主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (5): 634-638.

• • 上一篇    下一篇

基于混合模拟的连柱钢框架抗火性能分析

蔡新江1,2，陈喆颖1，毛小勇1,2，田石柱1,2   

  1. 1. 苏州科技大学土木工程学院，江苏苏州215011；2. 苏州科技大学江苏省结构工程重点实验室，江苏苏州215011
  • 出版日期:2021-05-15 发布日期:2021-05-15
  • 作者简介:蔡新江(1981-)，男，满族，黑龙江五常人，苏州科技大学副教授，博士，主要从事结构抗震抗火性能分析研究,江苏省苏州市高新区滨河路1701 号，215011。
  • 基金资助:
    国家自然科学基金项目(51778395);江苏省自然科学基金(BK20171221);江苏高校“青蓝工程”(2018);江苏省“333 工程”(2018);江苏高校优势学科建设工程资助项目(PAPD)

Fire resistance analysis of linked column frame based on hybrid simulation

CAI Xin-jiang1,2, CHEN Zhe-ying1, MAO Xiao-yong1,2, TIAN Shi-zhu1,2   

  1. 1. Department of Civil Engineering, Suzhou University of Science and Technology, Jiangsu Suzhou 215011, China; 2. Jiangsu Province Key Laboratory of Structural Engineering, Jiangsu Suzhou 215011, China
  • Online:2021-05-15 Published:2021-05-15

摘要： 采用混合模拟方法，以三层平面连柱钢框架为研究对象，针对底层中柱受火工况，分别进行实体单元整体框架、多尺度整体框架、多尺度混合模拟整体框架、传统受火单柱的抗火性能分析，对比不同模型的耐火极限、轴向变形、轴力和侧向变形。结果表明：传统受火柱缺少约束效应，导致耐火极限偏小，其轴向变形后期变形速率较快，较大侧向变形发生较早，结果偏于保守；多尺度混合模拟结果与实体单元整体结构较为吻合，在保证精度的前提下可提高效率。本文结论验证了混合模拟方法用于整体结构抗火分析的可行性，也为结构抗火性能分析提供了一种新手段。

关键词: 连柱钢框架, 抗火, 多尺度, 混合模拟, 子结构

Abstract: This paper adopts the hybrid simulation method, taking the three- story plane linked column frame as the research object, aiming at the fire condition of the bottom middle column, carries out the fire resistance performance of the whole frame with solid elements, the whole frame with multi-scale elements, the whole frame with multi- scale hybrid simulation elements and traditional single column, then compares with the fire resistance limit, axial deformation, axial force and lateral deformation. The results show that the traditional fire column lacks the restraint effect and the fire resistance limit is smaller, the deformation rate of the axial deformation is faster in the later stage, and the larger lateral deformation occurs earlier, the result is conservative. The multi- scale hybrid simulation results are more consistent with the overall structure, the efficiency is improved under the premise of ensuring the accuracy. The conclusions verifies the feasibility of the hybrid simulation method for the fire resistance analysis of the whole structure, and provides a new method for the fire resistance analysis of the structure.

Key words: linked column frame, fire resistance, multi- scale, hybrid simulation, substructure