|
|
★ ★
wypward(金币+1):谢谢参与 2010-06-09 19:37:01
sirljz(金币+1): 2010-06-09 23:30:23
11211121(金币+5, 翻译EPI+1): 2010-06-10 14:59:09
|
With the continuous beams and rigid frame a wide range of applications found in the construction of some bridges cracks in the web. In this paper, calculation of elasticity of concrete webs three cases to force the main tensile stress, and compared the maximum principal tensile stress within the webs and the relationship between the tensile strength of concrete, thus explain the reasons for crack web. Combined with the actual bridge, the establishment of three-dimensional solid model using ansys simulation of a continuous beam, continuous rigid frame bridge in place cantilever construction method with the four operating conditions when the stress state of concrete webs, calculated the maximum principal tensile stress, respectively: 1.04MPa , 3.93MPa, 2.81MPa and-0.47MPa. Therefore, effective control of vertical webs of prestressed concrete principal tensile stress, for the prevention of concrete principal tensile stress exceeds the internal webs of concrete tensile strength, should be first in the construction of vertical prestress tension, followed by the level of prestress tension steel, and finally tensioned prestressed reinforced vertical curve. |
|
回复此楼