scholarly journals Contributions of Flexible-Arch Configurations in Shimenzi Arch Dam: New Evidence from Field Measurements

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Jianwen Zhong ◽  
Enzhi Wang ◽  
Yuande Zhou ◽  
Qingbin Li ◽  
Penghui Li
Keyword(s):  
Field Measurements ◽  
Arch Dam ◽  
Artificial Joints ◽  
The Past ◽  
Numerical Studies ◽  
Force Transfer ◽  
New Type ◽  
Contraction Joint ◽  
Arch Structure ◽  
New Evidence

This paper presents a retrospective investigation into the performance of a new type of flexible-arch configurations in Shimenzi arch dam based on the past ten-year-long field measurements. The flexible-arch configurations are mainly comprised of artificial short joints at the middle downstream surface and a middle contraction joint with hinged well and enlarged arch ends with bending joints. Fundamental design considerations of these components are provided, and their contributions to the performance of Shimenzi arch dam are discussed in detail using the monitoring data from joint meters, strain gauges, and thermometers. Some elementary numerical studies have been conducted on a typical arch structure with different arrangements of artificial joints. Both the field data and numerical results prove well the effectiveness of the purposely built short joints and the middle contraction joint on the relaxation of tensile stress mobilization. Field survey data also clearly demonstrate the significance of the hinged well at the upstream side of the middle joint for a continuous arch force transfer.

Stress Analysis for Cement Concrete around Joint Dowel after Loosing

2013 ◽  
Vol 857 ◽  
pp. 222-226
Author(s):  
Rong Guo Hou ◽  
Kai Min Niu
Keyword(s):  
Shear Stress ◽  
Stress Concentration ◽  
Load Transfer ◽  
Concrete Slab ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Transfer Capability ◽  
Cement Concrete Pavement ◽  
Contraction Joint ◽  
Increasing Load

The stress concentration will appear in cement concrete around joint dowel set in contraction joint of cement concrete pavement with repeated loads. And concrete around joint dowel will damage gradually.In this paper, the stress of concrete around joint dowel and deflection of concrete slab are analyzed when joint dowel loosing. It is indicated that the shear stress is key to damage of concrete around joint dowel. when the loosing width reaches certain extent. With loosing width increasing, load transfer capacity will decrease gradually. And it is shown that the load transfer capability will lower rapidly when the loosing width comes in 4cm.

Study on Shearing Stress of Asphalt Surface on Lean Concrete Base

2012 ◽  
Vol 178-181 ◽  
pp. 1402-1405
Author(s):  
Li Jun Suo
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Asphalt Pavement ◽  
Element Model ◽  
The Other ◽  
Three Dimension ◽  
Shearing Stress ◽  
Concrete Base ◽  
Contraction Joint ◽  
Decrease Decrease

In order to study the shearing stress of asphalt surface on lean concrete base, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for shearing stress of asphalt surface in transverse contraction joint of lean concrete base, and the other is analysis for relationship between load stress of asphalt surface and parameters, such as thickness, modulus. The results show that maximum shearing stress, which is caused by load, is evident in asphalt surface which is located in transverse contraction joint of lean concrete base of asphalt pavement. Maximum shearing stress decrease, decrease, decrease and increase respectively with increase of the surface’s modulus, the surface’s thickness, base’s thickness and ratio of base’s modulus to foundation’s modulus.

Research on the Contraction Joint Width of Rubberized Concrete Pavement

2011 ◽  
Vol 287-290 ◽  
pp. 436-444 ◽  
Author(s):  
Feng Qin ◽  
Zhuang Bin He ◽  
Qiong Nian Huang
Keyword(s):  
Portland Cement ◽  
Engineering Application ◽  
Concrete Pavement ◽  
Rubberized Concrete ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Joint Spacing ◽  
Cement Concrete Pavement ◽  
Contraction Joint ◽  
Portland Cement Concrete Pavement

This paper describes the calculation analysis of joint open, and the research has been carried up on Portland cement concrete pavement and rubberized concrete pavement with the consideration of hogging distortion caused by temperature, expansion deformation and drying shrinkage. Finally ,it were observed that joint open of 6m contraction joint spacing for rubberized concrete pavement is the same as 4.5m contraction joint spacing for Portland cement concrete pavement. The above analysis provides the possibility of 6-meter contraction joint spacing for rubberized concrete pavement which give theoretical basis for engineering application.

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