发布时间 : 星期六 文章沈靓-汶川地震中建筑物典型震害分析与数值计算 - 图文更新完毕开始阅读
3.4.4梁柱加腋处应力计算 ............................................................................... 56 3.5小结 ........................................................................................................................ 58 第四章 结论与展望.......................................................................................................... 59
4.1主要结论 .............................................................................................................. 59
4.1.1框架楼梯震害分析结论 ........................................................................... 59 4.1.2底层框架上部砖房结构震害分析结论 ................................................. 60 4.2 展望...................................................................................................................... 61 参考文献 .............................................................................................................................. 62
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图2.1 双跑板式楼梯结构平面布置示意图 ........................................................................ 4 图2.2 板式楼梯各部分传力途径 ........................................................................................ 5 图2.3 08版SATWE计算模型 .......................................................................................... 7 图2.4 楼梯构造措施 ............................................................................................................ 8 图2.5 板式楼梯梯段板1/4跨处破坏 ............................................................................... 10 图2.6 板式楼梯梯段板中部塑性铰 .................................................................................. 10 图2.7 梁式楼梯梯段中部塑性铰 ...................................................................................... 10 图2.8 板式楼梯梯段板中部塑性铰 .................................................................................. 10 图2.9 板式楼梯梯段中部塑性铰 ...................................................................................... 10 图2.10 板式楼梯梯段板中部塑性铰 ................................................................................ 10 图2.11 板式楼梯梯段中部塑性铰 .................................................................................... 10 图2.12 板式楼梯梯段板中部塑性铰 ................................................................................ 10 图2.13 折板楼梯梯段板破坏 ............................................................................................ 11 图2.14 旋转楼梯梯段板破坏 ............................................................................................ 11 图2.15 楼梯间角柱破坏 .................................................................................................... 11 图2.16 楼梯间角柱破坏 .................................................................................................... 11 图2.17 平台梁与支承短柱节点破坏 ................................................................................ 12 图2.18 楼梯平台梁支承处破坏 ........................................................................................ 12 图2.19 平台梁与支承短柱节点破坏 ................................................................................ 12 图2.20 平台梁与支承短柱节点破坏 ................................................................................ 12 图2.21 楼梯起步梁支承短柱破坏 .................................................................................... 13 图2.22 楼梯起步梁支承短柱破坏 .................................................................................... 13 图2.23 楼梯平台梁及板剪断 ............................................................................................ 13 图2.24 楼梯平台梁及板剪断 ............................................................................................ 13 图2.25 楼梯平台梁剪切破坏 ............................................................................................ 13 图2.26 楼梯平台梁剪切破坏 ............................................................................................ 13 图2.27 楼梯平台梁剪切破坏 ............................................................................................ 14 图2.28 楼梯平台梁剪切破坏 ............................................................................................ 14 图2.29 楼梯平台梁中部剪切破坏 .................................................................................... 14 图2.30 楼梯支承处梁柱破坏 ............................................................................................ 14 图2.31 梯段板施工缝处破坏 ............................................................................................ 15 图2.32 梯段板施工缝处破坏 ............................................................................................ 15 图2.33 梯段板施工缝处破坏 ............................................................................................ 15 图2.34 梯段板施工缝处破坏 ............................................................................................ 15
图2.35 梯段板采用冷扭钢筋脆性破坏 ............................................................................ 15 图2.36 梯段板采用冷扭钢筋脆性破坏 ............................................................................ 15 图2.37 钢材冷加工面积改变率与力学性能变化的关系[23]............................................ 16 图2.38 无填充墙楼梯梯段板破坏 .................................................................................... 16 图2.39 有填充墙楼梯梯段板完好 .................................................................................... 16 图2.40 室外楼梯无填充墙梯段板破坏 ............................................................................ 17 图2.41 室内楼梯填充墙破坏梯段板完好 ........................................................................ 17 图2.42 无填充墙梯段板破坏 ............................................................................................ 17 图2.43 填充墙破坏梯段板完好 ........................................................................................ 17 图2.44 室外楼梯折板处破坏 ............................................................................................ 17 图2.45 室外楼梯梯段板斜向剪切破坏 ............................................................................ 17 图2.46 室外疏散楼梯基本完好 ........................................................................................ 18 图2.47 室外疏散楼梯倒塌 ................................................................................................ 