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1.概论PORR股份有限公司接受了上奥地利联邦政府的任务,并在公路事业研究基金的资助下修建了一座跨越阿尔姆(Alm)河的公路桥。该桥的承载结构是一孔简支梁,跨径为76m,建筑高度为2.5m。仅由于采用了预压应力钢棒就能把梁做成非常小的结构高度,使细长比达到h/l
1. Introduction PORR GmbH accepted the task of the Upper Austrian federal government and built a highway bridge across the Alm River with funding from the Highway Career Research Fund. The bearing structure of the bridge is a simple supported beam with a span of 76m and a building height of 2.5m. Simply because the use of prestressed steel bar can make the beam to a very small structural height, the slenderness ratio to h / l