Vertical STM in Facade Wall of Pylon Anchorage Zone of Cable-stayed Bridge
To the tendon anchorage system in the wall of box pylon of cable-stayed bridge, the facade wall of cable-anchored pylon was researched using strut-and-tie model ( STM). According to the optimization principle of STM, the STM of single anchor was established by means of force method. On the basis of the STM of single anchor, the STM in the facade wall was preliminary built. The expression of internal force in ties about z, the vertical distance between the tie T3 and node 1, was established. Using topology optimization result (T2 = 0) and Cardan Formula, the value of z was determined, the STM in the facade wall was comprehensively solved. Thus, the distribution of compressive and tensile stresses in the facade wall under the action of vertical component of cable force was accurately reflected. Finally, through researching the pylon of Yibin Yangzte River Bridge, the parameter α3 =23.3° was proposed, and the STM in the facade wall was simplified. It has better precision and can be used to determine tendon specification in the anchorage zone of box pylon.
bridge engineeringSTMtopology optimizationanchorage zone of pyloncable-stayed bridgecalculation method
NETL
NSTL
万方数据
维普
