Review of available systems and materials for splicing prestressed-precast concrete piles

Dolati, Seyed Saman Khedmatgozar; Mehrabi, Armin

doi:10.1016/j.istruc.2021.01.029

Cited by 33 publications

(25 citation statements)

References 22 publications

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“…could dominate the design of the arch. Moreover, such other issues, including instability of spandrel column for concrete deck arch bridges [38], strength of hangers for through arch bridge, local buckling instability etc. should be considered during the design of a real arch bridge.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Theoretical Analysis of Ultimate Main Span Length for Arch Bridge

Zhang¹,

Deng

Fang

et al. 2022

Sustainability

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The advancement of construction techniques and high-performance sustainable materials enables the increase of span length for arch bridge. It is of great importance to study the theoretical ultimate span length of arch bridge. Based on the parabolic and catenary arch axes, the analytical solutions of ultimate span length of arch bridge are solved using theoretical derivation accounting for the strength, in-plane stability and out-plane stability conditions, respectively. Then, the use of high-performance concrete, reactive powder concrete and high-strength steel is considered to study the relationship between theoretical ultimate span length and rise-span ratio as well as material strength for concrete and steel arch bridges. The results show that the theoretical ultimate span length derived by catenary arch axis is smaller by about 2–6% than that obtained by parabolic arch axis, but the difference is insignificant. When the rise-span ratio is 1/5, the theoretical ultimate span length for concrete arch bridge using R200 reactive powder concrete can reach 2000 m (2161 m for catenary arch axis and 2099 m for parabolic arch axis) while the main span of steel arch bridge using Q690 high-strength steel can be longer than 2500 m (2948 m for catenary arch axis and 2865 m for parabolic arch axis).

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Section: Conclusion and Discussionmentioning

confidence: 99%

Theoretical Analysis of Ultimate Main Span Length for Arch Bridge

Zhang¹,

Deng

Fang

et al. 2022

Sustainability

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“…But the construction process of CIDH piles obviously does not meet the development requirements of green, low-carbon and efficient construction techniques. Compared with CIDH piles, PPCPs conform to the modern construction concept in building industry and are a practical, efficient and economical option for pile foundations in soft soil areas under a variety of engineering environments and geological conditions [4]. Thus, as a main type of PPCPs, development of suitable PHC piles for application in seismic regions remains to be an important topic.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Ren

Chen

et al. 2023

Structures

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“…One of the options for creating a relatively stronger and durable pile foundation is to drive prestressed-precast concrete piles. This type of piles is widely used in viaducts (Dolati and Mehrabi, 2021a, 2021b, 2022). In addition to pre-compressing the concrete to avoid cracking, the strands also provide the additional strength to resist the bending moment resulting from lateral loads (Mehrabi and Dolati, 2020, 2022).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional numerical analyses of pile responses to tunneling-induced ground movements in bilayer soil

Houhou

Amari

Belounar³

2022

WJE

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Purpose This paper aims to investigate the responses of single piles and pile groups due to tunneling-induced ground movements in a two-layered soil system. The analyses mainly focus on the additional single pile responses in terms of bending moment, lateral deflection, axial force, shaft resistance and pile settlement. Subsequently, a series of parametric studies were carried out to better understand the responses of single piles induced by tunneling. To give further understanding regarding the pile groups, a 2 × 2 pile group with two different pile head conditions, namely, free and capped, was considered. Design/methodology/approach Using the PLAXIS three-dimensional (3D) software, a full 3D numerical modeling is performed to investigate the effects of ground movements caused by tunneling on adjacent pile foundations. The numerical model was validated using centrifuge test data found in the literature. The relevance of the 3D model is also judged by comparison with the 2D plane strain model using the PLAXIS 2D code. Findings The numerical test results reveal that tunneling induces significant displacements and internal forces in nearby piles. The magnitude and distribution of internal forces depend mainly on the position of the pile toe relative to the tunnel depth and the distance between the pile and the vertical axis of the tunnel. As the volume loss increases from 1% to 3%, the apparent loss of pile capacity increases from 11% to 20%. By increasing the pile length from 0.5 to 1.5 times, the tunnel depth, the maximum pile settlement and lateral deflection decrease by about 63% and 18%, respectively. On the other hand, the maximum bending moment and axial load increase by about 7 and 13 times, respectively. When the pile is located at a distance of 2.5 times the tunnel diameter (Dt), the additional pile responses become insignificant. It was found that an increase in tunnel depth from 1.5Dt to 2.5Dt (with a pile length of 3Dt) increases the maximum lateral deflection by about 420%. Regarding the interaction between tunneling and group of piles, a positive group effect was observed with a significant reduction of the internal forces in rear piles. The maximum bending moment of the front piles was found to be higher than that of the rear piles by about 47%. Originality/value Soil is a complex material that shows differently in primary loading, unloading and reloading with stress-dependent stiffness. This general behavior was not possibly being accounted for in simple elastic perfectly plastic Mohr–Coulomb model which is often used to predict the behavior of soils. Thus, in the present study, the more advanced hardening soil model with small-strain stiffness (HSsmall) is used to model the non-linear stress–strain soil behavior. Moreover, unlike previous studies THAT are usually based on the assumption that the soil is homogeneous and using numerical methods by decoupled loadings under plane strain conditions; in this study, the pile responses have been exhaustively investigated in a two-layered soil system using a fully coupled 3D numerical analysis that takes into account the real interactions between tunneling and pile foundations. The paper presents a distinctive set of findings and insights that provide valuable guidance for the design and construction of shield tunnels passing through pile foundations.

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Review of available systems and materials for splicing prestressed-precast concrete piles

Cited by 33 publications

References 22 publications

Theoretical Analysis of Ultimate Main Span Length for Arch Bridge

Theoretical Analysis of Ultimate Main Span Length for Arch Bridge

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Three-dimensional numerical analyses of pile responses to tunneling-induced ground movements in bilayer soil

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