Abstract: The utility model discloses a diaphram wall wharf pile foundation structure. The diaphram wall wharf pile foundation structure is characterized in that T-shaped unit piles are used as main structural units to form an enclosed diaphram wall wharf pile foundation, and are provided with T-shaped cross sections. The foundation structure fully utilizes the characteristic of the T-shaped sections that when the sectional areas are equal, the outer surface areas and sectional anti-bending coefficients of the T-shaped sections are larger than those of round or square sections, so as to increase the friction areas and structural rigidities of the pile bodies and the soil body, further shorten the pile length of the wharf foundation, reduce the number of the piles, improve the vertical bearing capability and horizontal rigidity of a wharf structure, and achieve the aim that the sedimentation transformation and horizontal replacement of a wharf can be effectively controlled.

Abstract: The authors acknowledge the financial support for Project Masonry from the New Zealand Natural Hazards Research Platform. The testing of adhesive anchors was undertaken in conjunction with the RAPID grant CMMI-1138614 from the US National Science Foundation. The investigation of the performance of residential brick veneers was financially supported by Brickworks Building Products Australia.

Abstract: This paper received a manuscript prize award for the best research paper on Sustainable Real Estate (sponsored by the NAIOP Research Foundation) presented at the 2010 ARES Annual Meeting.Increasing...

Abstract: Fully drained, load-controlled laboratory model tests and their numerical simulations are presented. The tests were performed on adequately instrumented, small scale physical models of floating stone column group foundations placed in slurry deposited clayey soil beds with known effective stress states. Effect of various group foundation parameters, such as area ratio, length of columns, relative density, and moisture content of the column material is evaluated. The numerical analyses consist of three-dimensional, elastoplastic, finite-element analyses of the model foundation. In the analyses, the clayey soil behavior is represented by the modified Cam-clay model, and the stone column and mat are represented by the elastic, fully plastic Mohr-Coulomb constitutive relationship. The finite-element analysis was successful in predicting the model test results with reasonable accuracy. The results are presented in nondimensional form. The major foundation parameters affecting the group response were identified...

Abstract: A number of potential offshore wind turbines in China will be constructed in sandy silt seabeds, and the mono-caisson foundation is an important choice for these offshore wind turbines. A program o...

Abstract: This study illustrates design optimization for multiple wind towers located at different villages in Alaska. The towers are supported by two different types of foundations: large mat or deep piles foundations. Initially, a reinforced concrete (RC) mat foundation was proposed. Where soil conditions required it, a pile foundation solution was devised utilizing a 30 in thick RC mat containing an embedded steel grillage of W18 beams and supported by 20–24 in grouted or un-grouted piles. For faster installation and lower construction cost, all-steel foundations were proposed for these remote Alaska sites. The new all-steel design was found to reduce the natural frequencies of the structural system due to softening the foundation. Thus, the tower–foundation system could potentially become near-resonant with the operational frequencies of the wind turbine. Consequently, the likelihood of structural damage or even the collapse is increased. A detailed 3D finite-element model of the tower–foundation–pile system with RC foundation was created using SAP2000. Soil springs were included in the model based on soil properties obtained from the geotechnical investigation. The natural frequency from the model was verified against the tower manufacturer analytical and experimental values. When piles were used, numerous iterations were carried out to eliminate the need for the RC and optimize the design. An optimized design was achieved with enough separation between the natural and operational frequencies. The design successfully avoids damage to the structural system, while eliminating the need for any RC in most cases.

