Nonlinear Finite Element Analysis of Bonding Behavior of Corroded Mortar Anchor under Dynamic Load

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2022-10-28 DOI:10.56748/ejse.223273

Haitao Wang, Minghua Cui, Kun Ren, Haoyu Sun

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引用次数: 0

Abstract

The connection between reinforcement and mortar was established through the surface-to-surface contact method. The transient dynamic Full method was adopted for dynamic loading solution. The numerical analysis model for the bonding performance of corroded mortar bolts under dynamic load was established. The numerical analysis results were compared with the test results for verification. The bond properties of the anchorage interface under the conditions of different mortar protection thickness, anchorage length and corrosion rate were analyzed. The results show that the numerical simulation results are in good agreement with the test results. The numerical model can analyze the bonding performance of the corroded mortar bolts. Within a certain limit, the bond stress is positively correlated with the thickness of the mortar protective layer.The larger the anchorage length is, the greater the bonding stress at the loading end will be, and the more uneven the distribution of bonding stress in the anchorage segment will be. However, when the anchorage length reaches a certain value, the continuous increase of anchorage length will have no obvious effect on the improvement of its bonding performance, so there is an optimal anchorage length. With the increase of the corrosion ratio, the bonding stress peck decreased gradually.

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动荷载作用下腐蚀砂浆锚杆粘结性能的非线性有限元分析

钢筋和砂浆之间的连接是通过表面接触法建立的。采用瞬态动力全法求解动态载荷。建立了受腐蚀砂浆锚杆在动载荷作用下粘结性能的数值分析模型。将数值分析结果与试验结果进行对比验证。分析了不同砂浆保护厚度、锚固长度和腐蚀速率条件下锚固界面的粘结性能。结果表明，数值模拟结果与试验结果吻合较好。该数值模型可以分析锈蚀砂浆锚杆的粘结性能。在一定范围内，粘结应力与砂浆保护层厚度呈正相关。锚固长度越大，加载端的粘结应力越大，锚固段内粘结应力分布越不均匀。然而，当锚固长度达到一定值时，锚固长度的持续增加对其粘结性能的提高没有明显影响，因此存在一个最优锚固长度。随着腐蚀率的增加，结合应力peck逐渐减小。

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来源期刊

Electronic Journal of Structural Engineering Engineering-Civil and Structural Engineering

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The Electronic Journal of Structural Engineering (EJSE) is an international forum for the dissemination and discussion of leading edge research and practical applications in Structural Engineering. It comprises peer-reviewed technical papers, discussions and comments, and also news about conferences, workshops etc. in Structural Engineering. Original papers are invited from individuals involved in the field of structural engineering and construction. The areas of special interests include the following, but are not limited to: Analytical and design methods Bridges and High-rise Buildings Case studies and failure investigation Innovations in design and new technology New Construction Materials Performance of Structures Prefabrication Technology Repairs, Strengthening, and Maintenance Stability and Scaffolding Engineering Soil-structure interaction Standards and Codes of Practice Structural and solid mechanics Structural Safety and Reliability Testing Technologies Vibration, impact and structural dynamics Wind and earthquake engineering. EJSE is seeking original papers (research or state-of the art reviews) of the highest quality for consideration for publication. The papers will be published within 3 to 6 months. The papers are expected to make a significant contribution to the research and development activities of the academic and professional engineering community.