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Effects of Cover Thickness on the Punching Shear Strength of Reinforced Concrete Slabs
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Science & Technology Review | 2014, 32(36) : 93 - 97
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Science & Technology Review | 2014, 32(36): 93-97
Effects of Cover Thickness on the Punching Shear Strength of Reinforced Concrete Slabs
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YANG Qiuning, MAO Mingjie, ZHANG Wenbo
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    School of Civil and Hydraulic Engineering, Ningxia University; Engineering Technique Research Center for Water Saving Irrigation and Water Resources in Ningxia, Yinchuan 750021, China
Published: 2014-12-28 doi: 10.3981/j.issn.1000-7857.2014.36.015
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In the several codes and standard equations for the punching shear strength of reinforced concrete slabs, the cover thickness is not an influencing factor of the punching shear strength. 16 specimens of reinforced concrete slabs with various cover thicknesses are selected in the tests. The punching shear strength is found to increase with the increase of the cover thickness, in a nolinear way. The mechanism of the impact of the cover thickness on the concrete slab strength is analyzed based on a comparison between the calculation results and the test results, and finally, a new calculation method is proposed through the evaluation of the incipient theoretical equation. Test data are compared with the provisions of CCES, and with the proposed equation of Matsui, a simplified equation is proposed, which enjoys a better accuracy.
reinforced concrete slab  /  punching shear strength  /  cover thickness  /  compressive strength  /  effective slab depth
杨秋宁, 毛明杰, 张文博. 钢筋混凝土桥面板保护层厚度对冲切强度的影响. 科技导报, 2014 , 32 (36) : 93 -97 . DOI: 10.3981/j.issn.1000-7857.2014.36.015
YANG Qiuning, MAO Mingjie, ZHANG Wenbo. Effects of Cover Thickness on the Punching Shear Strength of Reinforced Concrete Slabs[J]. Science & Technology Review, 2014 , 32 (36) : 93 -97 . DOI: 10.3981/j.issn.1000-7857.2014.36.015
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Year 2014 volume 32 Issue 36
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doi: 10.3981/j.issn.1000-7857.2014.36.015
  • Receive Date：2014-06-19
  • Online Date：2015-01-09
  • Published：2014-12-28
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  • Received：2014-06-19
  • Revised：2014-10-16
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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