Seismic Analysis Model of Partially Concrete-Filled Steel Piers Considering Ultralow-Cycle Fatigue Crack Propagation

被引：1

作者：

Zhuge, Hanqing ^{[1
]}

Du, Rui ^{[1
]}

Li, Shuailing ^{[2
]}

Tang, Zhanzhan ^{[3
]}

机构：

[1] Zhejiang Univ Sci & Technol, Coll Civil Engn & Architecture, 514 C2 Bldg, Hangzhou 310023, Zhejiang, Peoples R China

[2] Tsinghua Univ, Coll Civil Engn, Beijing, Peoples R China

[3] Yangzhou Univ, Coll Civil Sci & Engn, Yangzhou, Jiangsu, Peoples R China

来源：

JOURNAL OF EARTHQUAKE ENGINEERING | 2024年 / 28卷 / 07期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Bridge engineering; partially concrete-filled steel tube bridge piers; local instability; ultralow-cycle fatigue cracking; crack propagation process; STRUCTURAL-STEELS; DUCTILE; INITIATION; STRENGTH; BEHAVIOR; COLUMNS; SHEAR;

D O I：

10.1080/13632469.2023.2276700

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Seismic performance of partially concrete-filled steel tube (PCFST) bridge piers is controlled by the coupled failure of ultralow-cycle fatigue (ULCF) and local instability of steel plates. An empirical formula was established for the plastic fracture displacement on average stress triaxiality of the crack intiation process, and the two-stage prediction model for the ULCF cracking of steel was improved. Furthermore, an empirical formula was established for the plastic strain amplification factor on the element size and the stress triaxiality of the coarse model. A complete modeling method was proposed for the seismic performance analysis model of PCFST piers considering ULCF cracking.

引用

页码：2027 / 2049

页数：23

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