Asphalt coating double - sided self - adhesive anti - cracking waterproof adhesive film 

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chenchen12495
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Highway bridge expansion and contraction key is the bridge construction and maintenance of one of the problems. The telescopic dimension of the bridge is exposed to the atmosphere for a long time, and the environment is relatively poor. It is the most vulnerable site in the bridge structure. Bridge expansion joints in the design, construction on a little defect or lack, it will cause its early damage; and bridge expansion joints damage,re asphalt driveway and may cause a large vehicle impact load, deterioration of traffic conditions, drastically reduce the bridge life. For this reason, this paper analyzes the influencing factors of the bridge without the expansion of the actual work experience, and puts forward the concrete support conclusion.

1. Structural details of non-articulated bridge The concrete beam and steel beam are constructed with the overall structure of the non-expansion joints. The details of the structure of the structure is only a basic skeleton, but also can not reflect the other design aspects of the important details. It is only in order to give the first contact to the people without the expansion of the bridge with a basic concept and impression,infrared asphalt repair reviews it is impossible in this article for more detailed description and description, which we will be further elaborated in the future discussion. But the initial understanding of these details of the structure for a comprehensive understanding of the performance of non-expansion joints bridge, integrity and durability will be of great help.

2. Influencing factors in the design of the non-retractable bridge design Since the longitudinals of the bridge without the expansion joints are embedded in the concrete abutment, the upper structure is partially restrained, so the influence of the secondary load is taken into account. The following summarizes the effects of secondary loads. The effect of creep The rate of strain caused by creep depends on the span of the upper structure,asphalt emulsion plant manufacturers the age at which the concrete is subjected to the load, the duration of the load, the mass of the concrete, the surrounding temperature, and the shape of the concrete. In this paper, the effect of creep on the non - telescopic bridge with small span and steel - concrete composite beams is analyzed by the effective elastic modulus method with age change. The results show that the existence of creep can reduce the tensile stress at the abutment and the top edge of the top of the pier, but also increase the compressive stress of the lower edge of the steel stringer (less than 10% of the stress caused by the dead load, The force of the structure has a detrimental effect). Therefore, in the design of small span, steel - concrete composite beam without expansion joints bridge can not consider the impact of creep.

  Wednesday, March 8, 2017 at 11:55:40 PM

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