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BRIDGE ENGRG PART II

BRIDGE ENGRG PART II. Part 2 RC & PC beam bridge 第二篇 钢筋混凝土和预应力混凝土梁式桥. Chapter 3 第三章 Analysis of simple supported beam bridge 简支梁桥的计算. SCHOOL OF TRANSPORTATION, WUT PRODUCED BY ： X J CHEN.

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BRIDGE ENGRG PART II

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  1. BRIDGE ENGRGPART II Part 2 RC & PC beam bridge第二篇 钢筋混凝土和预应力混凝土梁式桥 Chapter 3第三章Analysis of simple supported beam bridge简支梁桥的计算 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  2. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 1. Load distributed on transverse beam作用于横隔梁上的荷载 • 沿桥跨方向确定横隔梁上的计算荷载 假定荷载在相邻横隔梁之间按杠杆原理法传递。 按一列汽车车道荷载轮重分布给中横梁的计算荷载为： Pk qk la la Ω y1 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  3. Ωr 3.5 Computing the internal force on transverse beam 横隔梁内力计算 1. Load distributed on transverse beam作用于横隔梁上的荷载 ｑr 人群 la la • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  4. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • Model计算模型 continuous beam on elastic support 横隔梁相当于弹性支撑上的连续梁 P P Ri=? R1 R2 R3 R4 R5 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  5. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力 P=1 当荷载P作用于r截面左边时，截面上的弯矩和剪力： P=1 e r R1 R2 R3 R4 R5 b2 b1 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  6. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力 P=1 当荷载P作用于r截面左边时，截面上的弯矩和剪力： P=1 e r R1 R2 R3 R4 R5 b2 b1 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  7. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力 P=1 当荷载P作用于r截面右边时，截面上的弯矩和剪力： P=1 r R1 R2 R3 R4 R5 b2 b1 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  8. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力 P=1 e P=1 e a 1 a r截面弯矩影响线 r截面剪力影响线 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  9. P=1 ① ② ③ ④ ⑤ ⑥ 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力影响线 一般横隔梁的弯矩在靠近桥中心线的截面较大，如A、B截面 剪力则在靠近桥两侧边缘处的截面较大, 如C、D截面 A B D C • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  10. η26 η21 η36 η31 ηM31 ηM36 ηM33 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力影响线 ① ② ③ ④ ⑤ ⑥ ③梁处横隔梁截面的 弯矩影响线 R1 η16 η11 R2 R3 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  11. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 a • 横隔梁的内力影响线 ③梁处横隔梁截面的 弯矩影响线 a ① ② ③ ④ ⑤ ⑥ ηM31 ηM36 2d • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  12. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力影响线 ① ② ③ ④ ⑤ ⑥ ③梁、④梁之间横隔梁截面的 弯矩影响线 ηM31 ηM36 2.5d • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  13. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 ２. Computing the internal forcebased on the stiffness transverse beam 偏压法计算横隔梁内力 • 横隔梁的内力影响线 ②梁处横隔梁截面的 剪力影响线 1 ① ② ③ ④ ⑤ ⑥ ηQ26 ηQ21 1 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  14. Pk qk la la Ω y1 3.5 Computing the internal force on transverse beam 横隔梁内力计算 • 横隔梁的内力计算 • 确定作用在中横隔梁上的计算荷载 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  15. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 • 横隔梁的内力计算 • 绘制中横隔梁的内力影响线 • 布置荷载，计算截面内力 P/2 P/2 ηM31 ηM36 η１ η２ P/2 P/2 ηQ26 ηQ21 η２ η１ • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

  16. 3.5 Computing the internal force on transverse beam 横隔梁内力计算 • 横隔梁的内力计算 • 荷载组合 忽略横隔梁恒载内力，只考虑活载组合 • SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN

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