RC剪力墙结构破坏模式的评价指标及其评价方法初探

A Thesis Submitted to Chongqing University in Partial Fulfillment of the Requirement for the Master’s Degree of Engineering
By Tan Ke Supervised by Associate Prof. Ji Shuyan Assistant Supervised by Prof. Li Yingmin Specialty: Civil Engineering
RC 剪力墙结构破坏模式的评价指标 及其评价方法初探
重庆大学硕士学位论文
（学术学位）
学生姓名：谭 科 指导教师：姬淑艳 李英民 专 业：土木工程 副教授 教 授
学科门类：工 学
重庆大学土木工程学院
二 O 一三年五月
Primary Study on Evaluation Indices and Method for Failure Modes of Shear Wall Structure
College of Civil Engineering of Chongqing University, Chongqing, China May 2013
中文摘要
摘
要
我国规范倡导的 RC 剪力墙结构破坏模式单一， 理论上还可能存在其他合理的 破坏模式，只是当下缺少对破坏模式的系统的评价指标和评价方法，阻碍了评价 RC 剪力墙结构可能的破坏模式。鉴于此探寻 RC 剪力墙结构强震破坏模式的评价 指标和评价方法具有现实意义。本文从 RC 剪力墙结构破坏模式的安全性入手，兼 顾考虑形成这样的破坏模式的经济代价， 共选取 5 种评价指标 ；然后采用 PERFORM-3D 软件建立平面 RC 剪力墙分析模型， 对其进行动力弹塑性时程分析， 得到 RC 剪力墙结构不同的破坏模式， 利用上述破坏指标分别进行评价 RC 剪力墙 结构破坏模式；最后提出一种综合性评价方法，综合地评价 RC 剪力墙结构的破坏 模式。 本文通过分析本文得出以下初步结论： ① 筛选出 5 个评价 RC 剪力墙破坏模式的评价指标，构成评价方法的指标体 系； ② 提出了一种综合性评价方法，兼顾了 RC 剪力墙结构破坏模式的安全性层 次和经济性层次的评价； ③ 破坏模式具有的安全性保障并不与付出的经济代价成正比，为设计提供了 一种思想方法，即保证结构安全裕度的情况下，有意识的削弱其他构件， 引导另外一种兼顾安全和经济的破坏模式出现。 ④ 连梁跨高比是影响剪力墙结构的破坏模式的主要矛盾之一，墙肢的极限承 载力并不是主要矛盾。 关键词：剪力墙结构，破坏模式，PERFORM-3D，评价指标，评价方法
III
重庆大学硕士学位论文
IV
目
录
目
Βιβλιοθήκη Baidu
录
中文摘要..........................................................................................................................................I 英文摘要....................................................................................................................................... III 1 绪 论......................................................................................................................................... 1
2 结构破坏模式评价指标的选择 ................................................................................... 7
2.1 影响 RC 剪力墙结构破坏模式的因素分析........................................................................ 7 2.1.1 轴压比的影响 ............................................................................................................ 7 2.1.2 连梁跨高比的影响 .................................................................................................... 9 2.1.3 底部加强区范围的影响 .......................................................................................... 10 2.1.4 剪力墙布置方式的影响 .......................................................................................... 12 2.1.5 地震动特性的影响 .................................................................................................. 13 2.2 基于安全性层次的评价指标 ............................................................................................. 14 2.2.1 强度破坏准则 .......................................................................................................... 14 2.2.2 变形破坏准则及层间位移角指标 .......................................................................... 14 2.2.3 能量破坏准则及耗能损伤指数 .............................................................................. 15 2.2.4 变形和能量双重破坏准则及 Park-Ang 损伤指数（DF） .................................... 15 2.3 基于经济性层次的评价指标 ............................................................................................. 17 2.3.1 修建初始造价（C）................................................................................................ 17 2.3.2 修复费用率（BRCR）............................................................................................ 17 2.3.3 修复时间率（BRTR） ............................................................................................ 18 2.3.4 可修复性等级临界值 .............................................................................................. 19
1.1 前言 ....................................................................................................................................... 1 1.2 国内外研究现状 ................................................................................................................... 1 1.2.1 RC 结构强震破坏模式的抗震设计方法 ................................................................... 1 1.2.2 RC 结构的强震破坏模式 ........................................................................................... 2 1.2.3 RC 剪力墙结构破坏模式研究成果及不足 ............................................................... 3 1.3 本文的主要研究工作 ........................................................................................................... 5 1.3.1 研究目标 .................................................................................................................... 5 1.3.2 研究思路和研究内容 ................................................................................................ 5
I
重庆大学硕士学位论文
II
英文摘要
ABSTRACT
The failure mode of RC shear wall structure advocated by the Current China Seismic Design Code of Buildings is monotone. In theory, there may be more reasonable failure modes, but the current lack of evaluation indices and evaluation method hinders the evaluation of possible failure modes for RC shear wall structure. So, to explore evaluation indices and evaluation methods is practically significant to the failure modes of RC shear wall structure. In this thesis, the study combines the security about RC shear wall structure failure mode and economy cost by this failure mode, and selects 5 indices. Then some kinds of RC shear wall structure failure modes, the results of RC shear wall structure models which is built in PERFORM-3D and used by nonlinear response history analyses , are evaluated by above indices independently. At last, one kind of comprehensive evaluation method is proposed, and RC shear wall structure failure modes are evaluated comprehensively in this method. By analyzing this article draws the following preliminary conclusions: (1) Screening out five indices to evaluate RC shear wall failure modes. Those indices make up the evalution indices of evalution method. (2) Proposing one kind of comprehensive evaluation method, which combines safety evalution and economy evalution. (3) Safety possed by failure modes are not proportional with the economic cost. It is a practical idea that some components weaked can lead to some reasonable failure modes which can be both safe and economic, when the safety of RC shear wall structure is guaranteed. (4) The span-to-depth ratio is one of main factors influencing failure modes of RC shear wall structure, and ultimate strength is not. Keywords: Shear Wall Structure, Failure Mode, PERFORM-3D, Evaluation Indices, Evaluation Method