钢筋之应力-应变曲线.doc

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二 第一章绪论.............................................................................................1 1.1 前言..........................................................................1 1.2 研究动机............................................................................................2 1.3 研究目的............................................................................................3 第二章旧桥柱试体............................................................4 2.1 桥梁设计规范....................................................................................4 2.1.1 公路桥梁工程设计规范.............................................................4 2.1.2 公路桥梁耐震设计规范.............................................................5 2.2 圆形旧桥柱试体............7 2.2.1 试体设计...................................................................................7 2.2.2 BMCL100试验观察.................................................................9 2.2.3 BMCL50试验观察...................................10 2.2.4 BMC4试验观察.....................................................................11 2.2.5 圆形旧桥柱试体破坏状况比较.....................................14 2.2.6 圆形旧桥柱试体侧力-位移图比较................................15 2.2.7 圆形旧桥柱试体缺点...................................................15 第三章补强及修复设计.......................................................................17 3.1 前言..................................................................................................17 3.2 桥柱理论分析..................................................................................17 3.2.1 围束混凝土之应力-应变曲线..................................................17 3.2.2 纵向钢筋之应力-应变曲线......................................................24 3.2.3 断面分析...................................................................................26 3.3 RC包覆补强设计理论.....................................................31 3.3.1 剪力强度不足补强设计...........................................................31 3.3.2 桥柱韧性补强设计...................................................................38 3.3.3 避免桥柱主筋挫屈之补强设计...............................................42 3.3.4 桥柱主筋搭接长度不足之补强设计...............................43 3.3.5 主筋中断点附近之补强设计...................................................45 3.4 试体设计..........................................................................................47 3.4.1 补强试体设计...........................................................................48 三3.4.2 修复试体设计.............50 第四章试体施工与试验规划...............................................................53 4.1 施工..................................................................................................53 4.1.1 打毛..........................................53 4.1.2 绑钢筋.......................................................................................53 4.1.3 组钢模与灌浆...........................................................................55 4.2 试验布置...................................................56 4.2.1 施力系统装置...........................................................................56 4.2.2 试体装置...................................................................................57 4.2.3 量测系统装置............................................................57 4.3 试验程序..........................................................................................58 第五章补强试体与修复试体试验观察...............................................61 5.1 RCCL1试验观察..........................................................................61 5.2 RCCL2试验观察............62 5.3. RCC2试验观察.............................................................................63 5.4 BMCL50-RC试验观察.................................................................65 5.5 BMC4-RC试验观察..........................................66 第六章试验结果与讨论.......................................................................68 6.1 试体侧力-位移图.............................................................................68 6.2 试体侧力-位移图包络线.................................................................70 6.3 试体消能...71 6.4 补强试体侧力-位移图包络线与理论值之比较............................72 6.4.1 旧桥柱试体...............................................................................72 6.4.2 补强试体....................................................72 6.4.3 修复试体...................................................................................73 6.5 弯矩消能与总消能之比较..............................................................73 6.6 桥柱试体曲率观察..........................................................................74 第七章结论与展望...............................................................................75 7.1 结论..................................................................................................75 7.2 建议与展望......................................................................................76 参考文献..78 四 表2.1 圆形标准桥柱试体设计规格表...................................................80 表3.1a BMCL100试体箍筋设计表....................................................81 表3.1b BMCL100试体箍筋设计表.............................82 表3.2a BMC4试体箍筋设计表..........................................................83 表3.2b BMC4试体箍筋设计表..........................................................84 表3.3 圆形桥柱补强及修复试体设计规格表.......................................85 表6.1 桥柱试体强度、劲度、韧性及总消能..................................86 五 图2.1 BMCL100试体设计图................................................................87 图2.2 BMCL50试体设计图..................................................................88 图2.3 BMC4试体设计图.......................................................................89 图2.4 BMCL100侧力-位移图...............90 图2.5 BMCL50侧力-位移图.................................................................90 图2.6 BMC4侧力-位移图......................................................................91 图3.1 Mander et al. 