桥梁裂缝产生原因浅析(英文)

The bridge crack has the reason brief analysis

Author: Order

In recent years, our province transportation infrastructure obtained the swift and violent development, each place has constructed the massive concrete bridge. In the bridge construction and the use process, concerns because of appears the crack but to affect the project quality even to lead the report common occurence which the bridge breaks down collapses. The concrete dehiscence may say is "often is taken bad" and "frequently-occurring disease", is puzzling the bridge building technical personnel frequently. Actually, if adopts the certain design and the construction measure, very many cracks are may overcome and control. In order to further strengthens to the concrete bridge crack understanding, avoids in the project appearing the harm big crack as far as possible, this article the reason which and produces to the concrete bridge crack type makes the comprehensive analysis, the summary as far as possible, by facilitates the design, the construction discovers the control crack the feasible means, achieves the guard in not however function .

L concrete bridge crack type, origin

In fact, the concrete structural cracks origin is complex and there are many kinds of factors, even they affect it mutually, but each crack has it to have one kind of or several kind of main reasons. The concrete bridge crack type,as the reason it produced, may divide the following several kinds approximately:

First, the load causes crack

The concrete bridge is static in the convention, moves the crack which under the load and the secondary stress produces to call the load crack, induces mainly has the direct stress crack, the secondary stress crack two kinds. The crack which outside the direct stress crack is refers to which the load to cause the direct stress produces. The crack produces the reason includes:

1st, design calculation stage, when structure computation does not calculate or partially leaks calculated; The computation model is unreasonable; Structure stress supposition and actual stress not symbol; The load little calculated or leaks calculated; The endogenic

force with matches the muscle miscalculation; The structure safety coefficient is insufficient. When structural design does not consider the construction the possibility; The design cross section is insufficient; The steel bar establishment are few or the arrangement

mistake; The structure rigidity is insufficient; The structure processes is improper; The design paper confession is unclear and so

2nd, the construction stage, does not limit piles up the construction machines