钢筋之应力应变曲线.docx

钢筋之应力应变曲线.docx

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钢筋之应力应变曲线

二第一章绪论.............................................................................................11.1前言....................................................................................................11.2研究动机............................................................................................21.3研究目的............................................................................................3第二章旧桥柱试体.................................................................................42.1桥梁设计规范....................................................................................42.1.1公路桥梁工程设计规范.............................................................42.1.2公路桥梁耐震设计规范.............................................................52.2圆形旧桥柱试体................................................................................72.2.1试体设计...................................................................................72.2.2BMCL100试验观察.................................................................92.2.3BMCL50试验观察.................................................................102.2.4BMC4试验观察.....................................................................112.2.5圆形旧桥柱试体破坏状况比较.....................................142.2.6圆形旧桥柱试体侧力-位移图比较................................152.2.7圆形旧桥柱试体缺点....................................................15第三章补强及修复设计.......................................................................173.1前言..................................................................................................173.2桥柱理论分析..................................................................................173.2.1围束混凝土之应力-应变曲线..................................................173.2.2纵向钢筋之应力-应变曲线......................................................243.2.3断面分析...................................................................................263.3RC包覆补强设计理论...................................................................313.3.1剪力强度不足补强设计...........................................................313.3.2桥柱韧性补强设计...................................................................383.3.3避免桥柱主筋挫屈之补强设计...............................................423.3.4桥柱主筋搭接长度不足之补强设计.......................................433.3.5主筋中断点附近之补强设计...................................................453.4试体设计..........................................................................................473.4.1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...............................................................534.1施工..................................................................................................534.1.1打毛...........................................................................................534.1.2绑钢筋.......................................................................................534.1.3组钢模与灌浆...........................................................................554.2试验布置..........................................................................................564.2.1施力系统装置...........................................................................564.2.2试体装置...................................................................................574.2.3量测系统装置...........................................................................574.3试验程序..........................................................................................58第五章补强试体与修复试体试验观察...............................................615.1RCCL1试验观察..........................................................................615.2RCCL2试验观察..........................................................................625.3.RCC2试验观察.............................................................................635.4BMCL50-RC试验观察.................................................................655.5BMC4-RC试验观察.....................................................................66第六章试验结果与讨论.......................................................................686.1试体侧力-位移图.............................................................................686.2试体侧力-位移图包络线.................................................................706.3试体消能..........................................................................................716.4补强试体侧力-位移图包络线与理论值之比较............................726.4.1旧桥柱试体...............................................................................726.4.2补强试体...................................................................................726.4.3修复试体...................................................................................736.5弯矩消能与总消能之比较..............................................................736.6桥柱试体曲率观察..........................................................................74第七章结论与展望...............................................................................757.1结论..................................................................................................757.2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3.1aBMCL100试体箍筋设计表....................................................81表3.1bBMCL100试体箍筋设计表....................................................82表3.2aBMC4试体箍筋设计表..........................................................83表3.2bBMC4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2.1BMCL100试体设计图................................................................87图2.2BMCL50试体设计图..................................................................88图2.3BMC4试体设计图.......................................................................89图2.4BMCL100侧力-位移图...............................................................90图2.5BMCL50侧力-位移图.................................................................90图2.6BMC4侧力-位移图......................................................................91图3.1Manderetal.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3.4SaatciogluandRazvi之围束混凝土应力-应变曲线.................93图3.5Hoshikumaetal.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 MirzaandMacGregor.........................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3.11a植筋RC包覆补强示意图....................................................98图3.11b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3.22BMCL100之剪力-位移韧性比关系图Mander....................105图3.23BMCL100之剪力-位移韧性比关系图Saatcioglu...............105六图3.24BMCL100之剪力-位移韧性比关系图Hoshikuma..............106图3.25BMC4之剪力-位移韧性比关系图Mander..........................106图3.26BMC4之剪力-位移韧性比关系图Saatcioglu......................107图3.27BMC4之剪力-位移韧性比关系图Hoshikuma....................107图3.28RCCL1试体设计图.................................................................108图3.29RCCL2、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6.1RCCL1侧力-位移图..................................................................112图6.2RCCL2侧力-位移图..................................................................112图6.3RCC2侧力-位移图....................................................................113图6.4BMC4-RC侧力-位移图.............................................................113图6.5BMCL50-RC侧力-位移图........................................................114图6.6BMCL100补强前后之侧力-位移包络线.................................114图6.7BMC4补强及修复前后之侧力-位移包络线...........................115图6.8BMCL50修复前后之侧力-位移包络线...................................115图6.9BMCL100补强前后各位移之消能图......................................116图6.10BMCL100补强前后之总消能图............................................116图6.11BMC4补强及修复前后各位移之消能图...............................117图6.12BMC4补强及修复前后之总消能图.......................................117图6.13BMCL50修复前后各位移之消能图......................................118图6.14BMCL50修复前后之总消能图..............................................118图6.15BMC4理论与试验值比较图...................................................119图6.16BMCL100理论与试验值比较图............................................119图6.17BMCL50理论与试验值比较图..............................................120图6.18RCCL1理论与试验值比较图.................................................120图6.19RCCL2理论与试验值比较图.......................