钢框架结构抗连续性倒塌设计方法研究
VIP免费
摘 要
建筑结构抗连续性倒塌能力的重要性已经引起了工程界的普遍重视，国外提
出了多种抗连续倒塌设计方法，形成了比较清晰的抗倒塌设计思想。常规结构设
计是针对完好结构进行的，抗连续倒塌设计如何与传统的结构设计方法相融合是
这个领域的难点。我国对结构防连续性倒塌的研究还没有形成相关可操作的方法，
国内对钢筋混凝土结构的研究比较普遍，随着我国钢结构建筑的广泛出现，研究
钢结构抗连续倒塌设计方法，对我国建筑结构防连续性倒塌理论的发展具有重要
的理论意义和实用价值。
引起结构连续倒塌的突发事件存在偶然性和低概率性，导致结构可能发生连
续倒塌的初始局部破坏无法预估和量化，只靠加强局部构件或节点连接不能有效
避免破坏发生，需要从提高结构整体的抗倒塌能力入手。本文基于这种思想，不
关注构件的失效方式和损伤程度，只关注失效构件去除后的结果，进行了以下几
方面的研究工作：
（1）以现有相关文献、规范为依据，介绍了结构防连续性倒塌领域已取得的
成果，基于定义阐述了连续倒塌的本质。对比了国外规范推荐的四种抗连续倒塌
设计方法，引进了建筑分类设计策略。详细介绍了规范重点推荐的拆除构件法。
（2）采用 SAP2000 大型结构分析软件对一榀平面钢框架结构依次进行线性静
力分析、非线性静力分析、线性动力分析、非线性动力分析，得到其在拆柱后的
结构响应，给出了四种分析方法的实现步骤和评估准则，对比了分析结果。
（3）分别拆除同一个空间钢框架结构不同位置和不同楼层的框架柱，采用线
性静力分析方法对其抗连续倒塌性能进行评估，判断按照我国抗震规范设计的钢
框架结构抗连续倒塌能力。
（4）对前面设计的空间钢框架结构采用不同的抗震设防烈度重新设计，研究
了抗震设防烈度的提高对结构抗连续倒塌能力的影响，探讨抗震设计与倒塌控制
设计之间的关系，给出钢结构抗倒塌设计的详细流程和相关措施。
关键词：钢框架结构 防连续性倒塌 拆除构件法 线性静力分析 抗震
设防烈度
ABSTRACT
The importance of capacity of anti-progressive collapse has caused widespread
attention to the engineering sector. A variety of design methods to resist progressive
collapse were proposed at abroad, and a clear idea of it was formed. Conventional
structure design was conducted for the intact structure. How to integrate the resistance
of progressive collapse with traditional design methods is the difficulty in this area. The
research on the anti-progressive collapse of the structure has not formed operational
methods in China. Domestic research focused on reinforced concrete structure, with the
widespread use of steel construction, steel structure design method to resist progressive
collapse has important theoretical and practical value for the development of
anti-progressive collapse of the building structure theory.
The incidents causing progressive collapse is occasional and low-probability, that
make initially localized resulting in progressive collapse unable to be predicted and
quantified. Therefore, it is not effective to prevent the failure from occurring by
strengthening the local component or node connection alone unless the ability to resist
collapse of the overall structure is improved. Based on this opinion, when removing
failed components, the response of the overall structure is concerned instead of the
failure mode and damage level of components in this paper. The following aspects of
the research work were conducted down:
(1) According to existing literatures and corresponding codes, this paper
introduced the achievements in the field of anti-progressive collapse, and the collapse
mechanism is elaborated based on its definition. By comparison of four design method
of anti-progressive collapse that is recommended in foreign specifications, the
classification for structure design is introduced. The removal component method is
specifically addressed, which is highly recommended in codes.
(2) To gain the response of a plane steel frame when columns are removed, linear
static analysis, nonlinear static analysis, linear dynamic analysis and nonlinear dynamic
analysis are conducted in turn by using structure analysis software, SAP2000, of which
implementation steps and assessment criteria are given, as well as the comparison of the
results.
(3) After demolishing the columns of a 3-D steel frame structure at different
locations and on different floors in turn, its performance of anti-progressive collapse is
assessed by linear static analysis. Thus the capacity of anti-progressive collapse of the
steel frame structure which is designed by seismic codes can be judged.
(4) The 3-D steel frame structure is redesigned upon different seismic intensity to
study the impact on the structure of the anti-progressive collapse when the seismic
intensity is improved. This paper discussed the relationship between seismic design and
progressive collapse design, and a detailed design process for anti-collapse design of
steel structure is given.
