Shengzhe Wang - Academia.edu (original) (raw)
Reports by Shengzhe Wang
Report submitted to Earthquake Commission Research Foundation (Project No. UNI/578), 206 pp, doi: 10.13140/2.1.1168.5448, 2013
A great deal of knowledge about the performance of structural systems, such as bridges, can be cr... more A great deal of knowledge about the performance of structural systems, such as bridges, can be created using full-scale, in-situ experimentation on existing structures. Full-scale testing offers several advantages as it is free from many assumptions and simplifications inherently present in laboratory experiments and numerical simulations. For example, soil-structure interaction, non-structural components, and nonlinearities in stiffness and energy dissipation are always present in their true form in full-scale, in-situ testing. Thus, full-scale experimentation results present the ground truth about structural performance and indeed provide the ultimate test for both actual constructed systems and laboratory and numerical investigations. The performance evaluated this way can be used for advanced assessment of structural condition, detection of damage, aging and deterioration, evaluation of the construction quality, validation of design assumptions, and also as lessons for future de...
Papers by Shengzhe Wang
Soil Dynamics and Earthquake Engineering, 2014
ABSTRACT Raked piles are believed to behave better than vertical piles in a laterally flowing liq... more ABSTRACT Raked piles are believed to behave better than vertical piles in a laterally flowing liquefied ground. This paper aims at numerically simulating the response of raked pile foundations in liquefying ground through nonlinear finite element analysis. For this purpose, the OpenSees computer package was used. A range of sources have been adopted in the definition of model components whose validity is assessed against case studies presented in literature. Experimental and analytical data confirmed that the backbone force density–displacement (p–y) curve simulating lateral pile response is of acceptable credibility for both vertical and raked piles. A parametric investigation on fixed-head piles subject to lateral spreading concluded that piles exhibiting positive inclination impart lower moment demands at the head while those inclined negatively perform better at liquefaction boundaries (relative to vertical piles). Further studies reveal substantial axial demand imposed upon negatively inclined members due to the transfer of gravity and ground-induced lateral forces axially down the pile. Extra care must be taken in the design of such members in soils susceptible to lateral spreading such that compressive failure (i.e. pile buckling) is avoided.
Report submitted to Earthquake Commission Research Foundation (Project No. UNI/578), 206 pp, doi: 10.13140/2.1.1168.5448, 2013
A great deal of knowledge about the performance of structural systems, such as bridges, can be cr... more A great deal of knowledge about the performance of structural systems, such as bridges, can be created using full-scale, in-situ experimentation on existing structures. Full-scale testing offers several advantages as it is free from many assumptions and simplifications inherently present in laboratory experiments and numerical simulations. For example, soil-structure interaction, non-structural components, and nonlinearities in stiffness and energy dissipation are always present in their true form in full-scale, in-situ testing. Thus, full-scale experimentation results present the ground truth about structural performance and indeed provide the ultimate test for both actual constructed systems and laboratory and numerical investigations. The performance evaluated this way can be used for advanced assessment of structural condition, detection of damage, aging and deterioration, evaluation of the construction quality, validation of design assumptions, and also as lessons for future de...
Soil Dynamics and Earthquake Engineering, 2014
ABSTRACT Raked piles are believed to behave better than vertical piles in a laterally flowing liq... more ABSTRACT Raked piles are believed to behave better than vertical piles in a laterally flowing liquefied ground. This paper aims at numerically simulating the response of raked pile foundations in liquefying ground through nonlinear finite element analysis. For this purpose, the OpenSees computer package was used. A range of sources have been adopted in the definition of model components whose validity is assessed against case studies presented in literature. Experimental and analytical data confirmed that the backbone force density–displacement (p–y) curve simulating lateral pile response is of acceptable credibility for both vertical and raked piles. A parametric investigation on fixed-head piles subject to lateral spreading concluded that piles exhibiting positive inclination impart lower moment demands at the head while those inclined negatively perform better at liquefaction boundaries (relative to vertical piles). Further studies reveal substantial axial demand imposed upon negatively inclined members due to the transfer of gravity and ground-induced lateral forces axially down the pile. Extra care must be taken in the design of such members in soils susceptible to lateral spreading such that compressive failure (i.e. pile buckling) is avoided.