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Development of steel arch bridges aimed to cut the construction costs

开发钢拱桥旨在降低建设成本

基本信息

批准号：
12650480
负责人：
YAMAO Toshitaka
金额：
$ 2.37万
依托单位：
Kumamoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650480/
关键词：
deck-type steel arch bridge restoring force model interaction strength curve seismic design non-linear response analysis ultimate strength and behavior 鋼アーチ橋組み合わせ荷重箱形補剛断面高軸力アーチ橋局部座屈幅厚比パラメータ

项目摘要

This study is aimed to clarify 3-dimension seismic behavior of deck-type bridge arches which is composed of parallel twin ribs and pair curved ribs with lateral members. The first, the restoring force model and the interaction curves of stiffened short arch ribs subjected to compression and both in-plane and out-of-plane bending moments were examined. The dimensions of stiffened steel box cross-section of short-arch ribs were obtained from those of real deck-type bridge arches with 100〜200m span lengths. Numerical analyses were conducted using FEM program (MARC) by changing axial force, in-plane and out-of-plane bending moment and the width-to-thickness ratio parameters of the plates of a stiffened steel box cross-section. Based on the numerical results, the interaction curves for yield resultant forces (N, My Mz and T) of stiffened short arch ribs are derived. Strength and ductility of single steel arch bridges were studied experimentally and theoretically. The kind of specimens, that is, one with ordinary stiffener, one of unstiffened sections were tested under equivalent distributed vertical load and cyclic horizontal loads. Numerical analyses were carried out using the FEM program.Furthermore, the nonlinear seismic response analysis of the deck-type steel bridge arch is carried out using restoring force model and the interaction curves. A nonlinear seismic response analysis of a deck-type steel bridge arch is carried out taking into account the effect of interaction strength curves and changing of the axial force. It has been shown that the effect of the taking into account of interaction curves for yield resultant forces on the seismic behavior of deck-type bridge arches is large. Validity of approximated bending moment-curvature relations using proposed restoring force model were shown.

摘要本研究旨在探讨由平行双肋及双曲肋组成的上承式拱桥拱系之三维耐震性能。首先，研究了加筋短拱肋在受压、面内和面外弯矩作用下的恢复力模型和相互作用曲线。根据100 ~ 200 m跨度的真实的上承式拱桥的截面尺寸，得到了加劲钢箱形短拱肋的截面尺寸。采用有限元程序MARC，通过改变轴力、面内、面外弯矩和板的宽厚比参数，对加筋钢箱形截面进行了数值分析。根据数值计算结果，推导了加劲短拱肋屈服合力（N、My、Mz和T）的相关曲线。对单钢拱桥的强度和延性进行了试验和理论研究。对普通加劲肋和非加劲肋两种截面形式的试件进行了竖向荷载和水平荷载的等效试验。利用有限元程序进行了数值分析，并利用恢复力模型和相关曲线对上承式钢桥拱进行了非线性地震反应分析。考虑相互作用强度曲线和轴力变化的影响，对上承式钢桥拱进行了非线性地震反应分析。结果表明，考虑屈服合力相关曲线对上承式拱桥抗震性能的影响是很大的。结果表明，采用所提出的恢复力模型近似弯矩-曲率关系是有效的。