雙跨扇狀斜張橋的設計與分析

Design and Analysis of Cable-Stayed Bridge with a Two-Span and Modified Fan System

毛宗鑫(Zong-Sin Mao)

指導教授 ： 鄭金國

中原大學/工學院/土木工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200901375

摘要

斜張橋與懸索橋兩者構造相近，吊索均承受張力，但主梁的力學行並不盡相同，懸索橋採密集式垂直吊索支撐主梁，再將力量傳遞至自然懸垂之主索；斜張橋則以預施拉力之斜撐吊索支撐橋面，適度減少並分配主梁之彎曲力矩，其行為猶如利用垂直彈簧支撐主梁。主梁另承受軸向預壓力，類似以預力方式，增加主梁承受外來載重的能力。因此，斜張橋是一種原理簡單，但力學行為複雜到需用高速電子計算機分析卻又可節省材料的高度靜不定的先進橋梁型式。
本文首先對斜張橋作一整體性的介紹，包含斜張橋歷史回顧。再舉一個斜張橋案例，作靜力和動力分析，並說明結構行為和設計準則，最後作討論及建議。
本文以TANGO和SAP2000軟體程式作斜張橋分析研究，探討斜張橋在不同載重作用下及受地震力影響下之力學行為，並作容許彎曲應力檢核、剪應力檢核及垂直變位檢核，以確認設計之合理性。

關鍵字

斜張橋 ； TANGO

並列摘要

The structures of cable-stayed bridge and suspension bridge are similar to each other in their tension-member behaviors, but the structural behaviors of their deck are somehow different. In the suspension bridge, the deck is supported by intensively, vertical suspension cables that transfer the force to the cable; on the other hand, the deck of the cable-stayed bridge is supported by the pre-stressed cables, which can reduce and re-distribute the bending moments of the deck. This is similar to the pre-stress design, in which the deck can resist more external loads. Therefore, the cable-stayed bridge is a highly static, indeterminate-bridge type with simple mechanics rules, which is usually analyzed by high-speed computers in order to get a better design.
In this study, a comprehensive review is made of the cable-stayed bridge, including a study of the cable-stayed bridge, the analysis, and a design case based on the codes. Additionally, a cable-stayed bridge is used as a study case to illustrate the static and dynamic behaviors. Finally, a discussion and recommendations are made.
The analyses of the cable-stayed bridge were performed using TANGO and SAP2000 programs to investigate the structural behaviors of the bridge under the different load combinations, and to ensure that the case fit the design criterions

並列關鍵字

cable-stayed bridge ； Tango

參考文獻

2. 交通部，「公路橋梁設計規範」，幼獅文化事業股份有限公司，台北市，(1987)。

5. 許清雯，「斜張橋設計與分析」，碩士論文，私立中原大學土木工程學系研究所，桃園(2003)。

6. 鄭雅文，「斜張橋在不同載重組合下的靜力分析及自重下的振態分析」，碩士論文，私立中原大學土木工程學系研究所，桃園(2006)。

7. 馬瑞符，「利用多振態反應譜疊加法作斜張橋之耐震分析（CQC&SRSS）」，碩士論文，私立中原大學土木工程學系研究所，桃園(2006)。

15. 溫佳敏，「斜張橋的設計與振態分析」，碩士論文，私立中原大學土木工程學系研究所，桃園(2003)。