现场发泡夹心墙内外叶墙协同工作性能

为研究现场发泡夹心墙的稳定性、钢筋混凝土挑耳和拉接件参与变形能力、夹心墙的破坏形态和受力性能，寻求改善墙体的变形能力和整体性能的有效手段。制作了13片发泡夹心墙和1片实心墙，进行了平面内的抗震性能试验，分析了一些构造措施对墙体受力性能和变形性能的影响，并分析了竖向压力和保温层厚度对相对位移差的影响，最后，分析了钢筋混凝土梁挑耳和拉接件对协调内外叶墙体工作的能力。试验研究结果表明构造柱的存在可以有效改善墙体的变形能力，并且现场发泡保温浆料具有较高的黏结强度、抗剪强度和抗压强度，对墙体承栽力有一定有利影响。钢筋混凝土梁挑耳在加强内外叶墙连接中起主要作用，而且在保证外叶墙平面外稳定性方面也起主要作用。当墙体严重破坏开裂时，拉接件可以起到对墙体支撑或拉接的作用，有效防止墙面倒塌掉落。拉接件与钢筋混凝土挑耳在夹心墙中分工不同，是协调夹心墙内外叶墙体工作的主要构造措施，应合理设计使各自充分发挥作用。

Interaction Working Behavior About the Internal and External Wall of Foam-in-place Cavity Wall

In order to study the stability of foam-in-place cavity wall, the capacity of reinforced concrete strip ear and tie involving in cavity wall deformation, the broken shapes and mechanical performance of the cavity wall, the effective measures was seaked to improve deformation capacity and overall performance of the cavity wall. 13 patches of cavity wall and 1 patch of solid wall were built and seismic tests of which were carried out. The Influence of some constructional measures on mechanical behavior and deformation properties of the wall and vertical pressure and insulation layer thickness on the relative displacement difference of the internal and external wall of foam-in-place cavity wall was analyzed. Finally, the capability of reinforced concrete strip ear and tie working interactively between the internal and external wall of foam- in-place cavity wall was analyzed. It is found that deformation capacity of the cavity wall is improved efficiently with constructional column and the high bonding strength, shearing strength and pressure strength of foam-in-place insulating mortar have certainly a positive influence on the bearing capacity of the wall. The reinforced concrete strip ears play the leading role in reinforcing connection of the internal and external wall of foam-in-place cavity wall and guaranteeing out-plane stability of the external wall. When walls crack seriously, the ties can play an important role in supporting and drawing the wall and preventing wall collapse. Furthermore, the reinforced concrete strip ears and ties which are the main construction measures to coordinate the internal and external wall work together perform a great variety of tasks. Therefore, the reinforced concrete strip ears and ties should be designed rationally to guarantee playing their respective roles.