理论之混凝土应力-应变曲线..............................92 图3.3 圆形桥柱断面受围束示意图.......................................................92 图3.3 圆形桥柱断面围束力示意图.......................................................93 图3.4 Saatcioglu and Razvi 之围束混凝土应力-应变曲线.................93 图3.5 Hoshikuma et al. 之围束混凝土应力-应变曲线.......................94 图3.6 钢筋之应力-应变曲线 Mirza and MacGregor......94 图3.7 断面分析法受力示意图...............................................................95 图3.8 断面分析法程式与补强设计流程图...........................................96 图3.9 断面之弯矩-曲率曲线.................................................................97 图3.10 悬臂式桥柱之侧向位移................................97 图3.11 a 植筋RC包覆补强示意图....................................................98 图3.11 b 无植筋RC包覆补强示意图................................................98 图3.12 圆柱及矩形柱之RC包覆补强示意图.....................................99 图3.13 桥柱单向与双向弯曲示意图.........................................100 图3.14 桥柱之横向钢筋有效剪力.......................................................100 图3.15 轴向力对桥柱剪力之关系.......................................................101 图3.16 桥柱剪力破坏模式...................................................................101 图3.17 圆形桥柱RC包覆补强.................................102 图3.18 钢筋双模数示意图...................................................................102 图3.19 钢筋搭接所需之围束力示意图...............................................103 图3.20 桥柱主筋搭接破坏模式...........................................................103 图3.21 桥柱主筋断筋位置图.....................104 图3.22 BMCL100之剪力-位移韧性比关系图Mander....................105 图3.23 BMCL100之剪力-位移韧性比关系图Saatcioglu...............105 六图3.24 BMCL100之剪力-位移韧性比关系图Hoshikuma..............106 图3.25 BMC4之剪力-位移韧性比关系图Mander..........................106 图3.26 BMC4之剪力-位移韧性比关系图Saatcioglu..107 图3.27 BMC4之剪力-位移韧性比关系图Hoshikuma....................107 图3.28 RCCL1试体设计图.................................................................108 图3.29 RCCL2、RCC2、BMC4-RC、BMCL50-RC试体设计图....109 图4.1 试验装置示意图.........................................................................110 图4.2 反覆载重试验位移历时图..........................................................111 图6.1 RCCL1侧力-位移图..................................................................112 图6.2 RCCL2侧力-位移图..................................................................112 图6.3 RCC2侧力-位移图...................................113 图6.4 BMC4-RC侧力-位移图.............................................................113 图6.5 BMCL50-RC侧力-位移图........................................................114 图6.6 BMCL100补强前后之侧力-位移包络线.................................114 图6.7 BMC4补强及修复前后之侧力-位移包络线.............115 图6.8 BMCL50修复前后之侧力-位移包络线...................................115 图6.9 BMCL100补强前后各位移之消能图......................................116 图6.10 BMCL100补强前后之总消能图............................................116 图6.11 BMC4补强及修复前后各位移之消能图...............................117 图6.12 BMC4补强及修复前后之总消能图...117 图6.13 BMCL50修复前后各位移之消能图......................................118 图6.14 BMCL50修复前后之总消能图..............................................118 图6.15 BMC4理论与试验值比较图...................................................119 图6.16 BMCL100理论与试验值比较图............................119 图6.17 BMCL50理论与试验值比较图..............................................120 图6.18 RCCL1理论与试验值比较图.................................................120 图6.19 RCCL2理论与试验值比较图.................................................121 图6.20 RCC2理论与试验值比较图............................................121 图6.21 BMC4-RC理论与试验值比较图............................................122 图6.22 BMCL50-RC理论与试验值比较图........................................122 图6.23 BMC4弯矩消能与总消能比较图...........................................123 图6.24 BMCL50弯矩消能与总消能比较图......................................123 七图6.25 RCC2弯矩消能与总消能比较图............................................124 图6.26 BMC4-RC弯矩消能与总消能比较图....................................124 图6.27 BMCL50-RC弯矩消能与总消能比较图................................125 图6.28 BMC4柱身曲率变化图...........................................................125 图6.29 BMCL50柱身曲率变化图......................126 图6.30 RCC2柱身曲率变化图............................................................126 图6.31 BMC4-RC柱身曲率变化图....................................................127 图6.32 BMCL50-RC柱身曲率变化图................................................127 八 照片2.1 BMCL100东侧破坏状况............128 照片2.2 BMCL100西侧破坏状况......................................................128 照片2.3 BMCL50东侧破坏状况........................................................129 照片2.4 BMCL50西侧破坏状况........................................................129 照片2.5 BMC4东侧破坏状况.....130 照片2.6 BMC4西侧破坏状况.............................................................130 照片5.1 RCCL1东侧破坏情况...........................................................131 照片5.2 RCCL1西侧破坏情况...........................................................131 照片5.3 RCCL2东侧破坏情况...........................................................132 照片5.4 RCCL2西侧破坏情况...........................................................132 照片5.5 RCC2东侧破坏情况..............................................................133 照片5.6 RCC2西侧破坏情况.........................................133 照片5.7 BMCL50-RC东侧破坏情况..................................................134 照片5.8 BMCL50-RC西侧破坏情况..................................................134 照片5.9 BMC4-RC东侧破坏情况......................................................135 照片5.10 BMC4-RC西侧破坏情况............................135
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