【作者】 杨璐；

【导师】 吴方伯；

【作者基本信息】 湖南大学 ， 结构工程， 2014， 硕士

【摘要】 现浇保温复合剪力墙是一种新型的复合墙体，与以往的复合墙体的相同之处在于：都是由内外两侧混凝土层、中间聚苯板保温层三层构成，然后由连接件连接内外层的混凝土，不同之处在于：聚苯板上面开有孔洞，并在孔洞中布置加强筋；施工时，混凝土填充孔洞中的空间并包裹着加强筋，形成钢筋混凝土短柱，更好地连接聚苯板两侧的混凝土层。该复合剪力墙兼有节能、轻质、造价低廉、受力性能良好、有市场发展前景等优点。本文对该现浇保温剪力墙进行基本力学性能研究，主要研究内容及成果如下：(1)进行三个该复合剪力墙试块在竖向荷载作用下的剪切试验，记录三个试块在各自荷载作用下聚苯板保温层与两侧混凝土的相对位移及试块随着荷载而加大时的变形破坏特征，绘制了荷载滑移曲线，计算了承载力并与理论值加以比较。分析表明，连接内外层混凝土的钢筋混凝土短柱在竖向剪切荷载作用下的变形经过弹性阶段-弹塑性阶段-塑性阶段，且钢筋混凝土短柱在抵抗内外层混凝土之间的剪切力上面起到很好的作用，内外层混凝土层能协同工作，共同受力。(2)进行三片该复合墙体轴心受压性能试验，通过对现浇保温剪力墙施加均布轴心荷载，考察墙体在轴心受压时的破坏过程与破坏形态，记录墙体的开裂荷载与极限荷载、混凝土与钢筋的应变随着外加荷载而增大的变化规律。结果表明：加强筋能够抵抗由于墙体内外侧混凝土要分离或压并而产生的拉应力或压应力，不至于使内外两层混凝土分离或压碎；初步推测该现浇复合剪力墙的轴心受压承载力与相同混凝土厚度的实心墙的承载力相当。(3)根据静载试验，用有限元分析软件ANSYS对现浇保温复合剪力墙进行从加载到破坏的全过程模拟，并与试验结果进行比较分析；同时建立对比模型，并与现有的复合墙体进行比较，论证试验有关结论的正确性及有限元分析的可行性，由此得到：该复合墙体的破坏是由于混凝土达到极限应变后混凝土被压碎而引起的；证实关于轴心受压承载力公式推测的正确性，采用Nu=0.9(f c A+f y ’ As’)计算轴心抗压承载力是可行的。更多还原

【Abstract】 Cast-in-situ insulation composite shear wall is a new type of sandwish wall. Thesimilarity between it and the previous composite wall is that they are both comprisedof three layers: the internal and external concrete, the middle insulation layer, andthen through the connecting members, the two concrete layers behave as a whole.However, the difference is that there is holes in the insulation layer, which areinforcing bar goes through the hole. When constructing, the short reinforced concretecolumns has been formed since concrete fills in holes and wrap the stiffeners, whichenables a better connection between the two sides of the concrete. The composite shearwall characterizes with energy saving, light weight, low cost, good mechanicalperformance, market prospect etc.This paper studys on the mechanical properties of the cast-in-situ insulationcomposite shear wall, the main research contents and results are as follows:(1)Three sandwish blocks’ shear experiment were tested under vertical load, andrelative displacement between insulation layer and the two concrete layers wasrecorded, deformation characteristics with load increasing was observed, load-slipcurves was drew, then the calculated bearing capacity of the specimens was comparewith the theoretical value, which shows that, the deformation of the short reinforcedconcrete column, which connecting internal and external concrete layer, goes throughelastic-elastic-plastic-plastic stage under vertical shear load, thus the shortreinforced concrete column plays a very good role in the resistance of the shear stressbetween the inner and outer layer of concrete, the two layers of concrete can worktogether.(2)Three pieces of the composite wall’s axially compressive experiment wascarried out, so based on the failure process and failure feature, the cracking load andultimate load, the variation of concrete and steel’s stress and strain as the applied loadwas increasing, we can know that the reinforcing bar can resist the tensile stress orcompressive stress caused by the internal and external concrete layers if they are goingto separate or pressure together, so that the two layers of inner and outer concrete willnot be separated or crushed; Preliminary speculated that the axially loaded capacity ofcast-in-situ composite shear wall is equal to the same concrete thickness of the solidwall. (3)According to the static load test, the finite element analysis software ANSYSwas used to simulate the whole process of the cast-in-situ insulation composite shearwall from loading to destroy, and the simulated results were compared with the testfindings; Contrast models were set up and compared with the existing composite wallat the same time to demonstration the correctness of relevant experimental conclusionand the feasibility of the finite element analysis, which shows that after reaching theultimate strain, concrete is crushed,which leads in the destruction of the compositewall， and which confirms about the correctness of the speculated axially compressivecapacity formula, using Nu=0.9(fcA+fy’ As’)to calculate axially loaded strength isfeasible.更多还原