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

现浇非结构墙体钢筋混凝土框架结构性能

基本信息

批准号：
13650641
负责人：
NAKANO Katsuhiko
金额：
$ 1.54万
依托单位：
Tokyo University of Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

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

进行了单层钢筋混凝土现浇非结构墙框架的抗剪试验，研究了带跨钢筋混凝土框架的结构性能。为了阐明现浇非结构墙体框架的抗剪机理，并对试验结果进行了二维非线性有限元分析。(1)两个试件比例为1/3的试件为现浇非结构墙体框架。柱的截面为240 mm×240 mm，梁的截面为800 mm×600 mm，柱高为1100 mm，梁的净跨度为1760 mm，即RC墙的长度。变量为柱的抗剪配筋、跨梁厚度。试验结果表明：1)即使是现浇非st…的钢筋混凝土框架，其受力性能也是如此结构墙体越多，随着配筋率的增加，破坏模式由柱的剪切破坏转变为柱的弯曲屈服。此外，通过增加受剪钢筋，提高了延性。2)带腹板柱的延性随着腹板变薄而得到改善。当侧墙较薄时，侧墙发生受压破坏，侧墙受压破坏由短柱变为长柱。有限元分析：分析试件与试验(1)试件形状相同，分析结果与试验结果吻合较好。为了补偿试验，进行了参数分析。该分析方法有助于阐明现浇非结构钢筋混凝土墙框架的抗剪机理。通过试验结果和分析结果，明确了钢筋混凝土框架和非结构钢筋混凝土墙的抗剪机理。此外，本文还提出了利用抗剪机制预测非结构钢筋混凝土框架结构性能(荷载-位移关系)的方法。计算结果与试验结果吻合较好，表现为刚度下降、刚度下降、承载能力下降和抗弯承载力下降。同样，计算结果与分析结果吻合较好。并对柱和非结构墙体的破坏模式进行了适当的判断。因此，有可能控制现浇非结构钢筋混凝土墙的破坏模式，将现浇非结构钢筋混凝土墙用于抗震设计。较少