Abstract: Although certain measurements regarding super-tall buildings constructed using the top-down method have been published, new advances in top-down construction have been developed with the construction of super-tall buildings in China. This paper presents the theory of soil-structure interactions in pile foundations and extends it to the top-down construction method. Based on this theo…
Abstract: The static and dynamic displacements of high-speed railway bridges, which are determined by the load conditions, travel speed, and span, may cause passenger discomfort when they are excessive. In the Korea Railway Bridge Design Specifications, the allowable deflection is based on the train travel speed. It is, however, not sufficient for considering the vibration serviceability. The …
Abstract: Masonry is the most important construction material in Turkey. It has been used for public and residential buildings in the past several thousand years. A great number of well-preserved old masonry structures still exist proving that this form of construction can successfully resist loads and environmental impact. Traditionally, most major buildings were solid walled structures with …
Abstract: Soil-bentonite slurry-trench wall, usually consisting of sandy soil and Na-bentonite, is used extensively as in-situ engineered barriers for contaminant containment. Clayey soil/Ca-bentonite may be considered as an alternative backfill when Na-bentonite is scarce at some sites. Adding trace amount of phosphate dispersant to clayey soil/Ca-bentonite backfills may be advantageous to ma…
Abstract A side orifice created in the side of a channel is a structure for diverting some of the flow from the main channel for different purposes. The prediction of the discharge through this side structure is very important in hydraulic and irrigation engineering. In the present study, three artificial neural network models including feed forward back propagation, radial basis function, and…
Abstract: Curve-section traffic accidents occur due to a mixture of vehicle, human, and road environmental factors. Traffic safety research in curve sections, however, so far has been confined to only investigating the effect of highway geometry factors on traffic accidents. Accordingly, this study suggested curved part safety-level evaluation criteria by complexly considering the hazard-level…
Abstract: In this paper, a Cochlea-inspired Artificial Filter Bank (CAFB) was developed in order to efficiently acquire dynamic response of structure, and it was also evaluated via dynamic response experiments. To sort out signals containing significant modal information from all the dynamic responses of structure, it was made to adopt a Band-pass filter Optimizing Algorithm (BOA) and a Peak- …
Abstract: This study proposes a 3D intelligent object model in highway construction to electronically represent a large amount information in highway projects based on the international standard ISO 10303. Also known as STEP (Standard for the Exchange of Product), ISO 10303 is an open standard, and has been used for data exchange in building projects of the AEC industries. Motivated by the suc…
Abstract: In recent years, Vietnam has many diseases such as measles, HFMD, chicken pox, and so on. Although there are many new hospital projects, the central hospitals of government still usually overload. Besides that, similar to other construction projects, the hospital projects in Vietnam always have lengthy delays. This research analyzed the factors that cause delay the time of hospital p…
Abstract: This study aims to investigate the ability of different least squares adjustment techniques for detecting deformation. A simulated geodetic netwo rk is used for this purpose. The observations are collected using the Total Station instrument in three epochs and different least squares adjustment methods are used to analyze the simulated network. The applied methods are adjustment-bye…
Abstract: A Project Management Information System (PMIS) is a key Information System (IS) tool used for the successful completion of construction projects and the achievement of organizational goals. This study investigated the effects of computer self-efficacy and IS quality (information, system, and service quality) on perceived net benefits of PMIS. The study used the updated DeLone and McL…
Abstract: The ogee-crested spillway is a passage in a dam through which the design flood could be disposed of safely to the downstream. Spillways of improper design or insufficient capacities have caused failures of dams. Therefore, the spillway must be hydraulically and structurally adequate. This paper presents Gene-Expression Programming (GEP) models as an alternative approach to prediction…
Abstract: Ultra-soft soils have high water content, low strength, and high compressibility. Staged preloading has been commonly used in China to improve ultra-soft soils during land reclamation before highways and other structures are constructed. In this study, seven series of one-dimensional consolidation tests were performed on undisturbed, remolded, or reconstituted specimens of three type…
