan October 12-13, 2006 | Year: 2006 | pages: 13
Collapse analysis is becoming increasingly significant as the performance-based design is being gradually adopted in the seismic design of bridges. To deal with the strong nonlinearity and large deformation of the structure, dynamic simulation methods were introduced in this paper. Some
simulation techniques were used to realize the fracture of structural member; and the contact and impact of broken reinforced concrete member with each other were also taken into consideration in the methods. The simulation of the whole collapse process of Cypress Double-deck Viaduct in 1989 Loma Prieta was performed with the above method. The analysis results agree well with the damage observed in site and this indicated that the simulation method and techniques proposed is capable to be utilized for collapse analysis of RC bridges. With simulation results of collapse analysis, failure modes and potential collapse mechanism of RC bridge under strong earthquake can be illustrated. A new double-deck viaduct with Y type pier was built in Shanghai recently. Its upper deck is urban arterial highway and the lower deck is urban light railway system. With the proposed simulation techniques, the response of this viaduct under earthquake was analyzed and the simulation results were verified by a pseudo-dynamic test with this bridge. With the analysis result, the seismic vulnerability of the double-deck viaduct was assessed and suggestion was proposed to improve the seismic
performance of bridge. Many high pier RC bridges are been constructed crossing deep valleys at mountain areas in the western China, where the geotechnical condition is more complicated and the earthquake is more active. To
verify the seismic response performance and to predict the damage mechanism of a high pier bridge under strong earthquake, a high pier RC at a typical mountain area was investigated as an example. The bridge is a multi-span continuous frame structure with high piers. Its deck consists of two parallel separate girders with curve. In this simulation, first, detail nonlinear analysis for bridge elements those
might be heavily damaged during earthquake were analyzed using advanced elasto-plastic constitutive model. Then, based on that, a simplified constitutive model were established for the collapse analysis of the whole bridge. The methodology and results of the simulation in this paper are expected to be helpful for the seismic design and analysis of RC bridge.
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