A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for determining full-bridge response of suspension bridge under action of eccentric live load
The invention belongs to the field of bridge calculation theories, and particularly relates to a method for determining full-bridge response of a suspension bridge under the action of eccentric live load. The method comprises the following steps: determining basic unknown quantities required by internal force and deformation conditions of main components of a full bridge; analyzing main cable response of each span; analyzing main beam response; analyzing suspender and bridge tower response; building a control equation set by utilizing the height difference and span closing of the two ends of main cables of upstream and downstream sections of the suspension bridge, the unstressed length conservation of the main cables and suspenders, the torsion angle of the end of a main beam being 0, and the stress and moment balance conditions of the main beam; solving values of basic unknown quantities simultaneously meeting all control equation sets; and substituting the value of the basic unknown quantity into the main cable response expression, the main beam response expression and the suspender and bridge tower response expression of each span to determine the internal force and deformation of each component of the bridge. According to the method, rigid body displacement of the main beam and suspender inclination are considered, and the method is closer to engineering practice; complex calculation is avoided, calculation is convenient, and application is convenient.
本发明属于桥梁计算理论领域，特别涉及一种偏心活载作用下的悬索桥全桥响应的确定方法。该方法包括确定可全桥主要构件的内力及变形情况所需要的基本未知量；分析各跨的主缆响应；分析主梁响应；分析吊杆及桥塔响应；利用悬索桥上下游各节段主缆的两端的高度差与跨径闭合、主缆和吊杆的无应力长度守恒、主梁端部扭转角为0、主梁所受力与力矩平衡条件建立控制方程组；解得同时满足所有控制方程组的基本未知量的值；将基本未知量的值代入分析各跨的主缆响应表达式、分析主梁响应表达式、分析吊杆及桥塔响应表达式中，确定桥梁各构件的内力及变形。本方法，考虑了主梁的刚体位移及吊杆倾斜，更贴近工程实际；规避了复杂计算，计算方便，便于应用。
Method for determining full-bridge response of suspension bridge under action of eccentric live load
The invention belongs to the field of bridge calculation theories, and particularly relates to a method for determining full-bridge response of a suspension bridge under the action of eccentric live load. The method comprises the following steps: determining basic unknown quantities required by internal force and deformation conditions of main components of a full bridge; analyzing main cable response of each span; analyzing main beam response; analyzing suspender and bridge tower response; building a control equation set by utilizing the height difference and span closing of the two ends of main cables of upstream and downstream sections of the suspension bridge, the unstressed length conservation of the main cables and suspenders, the torsion angle of the end of a main beam being 0, and the stress and moment balance conditions of the main beam; solving values of basic unknown quantities simultaneously meeting all control equation sets; and substituting the value of the basic unknown quantity into the main cable response expression, the main beam response expression and the suspender and bridge tower response expression of each span to determine the internal force and deformation of each component of the bridge. According to the method, rigid body displacement of the main beam and suspender inclination are considered, and the method is closer to engineering practice; complex calculation is avoided, calculation is convenient, and application is convenient.
本发明属于桥梁计算理论领域，特别涉及一种偏心活载作用下的悬索桥全桥响应的确定方法。该方法包括确定可全桥主要构件的内力及变形情况所需要的基本未知量；分析各跨的主缆响应；分析主梁响应；分析吊杆及桥塔响应；利用悬索桥上下游各节段主缆的两端的高度差与跨径闭合、主缆和吊杆的无应力长度守恒、主梁端部扭转角为0、主梁所受力与力矩平衡条件建立控制方程组；解得同时满足所有控制方程组的基本未知量的值；将基本未知量的值代入分析各跨的主缆响应表达式、分析主梁响应表达式、分析吊杆及桥塔响应表达式中，确定桥梁各构件的内力及变形。本方法，考虑了主梁的刚体位移及吊杆倾斜，更贴近工程实际；规避了复杂计算，计算方便，便于应用。
Method for determining full-bridge response of suspension bridge under action of eccentric live load
一种偏心活载作用下的悬索桥全桥响应的确定方法
ZHANG WENMING (author) / LU XIAOFAN (author) / LIU ZHAO (author) / WANG JINGQUAN (author)
2021-10-01
Patent
Electronic Resource
Chinese
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