Showing papers in "Engineering Structures in 2011"

TL;DR: In this article, a comparison between multiple linear regression (MLR) and artificial neural network (NN) models for the characterization of dam behavior under environment loads is made. And the results show that NN models can be a powerful tool to be included in assessments of existing concrete dam behaviour.

TL;DR: In this paper, a probabilistic and reliability-based approach was described to predict the probability of corrosion initiation and damage for concrete infrastructure subjected to carbonation and chloride-induced corrosion resulting from elevated CO2 levels and temperatures.

TL;DR: In this article, signal analysis techniques (supervised-type learning filter in combination with a Chebyshev filter) constrained and tested by independent accelerometer data were used to process noisy GPS measurements of oscillations of 40 m long steel footbridge excited by coordinated jumps of a group of people.

TL;DR: In this article, the effect of aftershocks in steel framed buildings was evaluated in terms of the peak and residual drift demands at the end of the earthquake's excitation, and it was shown that artificial seismic sequences could significantly overestimate median peak and drift demands as well as the record-to-record variability.

TL;DR: In this article, the optimum parameters of tuned mass dampers (TMD) are proposed under seismic excitations, and a Matlab program is developed for numerical optimization and time domain simulation.

TL;DR: In this article, the authors presented a comprehensive model of chloride penetration where the governing equations are solved by coupling finite element and finite difference methods, and uncertainties related to the problem are also considered by using random variables to represent the model's parameters and the materials' properties, and stochastic processes to model environmental actions.

TL;DR: In this article, the authors discuss the implications of ductility in the design of timber structures under static and dynamic loading including earthquakes, and illustrate the use of the elastic-perfectly plastic analysis with ductility control for a simple statically indeterminate structure and compares this approach to the fully non-linear analysis and with the more traditional linear elastic analysis.

TL;DR: A half-scale interior beam-column connection incorporating superelastic nickel-titanium shape memory alloy (SMA) tendons was designed, fabricated, and tested to assess the feasibility of such a connection in a moment-resisting frame as discussed by the authors.

TL;DR: In this article, the structural response of multi-story structures to near-fault ground motions, and whether structural response is dominated by the ground motion pulses present in forward-directivity ground motions were investigated.

TL;DR: In this article, a series of tests on one-way spanning simply supported reinforced concrete (RC) slabs which have been strengthened in flexure with tension face bonded FRP composites and anchored with different arrangements of FRP anchors are presented.

TL;DR: In this paper, a numerical study on two reinforced concrete (RC) frame structures demonstrates that the current tie force (TF) method is inadequate in increasing the progressive collapse resistance and the fundamental principles inherent in the current TF method are examined in some detail.

TL;DR: In this paper, the pultruded carbon fiber-reinforced polymer (CFRP) plates were tested at steady and transient states for temperatures ranging from approximately 20 to 700°C.

TL;DR: In this paper, a technique termed "pushdown analysis" is proposed to investigate the robustness of building systems by computing residual capacity and establishing collapse modes of a damaged structure, which is inspired by the pushover method commonly used in earthquake engineering, and three variants of the technique are suggested and exercised using nonlinear analysis on 10-story steel moment frames designed for moderate and high levels of seismic risk.

TL;DR: In this article, the authors discuss the seismic design of multi-storey buildings made from cross-laminated timber panels (crosslam) and discuss the use of seismic analysis methods such as the modal response spectrum and the non-linear static (pushover) analysis.

TL;DR: In this article, the authors investigated the vortex-induced vibration of a twin steel box girder suspension bridge with a center span of 1650 m based on field measurements, and they found that the vortex shedding more likely occurs in a low wind speed range of 6-10m/s, with the wind direction nearly perpendicular to the bridge line, and low turbulence intensity.

TL;DR: In this paper, an experimental program was conducted to investigate the in-plane seismic behavior of steel frames with clay brick masonry infills having openings, and the results indicated that infill panels with openings are not always more ductile than the ones with solid infill.

TL;DR: In this paper, the applicability of some major concrete design standards and other pertinent methods to calculate the concrete contribution to the shear resistance of reinforced recycled concrete (RRC) beams without stirrups is investigated.

TL;DR: In this article, the influence of fibers on flexural behavior and ductility of concrete beams reinforced with GFRP bars was studied and it was found that the span-to-experimental service load deflection ratio is relatively high when compared to the usually accepted ratio of about span/250.

TL;DR: In this paper, a series of steel plate shear walls are designed and their behavior is evaluated using nonlinear response history analysis for ground motions representing different hazard levels and it is found that designs meeting current code requirements satisfy maximum inter story drift requirements considering design level earthquakes and have maximum interstory drifts of less than 5% for maximum considered earthquakes.

TL;DR: In this article, a 3D finite element numerical analysis of the sensor, packaging and adhesive used to fix the system to the host structure was conducted to study the influence of the thickness and mechanical properties of the adhesive, and the configuration of the packaging on the accuracy of the sensors.

TL;DR: In this paper, the flexural behavior of damaged steel beams repaired with carbon fiber reinforced polymer (CFRP) strips is analyzed and a three-dimensional finite element analysis (FEA) is conducted to predict the experimental behavior.

TL;DR: In this paper, the authors present nonlinear dynamic analysis results and evaluate performance of BRBF and BRBF-SMRF systems using moment-resisting and non-momentresisting beam-column connections within the BRBF.

TL;DR: In this article, the complex variable element-free Galerkin (CVEFG) method for two-dimensional elasto-plasticity problems is presented, which is an approximation method for a vector function.

TL;DR: In this paper, a new model that can simulate the shear behavior of reinforced concrete connections in structures subjected to seismic loads is proposed, which uses limiting principal tensile stress in the joint as the failure criteria so that due consideration is given to the axial load on the column.

TL;DR: In this paper, a beam-on-nonlinear-Winkler-foundation (BNWF) approach was used to model the nonlinear soil-structure interaction behavior.

TL;DR: In this paper, the use of minimum timber dimensions and minimum spacing and distances of fasteners often leads to timber splitting in the connection area, which can be prevented by reinforcing the timber in connection area perpendicular to the grain or using cross-laminated timber members.

TL;DR: In this paper, a structural health monitoring (SHM) system consisting of over 800 sensors has been implemented to the Guangzhou New TV Tower (GNTVT) for both in-construction and in-service real-time monitoring.

TL;DR: In this article, the influence of steel fiber on the workability of fresh self-consolidating concrete (SCC) beams was investigated, and the experimental results carried out on a series of simply supported SCC rectangular beams, using steel fiber reinforcement with and without stirrups, and subjected to four-point symmetrically placed vertical loads.

TL;DR: In this paper, the long-term fatigue analysis of welded multi-planar tubular joints for a fixed jacket offshore wind turbine designed for a North Sea site in a water depth of 70 m is performed.

TL;DR: In this article, the effect of earthquake frequency content on the seismic behavior of fluid rectangular tank system is investigated using four different seismic motions, including longitudinal, transversal and vertical ground motions.