鋼筋混凝土和預應力混凝土梁式橋-簡支梁橋的計算（PPT16頁）

1、BRIDGE ENGRGPART IIPart 2 RC & PC beam bridge第二篇 鋼筋混凝土和預應力混凝土梁式橋Chapter 3 第三章 Analysis of simple supported beam bridge 簡支梁橋的計算SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算1. Load distributed on transverse beam作用于橫隔梁上的荷載沿橋跨方向確定橫隔梁上的計算荷載

2、 假定荷載在相鄰橫隔梁之間按杠桿原理法傳遞。 按一列汽車車道荷載輪重分布給中橫梁的計算荷載為：Pklay1qklaSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算rlala人群rSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN1. Load distributed on transverse beam作用于橫隔梁上的荷載 3.5 Computing the internal

3、 force on transverse beam 橫隔梁內(nèi)力計算. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力Model 計算模型 continuous beam on elastic support 橫隔梁相當于彈性支撐上的連續(xù)梁 Ri=?PR1R2R3R4R5PSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計

4、算 橫隔梁的內(nèi)力 當荷載P作用于r截面左邊時，截面上的彎矩和剪力：R1R2R3R4R5P=1reb1b2P=1SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力 當荷載P作用于r截面左邊時，截面上的彎矩和剪力：R1R2R3R4R5P=1reb1b2P=1S

5、CHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力 當荷載P作用于r截面右邊時，截面上的彎矩和剪力：R1R2R3R4R5P=1rb1b2P=1SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Comput

6、ing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力 aar截面彎矩影響線P=1e1r截面剪力影響線P=1eSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.

7、5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力影響線一般橫隔梁的彎矩在靠近橋中心線的截面較大，如A、B截面剪力則在靠近橋兩側邊緣處的截面較大,如C、D截面 P=1ABCDSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transve

8、rse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力影響線 1116R1R2R321263136梁處橫隔梁截面的彎矩影響線M31M33M36SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力影響線 梁處橫隔梁截面的彎矩影響線M31M36aa2dSCHOOL OF

9、 TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力影響線 梁、梁之間橫隔梁截面的彎矩影響線M31M362.5dSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force b

10、ased on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力影響線 梁處橫隔梁截面的剪力影響線Q21Q2611SCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN. Computing the internal force based on the stiffness transverse beam 偏壓法計算橫隔梁內(nèi)力 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力計算 確定作用在中橫隔梁上的計算荷載 Pklay1qklaSCHOOL OF TRANSPORTATION, WUT PRODUCED BY：X J CHEN 3.5 Computing the internal force on transverse beam 橫隔梁內(nèi)力計算 橫隔梁的內(nèi)力計算繪制中橫隔梁的內(nèi)力影響線布置荷載，計算截面內(nèi)力 Q21Q26M31M36P/2P/2P/2P/2SCHOOL OF TRANSPORT