杠杆法计算不等跨连续梁

 王开明

(安康市交通规划设计院,陕西 安康  725000

  要:对于三跨不等跨连续梁,当荷载作用在中跨时,用等跨连续梁的公式不能求解,因计算杆长系数K2的β成为随跨径比K1变化的变量,需借助力法得出不同K1的β、ε系数,然后再按K1查表计算,可得出与采用力法、位移法相同的计算结果。本文提供了部分跨径组合的β、ε系数,供相同K1解算时参考使用。

关键词:杠杆法;不等跨;连续梁 

中图分类号U442                文献标识码A

Study on The Calculation of Unequal Span

Continuous Beam by Leverage Method

WANG Kai-ming

Ankang Traffic Planning and Design InstituteAnkang Shaanxi 725000China

AbstractWhen loads were applied on the middle span of three unequal spans continuous-beamsthe formula of equal span continuous beam could not be use to calculate the loads. Because of the β of the leverage length ratio coefficient K2 became a variable of span ratio K1the exact same result could be got by calculating the coefficients β and ε using the force methods and K1 table in consonance with the force method and displacement method. This paper provided the combination of partial span ratio coefficients β and ε as a referencing to resolve the same K1.

Key wordsleverageunequal spancontinuous beam