Abstract: This paper seeks to understand the effect of acidic fluids on the compressibility of soil. Three natural soils (namely, Kansai clay, Yurakucho silt, and Oumigawa silt) containing kaolinite were leached with solutions of sulphuric acid for various lengths of time. At the end of each time interval, standard compression (oedometer) tests were performed to study the behavior of soil in a…
Abstract In this study Shortcut Biological Nitrogen Removal (SBNR), Granular Sequencing Batch Reactor (GSBR), and anaerobic ammonium oxidation (Anammox) were comparatively discussed for combined treatment of anaerobic digester effluent. The experiments were carried out through operating pilot and lab scale reactors. These processes have common ground that biologically removes high strength amm…
Abstract: Aluminum Alloy Gusset (AAG) joints widely used in the single-layer latticed shells have a significant application prospect in spatial structures. Unfortunately, studies on the resistance of AAG joints are insufficient, leading to a lack of applicative design methods for this joint system. This paper is devoted to investigate the resistance of AAG joint plates. Firstly, tests on fourt…
Abstract Blasting excavation disturbance is an important influencing factor related to the initiation and the evolution of the surrounding rock damage zone in deep-buried tunnels. Based on the excavation of auxiliary tunnels in the Jinping II Hydropower Station, the effect of blasting excavation disturbance on the surrounding rock damage zone in deep-buried tunnels is studied by means of in-si…
Abstract: In addition to the global awareness regarding green buildings, there is growing interest in Building Energy Load Calculation (BELC). The BELC process, however, has several potential problems, including the fact that the required data are input manually through subjective engineer choices and, during the BELC process, a designer must wait for feedback from the engineer regarding the B…
Abstract: Due to the presence of solid matter in the flow passing through sewer pipes, determining the minimum velocity that prevents sediment deposition is essential. In this study, the Multilayer Perceptron (MLP) network optimized with three different training algorithms, including variable learning rate (MLP-GDX), resilient back-propagation (MLP-RP) and Levenberg-Marquardt (MLPLM) is studie…
Abstract: The purpose of this study targets overseas gas plant construction projects with the aim of analyzing the probabilistic cost variation range with consideration of the effect of core quantitative risk factors. C-Project, which is expected to be completed by a domestic construction company in country U, was thus selected as the subject of analysis. By interviewing experts through survey…
Abstract: The theory of beam on elastic foundation is a simple and popular analytic approach for computing the response of laterally loaded piles. For a laterally loaded pile with constant subgrade reaction coefficient, an analytical solution can be easily deduced based on the theory of beam on elastic foundation when the load distribution and boundary condition are simple. However, when the …
Abstract: Parshall flumes are commonly used in irrigation systems, storm water systems, and sewer systems in order to measure the flow rate. The dissolved oxygen content in surface waters is a main indicator of the quality of that water for human use as well as use by the aquatic plant and animal life. A higher dissolved oxygen content supplies better water quality. Hydraulic structures can in…
Abstract: To quantitatively evaluate crack width of concrete structures surface, this paper presents a stereovision-based crack width detection method. Compared with the traditional visual inspection with single camera, this approach uses a pair of cameras to capture cracks images for recovering 3D coordinates of crack edge, and does not needs scale attached to concrete surface for converting …
Abstract: Online sensors in water distribution networks primarily serves two purposes: (1) Assures quality of water delivered to consumers;(2) Early detection of contamination events so as to minimize its consequences. Most of the multi-objective techniques consider thesecond purpose and almost ignore the first purpose. In this study, a sensor placement problem is formulated to cover these two…
Abstract: With developments and innovations in technology, new materials and methods have enabled architects and engineers to plan and construct large-scale facilities. However, these developments may also result in serious problems which include budget overruns, completion delays and distress on the part of the facility owner. To avoid these problems, many types of delivery systems which cont…
Abstract: In this paper, the rotational behavior of asymmetric base-isolated buildings is compared with the similar asymmetric fixed-base buildings. A vast range of lead rubber bearings with different periods is considered to evaluate the effect of the isolation degree on seismic responses of the structures. The simulation results confirm that the base isolators are able to reduce rotation of …
Abstract: Storage dams play a very important role in irrigation especially during lean periods. For proper regulation one should make sure theavailability of water according to needs and requirements. Normally regression techniques are used for the estimation of a reservoirlevel but this study was aimed to account for a non-linear change and variability of natural data by using Gamma Test, for…