2015/10/25 4.Shear resistance of members strong shear-weak flexure beam P≤015A) v=nMtM +Vo 540 Shear strength of beams th reducton in the V=1.I Miu Ming +Von 5s六0m+125÷) Shear strength of columns 3切 . r=1.2M+M) H 本课件版权归作者所有，仅供个人学习使用，请勿转载。 10 2015/10/25 10 .0( 15 ) 1 bh0 V f cc RE    For Beam：If ratio of span to depth (跨高比) is NOT greater than 2.5, For Column and Wall：If shear span ratio (剪跨比) is NOT greater than 2, the design shear force should satisfy the following equation: .0( 30 ) 1 jjcj RE Vj  hbf   (5.46) For Joint： 4.3 Shear resistance of members To ensure ductile flexural failure and prevent brittle shear failure, a principle of “strong shear—weak flexure” should be followed in seismic design of reinforced concrete beams. Gb n r b l b vb V l MM V    strong shear—weak flexure For beams in grade 1 frames, is 1.3. For beams in grade 2 frames, is 1.2. For beams in grade 3 frames, is 1.1. vb vb vb Gb n r bua l bua V l MM V    1.1 For beams in grade 1 and earthquake intensity 9, the beam and lintel may not be adjusted, but it should satisfy the following requirement. Considering shear strength reduction in the diagonal plan of beam under the repeated reversal loading, the shear strength in diagonal plan should be checked as the follows .0( 42 .1 25 ) 1 0 h0 s A V f bh f sv t yv RE b    ) 1 .1 05 ( 1 0 h0 s A V f bh f sv t yv RE b    Shear strength of beams Principle of strong shear and weak flexure To ensure ductile flexural failure and prevent brittle shear failure n b c t c vc H MM V   (5.37) For columns in grade 1 frames, is 1.5, the others are 1.4 For columns in grade 2 frames, is 1.3. 1.2 For columns in grade 3 frames, is 1.2. 1.1 For columns in grade 4 frames, is 1.1. 1.1 vc vc vc vc Shear strength of columns   n t cua b cua H MM V   2.1 For columns in grade 1 and earhtquake intensity 9, the columns may not be adjusted, but it should satisfy the following requirement. Shear strength of columns 本课件版权归作者所有，仅供个人学习使用，请勿转载