Abstract: Design and Development of a Testing Device for Experimental Measurements of Foundation Slabs on the Subsoil The paper deals with technical solutions and construction of a testing stand designed for experimental measurements of deformations and state of stress of foundation structures placed on the subsoil. The designed structural system, the analysis of internal forces and the range of maximal loading during experiments are described in detail. The testing stand was constructed in 2010 at the Faculty of Civil Engineering, VSB-TU Ostrava. The testing stand was ready for start of experiments at the end of 2010. Návrh a Vývoj Zkušebního Zarízení pro Experimentální Měření Základových Desek na Podloží Článek pojednává o technickém řešení a výstavbě zkušebního zařízení, tzv. standu, pro experimentální měření přetvoření a napjatosti základových konstrukcí na podloží. Podrobně je popsán navržený konstrukční systém, analýza vnitřních sil a rozsah možného zatížení při experimentálních zkouškách. Výstavba zkušebního standu v areálu Fakulty stavební VŠB-TU Ostrava byla realizována v roce 2010 a v závěru roku bylo zařízení připraveno k zahájení experimentálních zkoušek.

Abstract: MIT Concrete Sustainability Hub research is supported by the Portland Cement Association and the Ready Mixed Concrete Research and Education Foundation.

Abstract: MIT Concrete Sustainability Hub research is supported by the Portland Cement Association and the Ready Mixed Concrete Research and Education Foundation.

Abstract: Mathematics Applications Consortium for Science and Industry (www. macsi.ul.ie) funded by the Science Foundation Ireland mathematics initiative grant 06/MI/005. A.C.F. and C.D.C. acknowledge the support of NERC grant NE/D013070/1.

Abstract: ii To my teachers and mentors iii ACKNOWLEDGMENTS I am extremely grateful to Professor Jasbir their direct support of this work. Professor Jasbir S. Arora not only provided me with the theoretical knowledge of optimization, upon which this work is based, but supported me in obtaining the technical wind turbine tower and foundation design knowledge I would need to bring this work to fruition. Specifically, he invited an expert in the field, Dr. Marcelo Silva, to speak at the University of Iowa and he provided financial support for me to attend a two-day intensive training course on wind turbine tower and foundation system design in Austin Texas. Additionally, Professor Arora's gentle pushing continues to challenge me to be a better student and researcher. As members of my thesis committee and experts in the field of structural engineering, Professors Colby Swan and Asghar Bhatti have been crucial in helping me to ensure that the methodologies and assumptions used in this research are valid. Also, I am very thankful for the time they have taken to review my thesis and provide suggestions to improve it. Their efforts add a great deal to this research and challenge me to think about my research more critically. Dr. Marcelo Silva is thanked for his time and effort in traveling to the University of Iowa, introducing me to the topic of optimization of wind turbine support structures, and suggesting the idea of considering the optimal design of an integral wind turbine tower and foundation system. Provost Barry Butler is thanked for his interest in and feedback on this research throughout the project. Particularly, I am thankful for his efforts to help me partner with those in industry and his insights into the direction of the wind industry. I am thankful and indebted to Dr. Tim Marler for his consistent support of my research and his understanding in allowing me to take the time needed to complete this thesis. iv ABSTRACT A renewed commitment in the United States and abroad to electricity from renewable resources, such as wind, along with the recent deployment of very large turbines that rise to new heights, makes obtaining the most efficient and safe designs of the structures that support them ever more important. Towards this goal, the present research seeks to understand how optimization concepts and Microsoft Excel's optimization capabilities can be used in the design of wind turbine towers and …

Abstract: Construction on expansive soils is challenging and thus prone to some problems and litigation. The engineering community makes extensive use of local experience and empirical procedures to address these problems. Although there has been extensive study of expansive soils and foundations on expansive soils, data related to performance of residential structures are limited in general and limited in the Phoenix area, in particular. In this study, an overview of the Phoenix Valley, Arizona, geotechnical practice and foundation performance related to residential structures on expansive clays, was developed through surveys and interviews with geotechnical engineers, structural engineers, and homebuilders. Using data obtained from files of Phoenix area geotechnical firms and government agencies, the existing Natural Resource Conservation Service map showing expansive soil locations throughout the Phoenix region was updated through the use of correlation developed in this study relating expansion index to common soil index properties such as Atterberg limits and percent passing the No. 200 sieve. Files of forensic investigations linked to expansive soil regions were made available for this study by several geotechnical engineering firms, and Phoenix Valley areas where forensic investigations have been identified, were mapped for comparison to regions identified in the updated map as having expansive soils. Comparison of the forensic investigation map to the updated map of expansive clay locations revealed that most of the forensic investigations were in regions identified with clays labeled as high to moderately high expansion potential, with a few forensic investigations in regions of medium expansion potential. Finally, unsaturated flow analyses were conducted for an Arizona expansive clay profile for two very different landscaped conditions of well-irrigated turf and desert landscape. The results of the numerical analyses were consistent with the reported observations and modes of failure identified through the surveys and interviews conducted with engineering and homebuilder professionals, including the finding that site drainage was found to be extremely important to good foundation performance, regardless of the type of landscape selected.

