本文主要目的乃在探討外部預力節塊橋樑受車輛動力載重之反應，並與靜力分析結
果做一比較。有限元素分析模式採用平板殼元素、連接元素及預力鋼鍵元素分別模擬橋
樑混凝土斷面、節塊間接合以及外部預力鋼鍵。車輛載重以一移動的HS20-44卡車做為
動力分析的外力，數值分析方法採用Newrnarkβ積分。本文以一座三跨連續橋作為分析
的例題，比較此橋之動力分析及靜力分析，其位移、預力量以及節塊間開裂行為之變
化，最後並討論橋樑之韌性及極限強度。 The purpose of this paper is to investigate the dynamic response of the externally
prestressed concrete bridge due to vehicle loads and compare the results with static analysis .
The finite element library consists of flat-facet shell elements, link elements and tendon
elements which are used to model the concrete section, the key joints and the external
tendons of the segmental bridge, respectively. The dynamic loading is simulated by a
HS20-44 truck moving along the bridge. This model is then used for a three-span bridge with
external prestressing. The variations of the displacements and the prestressing forces due to
different loadings are presented. The ductility and the ultimate strength of the bridge are also
discu ssed.
關聯:
中華民國第二屆結構工程研討會暨國科會工程處結構工程專題研究成果研討會論文集(一)=Proceedings of the second National Conference on Structural Engineering，頁474-481
