Structural Performance of Reinforced Concrete Frame with cast-in-place non-structural wall

通过对一层现浇钢筋混凝土框架的剪力荷载试验，分析了现浇钢筋混凝土框架的结构性能。采用二维非线性有限元法（FEM）分析，阐明现浇非结构墙框架的抗剪机理，掩盖试验结果。(1)试验两个试件的比例尺为1/3，为现浇非结构墙框架。柱截面为240mmx240mm，梁截面为800mmx600mm，柱高1100mm，梁的净跨即RC墙长度为1760mm。变量是柱的抗剪配筋，肩梁的厚度。通过对配梁进行设计，观察配梁厚度在各加载方向（正循环和负循环）下对柱性能的影响。测试结果如下：1)即使是现浇无预应力混凝土框架，通过增加柱的抗剪配筋，其破坏模式也由柱的剪切破坏转变为柱的受弯屈服。此外，通过增加抗剪配筋，可以提高延性。2)带拱肩柱延性随拱肩变薄而提高。结果表明，当拱肩较薄时，拱肩受压破坏使带拱柱由短柱变为长柱。因此，为获得柱的延性，开展柱顶抗压破坏研究具有重要意义。(2)有限元分析分析的试样形状与试验(1)相同，分析结果与试验结果一致。为了补偿试验结果，进行了参数分析。该分析方法有助于阐明现浇非结构墙框架的抗剪机理。结合试验结果和分析结果，阐明了钢筋混凝土框架和非结构墙体的抗剪机理。在此基础上，提出了利用抗剪机理预测非结构剪力墙框架结构性能（荷载-位移关系）的方法。计算结果与试验结果在刚度、刚度减小、承载力和抗弯承载力减小等方面吻合较好。计算结果与分析结果吻合较好。对柱和非结构墙的破坏模式进行了合理判断。因此，控制现浇非结构钢筋混凝土墙的破坏模式，积极地将现浇非结构钢筋混凝土墙应用于抗震设计是可能的。少

The shear-loading test for one-story RC frames with cast-in-place non-structural walls (spandrels) was conducted to suggest the structural performance of the RC frame with spandrels. The Finite Element Method (FEM) analysis, 2D non-liner, was conducted to clarify the shear resistant mechanism of the RC frame with cast-in-place non-structural RC wall, and to cover the test result.(1)TestTwo specimens with a scale of 1/3 was a frame with cast-in-place non-structural wall. The section of columns was 240mmx240mm, the section of beams was 800mmx600mm, the height of column was 1100mm, and the clear span of beam, the length of RC walls, was 1760mm. The variables were the shear reinforcement of the column, the thickness of spandrels. The spandrels were planned to observe the influence to the behavior of the column of the thickness of spandrels on each direction of loading (plus cycle and minus cycle).The result of test is bellow;1)Even if it is in case of the RC frame with cast-in-place non-st … More ructural walls, the failure mode changed from shear failure of column to the flexural yield of column by increasing the shear reinforcement of the column. Moreover, by increasing the shear reinforcement, the ductility was improved.2)The ductility of column with spandrel was improved as the spandrel became thin. The compressive failure of spandrel was observed, when the spandrel is thin, and the column with spandrel was changed from the short column to the long column by the compressive failure of spandrel. Therefore, it is important to develop the compressive failure of spandrel in order to obtain the ductility of column.(2)FEM analysisThe specimen of analysis is the same shape as the test (1), and the analytical results agreed with test results. The parametric analysis was conducted in order to compensate tests. The analytical method is useful to clarify the shear resistant mechanism of a RC frame with cast-in-place non-structural RC walls.The shear resistant mechanism of RC frames and non-structural RC walls was clarified with test results and analytical results. Still more, this paper propose the method to predict the structural performance (the load-displacement relationship) of RC frames with non-structural RC walls by the shear resistant mechanisms. Good agreement between the calculation and the test can be seen in the stiffness, the decrease of stiffness, capacities and the decrease of flexural capacity. Similarly, the calculation result is in agreement with the analysis result. Also, the failure mode of column and non-structural wall was appropriately judged. So, it is possible to control the failure mode of cast-in-place non-structural RC walls and to use, the cast-in-place non-structural RC walls to a seismic design positively. Less