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从桥梁建筑的新趋势看来,混凝土细长墩的应用已越来越广泛。为满足人们的美学要求,变截面桥墩也得到了应用。许多工程已应用了空心墩,在充分降低恒载的同时提供足够的刚度和强度,这在节约桥墩材料和对基底承载力的要求上都是有利的。 细长变截面及空心截面墩的设计是很复杂的。目前的AASHTO规范仅采用了一种近似的细长混凝土受压构件的设计,即ACI建筑法规中的有关弯矩增大设计方法。在制定ACI条
From the new trend of bridge construction, the application of concrete slender pier has been more and more widely. To meet people’s aesthetic requirements, variable cross-section piers have also been applied. Many projects have applied hollow piers to provide adequate stiffness and strength while substantially reducing dead load, which is advantageous both in the material of the piers and in the bearing capacity of the substrate. Slender variable cross-section and hollow section pier design is very complicated. The current AASHTO specification uses only an approximation of the design of Slender Concrete Compression Members, the ACI Building Code regarding the design of moment increases. In the development of ACI article