Abstract: Offshore structures for oil and gas exploitation are designed to accommodate severe environments with large cyclic loads. These structures are either founded directly on the seabed, or they are moored to anchors installed in the seabed soil. The permanent and cyclic loading, the foundation or anchor geometry, and the nonlinear soil behavior may be very complex, and many interrelated aspects must be considered in the geotechnical design of the foundations. Finite-element analyses (FEAs) are used increasingly to deal with these complexities and offer the potential to increase accuracy, efficiency, and reliability and reduce the uncertainty of the design process. This paper presents the major geotechnical aspects in the design of foundations for offshore structures and examples from finite-element analyses carried out at the Norwegian Geotechnical Institute (NGI) to deal with these aspects. A brief review of the procedure used at NGI to obtain soil stress-strain-strength relationships from cyclic laboratory ...

Abstract: Ministry of Communications issued《Code for Design of Ground Base and Foundation of Highway Bridges and Culverts》(JTG D63 — 2007),which was emended and perfected on the basis of 《Code for Design of Ground Base and Foundation of Highway Bridges and Culverts》(JTJ 024 — 85).The paper discussed interrelated update and innovation.At the same time,the author put some suggestions and opinions for problem existed in the new criterion.The purpose is betterly perfect new criterion.

Abstract: If utilized, the energy dissipative capability of seismically loaded shallow foundations due to inelastic behavior can result in more economic design, provided the consequences, such as excessive deformations are accounted for. In this article, a Beam-on-Nonlinear-Winkler-Foundation (BNWF) model is used to assess the performance of shearwall-foundation systems with different attributes, when subjected to ground motions of varied hazard levels. The numerical study indicates that the force and drift demands to the shearwall reduce significantly, when nonlinear foundation behavior is realized, while permanent settlement is well below the permissible limit. These results support the concept of shallow foundation capacity mobilization in future design. Copyright © 2010 John Wiley & Sons, Ltd.

Abstract: Steel-concrete composite systems for buildings are formed by connecting the steel beam to the concrete slab or profiled deck slab with the help of mechanical shear connectors so that they act as a single unit. In the present work, steel- concrete composite, steel and R.C.C. options are considered for comparative study of G+30 storey commercial building which is situated in earthquake zone IV. Equivalent Static Method of Analysis is used. For modeling of Composite, Steel and R.C.C. structures, ETABS software is used and the results are compared; and it is found that composite structure is found to be more economical. Index Term--Composite beam, Composite column, Shear connector, ETAB software. I. INTRODUCTION & OBJECTIVE teel-concrete composite systems have become quite popular in recent times because of their advantages against conventional construction. Composite construction combines the better properties of the both i.e. concrete and steel and results in speedy construction. In the present work included Comparative study of R.C.C., STEEL and COMPOSITE (G+30 STORY) building. In the comparative study includes deflections of the members, size and material consumption of members in composite with respect to R.C.C. and Steel sections, seismic forces and behavior of the building under seismic condition in composite with respect to R.C.C. and Steel, foundation requirements and type of foundation can be selected for Composite structure with respect to R.C.C. and Steel and total cost of the building.