Open Access

ARTICLE

Anti-Crack Analysis and Reinforcement Design of Transverse Diaphragm Based on Layered Modeling Analysis Method

Yuanyin Song¹, Wenwei Wang^2,*
1 China Communications Construction Company Highway Bridges National Engineering Research Center Co., Ltd., Beijing, 100088, China
2 Department of Bridge Engineering, School of transportation, Southeast University, Nanjing, 211189, China
* Corresponding Author: Wenwei Wang. Email:
(This article belongs to the Special Issue: Health Monitoring and Rapid Evaluation of Infrastructures)

Structural Durability & Health Monitoring https://doi.org/10.32604/sdhm.2024.055382

Received 25 June 2024; Accepted 30 August 2024; Published online 04 December 2024

Abstract

To meticulously dissect the cracking issue in the transverse diaphragm concrete, situated at the anchor point of a colossal large-span, single cable plane cable-stayed bridge, this research paper adopts an innovative layered modeling analysis methodology for numerical simulations. The approach is structured into three distinct layers, each tailored to address specific aspects of the cracking phenomenon. The foundational first layer model operates under the assumption of linear elasticity, adhering to the Saint Venant principle. It narrows its focus to the crucial zone between the Bp20 transverse diaphragm and the central axis of pier 4’s support, encompassing the critically cracked diaphragm beneath the N1 cable anchor. This layer provides a preliminary estimate of potential cracking zones within the concrete, serving as a baseline for further analysis. The second layer model builds upon this foundation by incorporating material plasticity into its considerations. It pinpoints its investigation to the immediate vicinity of the cracked transverse diaphragm associated with the N1 cable, aiming to capture the intricate material behavior under stress. This layer’s predictions of crack locations and patterns exhibit a remarkable alignment with actual detection results, confirming its precision and reliability. The third and most intricate layer delves deep into the heart of the matter, examining the cracked transverse diaphragm precisely where the cable force attains its maximum intensity. By leveraging advanced extended finite element technology, this layer offers an unprecedented level of detail in tracing the progression of concrete cracks. Its findings reveal a close correlation between predicted and observed crack widths, validating the model’s proficiency in simulating real-world cracking dynamics. Crucially, the boundary conditions for each layer are meticulously aligned with those of the overarching model, ensuring consistency and integrity throughout the analysis. These results not only enrich our understanding of the cracking mechanisms but also underscore the efficacy of reinforcing cracked concrete sections with external steel plates. In conclusion, this study represents a significant contribution to the field of bridge engineering, offering both theoretical insights and practical solutions for addressing similar challenges.

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Keywords

Single-cable plane cable-stayed bridge; anti-crack checking analysis; cracked transverse diaphragm; steel plate strengthening; reinforcement design

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