钢筋混凝土双连梁短肢剪力墙结构试验研究
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摘要
为了研究混凝土材料随机性对结构反应的影响,进行了4片相同的4层1∶3缩尺模型的双连梁短肢剪力墙结构非线性全过程试验研究.为了使各试件彼此相同,消除其他不确定因素的影响,在结构设计、材料配制、模型施工以及加载制度等方面进行了严格的控制.试验获得了荷载-位移曲线、混凝土和钢筋的应变曲线以及墙体局部相对位移曲线.从水平承载力、侧向刚度、位移延性3个方面对比分析了各片墙体的反应,研究了结构应变、位移的变异性特征,给出了典型横截面受力状态的变化过程,分析了各试件在破坏特征上的差异性.研究结果表明,混凝土随机性与非线性的耦合效应对结构反应所造成的影响不可忽视.
Pseudo static tests are conducted on the same four four-story 1∶3 scaled short-leg shear wall specimens with dual binding beams in a bid to investigate how concrete stochastic characteristic affects the structural responses.Structure design,material preparation,specimen construction and loading system are fabricated strictly so as to eliminate other uncertain factors.Load-displacement curves,strain curves and partial relative displacement curves are obtained.Moreover,the bearing capacity,stiffness,and ductility are discussed.Strains variability,displacements variability and redistributed inner forces behavior of three typical cross-sections are studied.Finally,failure characteristic of different specimens is contrasted.It is concluded that coupling of concrete randomicity and non-linearity has notable effects on structural responses.
Pseudo static tests are conducted on the same four four-story 1∶3 scaled short-leg shear wall specimens with dual binding beams in a bid to investigate how concrete stochastic characteristic affects the structural responses.Structure design,material preparation,specimen construction and loading system are fabricated strictly so as to eliminate other uncertain factors.Load-displacement curves,strain curves and partial relative displacement curves are obtained.Moreover,the bearing capacity,stiffness,and ductility are discussed.Strains variability,displacements variability and redistributed inner forces behavior of three typical cross-sections are studied.Finally,failure characteristic of different specimens is contrasted.It is concluded that coupling of concrete randomicity and non-linearity has notable effects on structural responses.
引文
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[3]李杰.混凝土随机损伤本构关系研究新进展[J].东南大学学报:自然科学版,2002,32(5):750.LI Jie.Recent research progress on the stochastic damageconstitutive law of concrete[J].Journal of SoutheastUniversity:Natural Science,2002,32(5):750.
[4]丁光莹,李杰.混凝土框架结构非线性静力分析的随机模拟[J].同济大学学报:自然科学版,2003,31(4):389.DING Guangying,Li Jie.Random simulation study onnonlinear static performance of reinforced concrete framestructure[J].Journal of Tongji University:Natural Science,2003,31(4):389.
[5]余志武,周凌宇,罗小勇.钢部分预应力混凝土连续组合梁内力重分布研究[J].建筑结构学报,2002,23(6):64.YU Zhiwu,ZHOU Lingyu,LUO Xiaoyong.Study on momentredistribution of steel-partially prestressed concrete compositecontinuous ceams[J].Journal of Building Structure,2002,23(6):64.
[6]宋建学,刘立新,彭少民.低周反复试验中短肢墙应变分布演化过程研究[J].世界地震工程,2002,18(1):77.SONG Jianxue LIU Lixin,PENG Shaomin.A research onstrain distribution evolution process of short-limbed wallstructure under horizontal cyclic loading[J].World EarthquakeEngineering,2002,18(1):77.
[7]黄吉锋,李云贵,邵弘,等.考虑弹塑性内力重分配的框剪结构等剪应力调整[J].建筑科学,2005,21(3):1.HUANG Jifeng,LI Yungui,SHAO Hong,et al.On theuniform shearing stress regulations of the frame-shear wallstructure considering the re-distribution of the elastic-plasticinternal forces[J].Building Science,2005,21(3):1.
[8]容柏生.高层住宅建筑中的短肢剪力墙结构体系[J].建筑结构学报,1997,18(6):14.RONG Baisheng.Short-leg shear wall structural system usedin tall residential buildings[J].Journal of Building Structure,1997,18(6):14.
[9]中华人民共和国建设部.JGJ 3─2002高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.Ministry of Construction of the People’s Republic of China.JGJ 3─2002 Technical specification for concrete structures oftall building[S].Beijing:China Architecture and BuildingPress,2002.
[10]李奎明,孙春毅,李杰.高性能混凝土双连梁短肢剪力墙试验研究[J].地震工程与工程振动,2006,26(3):121.LI Kuiming,SUN Chunyi,LI Jie.Experimental study on HPCshort-leg shear wall with a pair of beams[J].EarthquakeEngineering and Engineering Vibration,2006,26(3):121.
[11]WU J Y,LI J,Faria R.An energy release rate-based plasticdamage model for concrete[J].International Journal of Solidsand Structures,2006,43(3-4):583.
[12]中华人民共和国建设部.GB 50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.Ministry of Construction of the People’s Republic of China.GB 50010—2002 Code for design of concrete structures[S].Beijing:China Architecture and Building Press,2002.
[13]过镇海,张秀琴,张达成,等.混凝土应力-应变全曲线的试验研究[J].建筑结构学报,1982,3(1):1.GUO Zhenhai,ZHANG Xiuqin,ZHANG Dacheng,et al.Experimental investigation of complete stress-deformationcurves of concrete in tension[J].Journal of BuildingStructures,1982,3(1):1.
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