18 图2.48 填充墙破坏阻塞疏散通道 .................................................................................... 18 图2.49 填充墙破坏阻塞疏散通道 .................................................................................... 18 图2.50 填充墙阻塞通道 .................................................................................................... 18 图2.51 填充墙阻塞通道 .................................................................................................... 18 图2.52 填充墙阻塞通道 .................................................................................................... 18 图2.53 地震时单质点体系的运动状态 ............................................................................ 21 图2.54 模型标准层结构平面布置图（单位mm） ......................................................... 23 图2.55 结构三维模型 ........................................................................................................ 25 图2.56 结构各层位移的比较 ............................................................................................ 26 图2.57 结构层间位移角的比较 ........................................................................................ 26 图2.58 各层楼梯间角柱的轴力比较 ................................................................................ 27 图2.59 楼梯间角柱弯矩截图 ............................................................................................ 27 图2.60 楼梯标准层平面布置图 ........................................................................................ 28 图2.61 楼梯不同布置层位移和层间位移角的比较 ........................................................ 29 图2.62 楼板和梯段板等效应力云图 ................................................................................ 30 图2.63 梯段板轴力云图 .................................................................................................... 30 图2.64 各层梯柱弯矩图 .................................................................................................... 30 图2.65 Y向地震作用下一至三层梯梁剪力和扭矩图 .................................................. 31 图2.66 塑性本构关系 ........................................................................................................ 34 图2.67 柱屈服面 ................................................................................................................ 34 图2.68 不同性能状态下位移的限制 ................................................................................ 34 图2.69 ATC-40中和GB50011-2001设计反应谱对比 ................................................. 35 图2.70 结构在8度多遇地震作用下各层位移的比较 .................................................... 36
图2.71 结构在8度罕遇地震作用下塑性铰分布对比 .................................................... 37 图2.72 结构在8度罕遇地震作用下各层位移的比较 .................................................... 38 图3.1 北川底框房屋（一驮五） ...................................................................................... 45 图3.2 汉旺镇底框房屋（一驮六） .................................................................................. 45 图3.3 都江堰底框房屋（一驮五） .................................................................................. 45 图3.4 都江堰底框房屋（一驮五） .................................................................................. 45 图3.5 都江堰某底层框架叠合塌落（9度区） ............................................................... 46 图3.6 都江堰某底层框架叠合塌落 .................................................................................. 46 图3.7 北川某底层框架叠合塌落（11度区） ................................................................. 46 图3.8 北川某底层框架叠合塌落 ...................................................................................... 46 图3.9 都江堰某底层框架底部侧移 .................................................................................. 47 图3.10 都江堰某底层框架底部侧移 ................................................................................ 47 图3.11 都江堰某底层框架底部侧移 ................................................................................ 47 图3.12 某底层框架底部侧移 ............................................................................................ 47 图3.13 某底层框架混凝土抗震墙破坏 ............................................................................ 48 图3.14 东汽职工宿舍楼底部抗震墙破坏 ........................................................................ 48 图3.15 都江堰底层框架砌体抗震墙破坏 ........................................................................ 48 图3.16 蓥华镇底层框架砌体抗震墙破坏 ........................................................................ 48 图3.17 广汉镇底层框架砌体抗震墙破坏 ........................................................................ 48 图3.18 蓥华镇底层框架砌体抗震墙破坏 ........................................................................ 48 图3.19 底层框架柱破坏 .................................................................................................... 49 图3.20 底层框架柱破坏 .................................................................................................... 49 图3.21 底层框架柱破坏 .................................................................................................... 49 图3.22 底层框架柱底产生塑性铰 .................................................................................... 49 图3.23 底层框架柱底压溃 ................................................................................................ 49 图3.24 底层框架柱顶压溃钢筋成灯笼状 ........................................................................ 49 图3.25 底层框架柱顶产生塑性铰 .................................................................................... 49 图3.26 汉旺镇某底层框架薄弱层转移 ............................................................................ 50 图3.27 二层砌体山墙处破坏 ............................................................................................ 50 图3.28 二层砌体纵向窗间墙破坏 .................................................................................... 51 图3.29 二层砌体纵向窗间墙破坏 .................................................................................... 51 图3.30 某底层框架薄弱层转移 ........................................................................................ 51 图3.31 广济镇某底层框架薄弱层转移 ............................................................................ 51 图3.32 汉旺镇底框房屋过渡层叠合塌落 ........................................................................ 51 图3.33 某底框房屋过渡层叠合塌落 ................................................................................ 51 图3.34 都江堰某底层框架梁端加腋 ................................................................................ 52