型鋼韌性混凝土短梁抗剪性能試驗(yàn)研究
[Abstract]:Due to the requirement of architectural layout, the structural form of supporting column transfer beam is often appeared. Because of the large vertical load, the section height of the transfer beam is larger, the span height is smaller, and the short beam is easy to be formed. Steel reinforced concrete beams have higher bearing capacity and better seismic performance, but the brittleness of concrete makes the shear problem of short steel reinforced concrete beams not well solved, and the shear theory and calculation methods are not perfect. The appearance of DFRC makes up for the brittleness of ordinary concrete. In this paper, according to the scale of 1: 20 / 3, a steel reinforced concrete transfer beam (SRC),) and a steel ductile concrete transfer beam (SRD),) are designed and fabricated, and three short concrete beams and six DFRC beams are designed separately. In order to study the shear behavior of DFRC short beam. Through the static test of 11 beam specimens, the whole process from the beginning loading to the final failure is observed, and the characteristic points such as cracking load and ultimate load are determined, and the development of cracks is recorded. Load-deflection curve and strain trend of steel bar. In this paper, the shear mechanical properties of (SRDFRC) short beam with steel reinforced ductile concrete are studied, the failure mode and shear bearing capacity of SRDRFC beam under different shear span ratio are analyzed, and a theoretical formula of shear resistance for DFRC short beam is established by using the compression-pull bar model. Based on the regression analysis of test data and referring to the relevant codes of China, a new formula for calculating the shear capacity of DFRC beams is put forward. The calculated values are in good agreement with the test results.
【學(xué)位授予單位】:西安建筑科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TU398.9
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