Key Word: steel frame structure, progressive collapse, the removal
component method, linear static analysis method, seismic fortification
intensity
目 录
中文摘要
ABSTRACT
第一章 绪 论 ........................................................ 1
1.1 研究背景 ................................................... 1
1.2 结构抗连续性倒塌国内外研究现状 ............................. 3
1.2.1 国外研究现状 .......................................... 3
1.2.2 国内研究现状 .......................................... 4
1.3 国外关于抗连续性倒塌的规范指南 ............................. 6
1.3.1 英国规范 .............................................. 6
1.3.2 欧洲规范 .............................................. 6
1.3.3 美国规范 .............................................. 7
1.3.4 各规范比较及使用情况 .................................. 8
1.4 连续性倒塌机理分析 ......................................... 8
1.5 本文的主要研究内容 ......................................... 9
第二章 结构抗连续性倒塌设计方法 .................................... 10
2.1 抗连续性倒塌设计方法 ...................................... 10
2.1.1 现有规范设计方法 ..................................... 10
2.1.2 现有规范设计方法分析 ................................. 11
2.2 抗连续性倒塌的分类设计策略 ................................ 12
2.3 拆除构件法 ................................................ 14
2.3.1 拆除位置 ............................................. 14
2.3.2 分析荷载 ............................................. 14
2.3.3 分析流程 ............................................. 16
2.3.4 失效准则 ............................................. 16
2.4 拆除构件分析方法 .......................................... 18
2.4.1 线性静力分析方法 ..................................... 18
2.4.2 非线性静力分析方法 ................................... 19
2.4.3 线性动力分析方法 ..................................... 20
2.4.4 非线性动力分析方法 ................................... 20
2.5 本章小结 .................................................. 22
第三章 抗连续性倒塌分析方法对比 .................................... 23
3.1 平面钢框架结构模型 ........................................ 23
3.1.1 结构模型信息 ......................................... 23
3.1.2 梁极限承载力计算 ..................................... 23
3.1.3 结构常规荷载下受力分析 ............................... 24
3.2 边柱失效抗连续性倒塌分析 .................................. 25
3.2.1 线性静力分析 ......................................... 25
3.2.2 非线性静力分析 ....................................... 27
3.2.3 线性动力分析 ......................................... 30
3.2.4 非线性动力分析 ....................................... 32
3.3 分析结果对比 .............................................. 33
3.4 本章小结 .................................................. 34
第四章 空间钢框架结构竖向连续性倒塌分析 ............................ 36
4.1 结构模型设计及判定准则 .................................... 36
4.1.1 钢框架结构模型设计 ................................... 36
4.1.2 分析计算条件 ......................................... 37
4.1.3 失效准则及破坏限度 ................................... 37
4.2 不同柱失效连续性倒塌分析 .................................. 38
4.2.1 选择移除杆件 ......................................... 38
4.2.2 移除边柱 ............................................. 39
4.2.3 移除角柱 ............................................. 41
4.2.4 移除内部柱 ........................................... 43
4.3 结果对比分析 .............................................. 46
4.3.1 内力对比分析 ......................................... 46
4.3.2 周期对比分析 ......................................... 46
4.3.3 位移对比分析 ......................................... 47
4.4 本章小结 .................................................. 48
第五章 不同抗震设防烈度钢框架抗连续倒塌能力分析 .................... 49
5.1 不同抗震设防烈度钢框架结构模型 ............................ 49
5.2 钢框架结构连续倒塌能力分析对比 ............................ 50
5.2.1 内力分析 ............................................. 50
5.2.2 周期分析 ............................................. 55
5.2.3 位移分析 ............................................. 56
5.2.4 分析小结 ............................................. 57
5.3 钢结构倒塌控制设计 ........................................ 58
5.3.1 倒塌控制设计与抗震设计的关系 ......................... 58
5.3.2 倒塌控制设计流程 ..................................... 59
5.3.3 倒塌控制设计措施 ..................................... 59
5.4 本章小结 .................................................. 60
第六章 结论与展望 .................................................. 62
6.1 本文主要结论 .............................................. 62
6.2 研究展望 .................................................. 63
参考文献 ........................................................... 64
在读期间公开发表的论文和承担科研项目及取得成果 ..................... 68
致 谢 .............................................................. 69
相关推荐
作者：侯斌
分类：高等教育资料
价格：15积分
属性：73 页
大小：4.01MB
格式：PDF
时间：2025-01-09
