钢筋混凝土框架梁-剪力墙平面外连接节点的力学分析
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摘要
应用正交各向异性弹性薄板理论分析了钢筋混凝土剪力墙在框架梁传递来的平面外弯矩作用下的力学行为,得到了节点的转动刚度和墙体有效计算宽度的解析表达式;引入了"等效框架"分析模型,将节点区附近有效计算宽度范围内的墙体视为一等效框架柱进行分析即可反映节点的平面外转动刚度问题;并将理论解与ANSYS有限元解进行比较,结果符合较好;对实际工程情况进行了算例分析。计算结果表明:框架梁-剪力墙平面外连接节点的转动刚度较大,还不能达到可以忽略的程度。
Based on the orthotropic elastic thin plate theory,the mechanical performance of shear wall subjected to non-planar bending moment acting from the beam was studied.The analytical solutions for rotational stiffness of the joint and effective width of the wall were obtained.An equivalent frame model was introduced.The out-of-plane rotational stiffness of the joint can be derived by assuming that an effective width of wall near the joint was acted as an equivalent column.The theoretical results were compared with the finite element results obtained by ANSYS and good agreements were found.Based on practical engineering situation,the results of calculation show that the rotational stiffness of the non-planar beam-wall joint is not small enough to be neglected.
Based on the orthotropic elastic thin plate theory,the mechanical performance of shear wall subjected to non-planar bending moment acting from the beam was studied.The analytical solutions for rotational stiffness of the joint and effective width of the wall were obtained.An equivalent frame model was introduced.The out-of-plane rotational stiffness of the joint can be derived by assuming that an effective width of wall near the joint was acted as an equivalent column.The theoretical results were compared with the finite element results obtained by ANSYS and good agreements were found.Based on practical engineering situation,the results of calculation show that the rotational stiffness of the non-planar beam-wall joint is not small enough to be neglected.
引文
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[12]徐芝纶.弹性力学[M].北京:高等教育出版社,1990.XU Zhi-lun.Mechanics of Elasticity[M].Beijing:Higher Education Press,1990.
[13]DAVID A P.Slab Effective Width for EquivalentFrame Analysis[J].ACI Journal Proceedings,1975,72(3):135-137.
[14]GB 50010—2002,混凝土结构设计规范[S].GB 50010—2002,Code for Design of Concrete Struc-tures[S].
[2]张建仁,王磊.既有钢筋混凝土桥梁构件承载力估算方法[J].中国公路学报,2006,19(2):49-55.ZHANG Jian-ren,WANG Lei.Estimated Approach toCarrying Capacity of Existing Reinforced ConcreteBridge Member[J].China Journal of Highway andTransport,2006,19(2):49-55.
[3]王锁军,王元清,吴杰,等.组合梁刚度对组合框架的抗震性能影响分析[J].建筑科学与工程学报,2006,23(1):39-44.WANG Suo-jun,WANG Yuan-qing,WU Jie,et al.A-nalysis of Composite Beam Rigidity Influencing Seis-mic Properties of Composite Frame[J].Journal of Ar-chitecture and Civil Engineering,2006,23(1):39-44.
[4]刘哲锋,沈蒲生,龚胡广.基于拟力法的框架结构静力弹塑性分析[J].建筑科学与工程学报,2006,23(3):32-36.LIU Zhe-feng,SHEN Pu-sheng,GONG Hu-guang.Static Elastic-plastic Analysis of Frame StructureBased on Force Analogy Method[J].Journal of Archi-tecture and Civil Engineering,2006,23(3):32-36.
[5]沈蒲生,刘杨.水平地震作用下框支剪力墙结构的变形研究[J].建筑科学与工程学报,2005,22(1):58-63.SHEN Pu-sheng,LIU Yang.Distortion Research ofShear Wall Structure Supported on Frame UnderEarthquake Actions[J].Journal of Architecture andCivil Engineering,2005,22(1):58-63.
[6]刘伯权,潘元.框架-抗震墙结构抗震墙抗弯刚度的优化研究[J].建筑科学与工程学报,2005,22(1):55-57.LIU Bo-quan,PAN Yuan.Study on Optimum BendingRigidity of Seismic Wall in Frame-shear Wall Struc-ture[J].Journal of Architecture and Civil Engineer-ing,2005,22(1):55-57.
[7]郑琪.钢筋混凝土梁墙节点抗震性能的初步研究[J].北京建筑工程学院学报,2001,17(增):48-51.ZHENG Qi.Primary Researches of the Joint of Rein-forced Concrete Wall and Beam[J].Journal of BeijingInstitute of Civil Engineering and Architecture,2001,17(S):48-51.
[8]杨华,钱稼茹,赵作周.钢筋混凝土梁-墙平面外连接节点试验[J].建筑结构学报,2005,26(4):19-26.YANG Hua,QIAN Jia-ru,ZHAO Zuo-zhou.Experi-mental Study of Reinforced Concrete Non-planarBeam-wall Connections[J].Journal of Building Struc-tures,2005,26(4):19-26.
[9]KWAN A K H,CHAN W T.Non-planar Beam WallJoints in Tall Building Structures[J].Proceedings ofthe Institution of Civil Engineering,Structures andBuildings,2000,140(2):73-83.
[10]JGJ 3—2002,高层建筑混凝土结构技术规程[S].JGJ 3—2002,Technical Specification for ConcreteStructures of Tall Building[S].
[11]孔丹丹,赵颖华,王萍,等.钢筋混凝土材料有限元分析中的等效模量方法[J].沈阳建筑大学学报:自然科学版,2005,21(3):200-203.KONG Dan-dan,ZHAO Ying-hua,WANG Ping,et al.Equivalent Moduli Method in the Finite ElementAnalysis of Reinforced Concrete Structures[J].Jour-nal of Shenyang Jianzhu University:Natural Science,2005,21(3):200-203.
[12]徐芝纶.弹性力学[M].北京:高等教育出版社,1990.XU Zhi-lun.Mechanics of Elasticity[M].Beijing:Higher Education Press,1990.
[13]DAVID A P.Slab Effective Width for EquivalentFrame Analysis[J].ACI Journal Proceedings,1975,72(3):135-137.
[14]GB 50010—2002,混凝土结构设计规范[S].GB 50010—2002,Code for Design of Concrete Struc-tures[S].
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