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RISLong-Term Monitoring of Temperature Differences in a Steel Truss Bridge with Two-Layer Decks Compared with Bridge Codes: Case Study
Publisher: ASCE
Abstract: Bridge structures are subjected to environmental thermal actions, which cause a complex temperature field in bridge structures. This research carried out long-term monitoring of temperature differences in a steel truss ...
Bayesian Updating of Nonlinear Constitutive Models for Steel–Concrete Composite Girder Bridges Using Large-Scale Load Test Data
Publisher: American Society of Civil Engineers
Abstract: Establishing an accurate finite-element (FE) model that faithfully replicates the nonlinear behavior of steel–concrete composite girder bridges is crucially important for effective model-based structural health monitoring ...
Individual Mathematical Modeling and Correction Based on a Combined Structure for Aircraft Engine
Publisher: American Society of Civil Engineers
Abstract: A combined structure for autoupdating rotating component characteristic maps is proposed for an individual aeroengine model. The designed combined structure, known as the Newton–Raphson (NR)-particle swarm optimization ...
Comparing the Effects of NH4H2PO4 and Na3PO4 on the Properties of Hardened Portland Cement Paste
Publisher: American Society of Civil Engineers
Abstract: Phosphates are a commonly used class of inorganic retarders for portland cement. Normally, previous studies focused on the effects of phosphates on the early hydration of cement paste. In this study, the effects of NH4H2PO4 ...
Lessons Learned from Construction of Shanghai Metro Stations: Importance of Quick Excavation, Prompt Propping, Timely Casting, and Segmented Construction
Publisher: American Society of Civil Engineers
Abstract: Four metro stations with similar supporting systems and pit geometries in Shanghai soft clay were excavated using different soil removal procedures, which led to distinctly different pit behaviors. Through analyzing and ...
Spatial Corner Effects of Long and Narrow Multipropped Deep Excavations in Shanghai Soft Clay
Publisher: American Society of Civil Engineers
Abstract: By analyzing the field data from nine metro-station pits with aspect ratios (AR) of pit length to width of 6.6–19.4 in Shanghai soft clay, this paper investigates the potential corner effects (i.e., the retaining walls ...
Experimental and Analytical Investigation of D-Type Self-Centering Steel Eccentrically Braced Frames with Replaceable Hysteretic Damping Devices
Publisher: American Society of Civil Engineers
Abstract: This paper presents the results of an experimental investigation of D-type self-centering eccentrically braced frames (SCEBF) subjected to cyclic loading. Analytical formulation of the SCEBF module frame’s load-displacement ...
Double Scalar Variables Plastic-Damage Model for Concrete
Publisher: ASCE
Abstract: A framework of the plastic-damage model with double scalar variables is established in nominal stress space under the small deformation assumption. In the damaged part, a damage tensor composed of double scalar variables ...
Static–Dynamic Combined Multiaxial Strength Criterion for Concrete
Publisher: ASCE
Abstract: The physical mechanism of the static–dynamic combined (S–DC) multiaxial strength of concrete is investigated considering cohesive and frictional strength. It is determined that the strain rate effects and stress state ...
Rates of Natural Subsidence along the Texas Coast Derived from GPS and Tide Gauge Measurements (1904–2020)
Publisher: ASCE
Abstract: This study investigated the rate of natural subsidence along the Texas coast using multidecadal to century tide gauge (TG) and global positioning system (GPS) data sets. The rates of land subsidence and sea level rise are ...