Research on the cause and control of cracks in reinforced concrete based on stress analysis

2014 ◽  
pp. 77-84 ◽  
1972 ◽  
Vol 98 (4) ◽  
pp. 885-898
Author(s):  
Somasundaram Valliappan ◽  
Terry F. Doolan

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Fudi Liang ◽  
Zengyou Liang ◽  
Dezhi Deng

When a projectile penetrates a target at high speed, the charge loaded inside the projectile usually bears a high overload, which will consequently severely affect its performance. In order to reduce the overload of the charge during the penetration process, the structure of the projectile was improved by adding two buffers at both ends of the charge. In this study, the mathematical expressions were first gained about the axial buffering force generated by the thin-walled metal tube, aluminum foam, and the composite structure of aluminum foam-filled thin-walled metal tube when they were impacted by the high-speed mass block through reasonable assumptions and stress analysis. During the experiment on the high-speed projectile penetrating reinforced concrete target, the acceleration curve of the charge and the projectile body were obtained. The results show that the maximum overload that the charge was subjected to during the launch and penetration process was significantly reduced, and the change in overload, which the charge was subjected to during the penetration process, was also less obvious.


2012 ◽  
Vol 256-259 ◽  
pp. 1082-1086
Author(s):  
Jun Zhang ◽  
Xie Dong Zhang ◽  
Xiang Yu Hu

The damages of reinforced concrete pipe culvert appeared in use process brought a lot of problems. Investigated the pipe culvert damage characteristics, analyzed the causes of damages from load, structure stress and production, give the corresponding control methods.


2019 ◽  
Vol 97 ◽  
pp. 03007
Author(s):  
Trong-Chuc Nguyen ◽  
Trong-Phuoc Huynh ◽  
Nguyen-Trong Ho ◽  
Al-Amin Abdun Noor

This study presents a solution to contextualized span bridges constructed with composite steel girders with reinforced concrete slabs by reinforced concrete. This kind of structure, in comparison with a simple span, has many advantages as overcoming internal forces, reducing large displacements and cutting the number of expansion joints. Also, numerical simulations were conducted to evaluate the effectiveness of continuous composite beams for steel-concrete bridges and control of cracking of concrete at the supports at an early age. The models and conclusions in this paper can provide safety guidance for construct composite steel girder bridge in Vietnam.


1972 ◽  
Vol 98 (10) ◽  
pp. 2327-2328
Author(s):  
William C. Schnobrich ◽  
Mohammad H. Salem ◽  
David A. Pecknold ◽  
Bijan Mohraz

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