The grillage adaptive beam string structure(GABSS)is a new type of smart structure that can self-adjust its deformation and internal forces through a group of active struts(actuators)in response to changes in environm...The grillage adaptive beam string structure(GABSS)is a new type of smart structure that can self-adjust its deformation and internal forces through a group of active struts(actuators)in response to changes in environmental conditions.In this paper,an internal force control method based on a gradient–genetic algorithm(GGA)is proposed for the static control of a tensioned structure(especially the GABSS).Specifically,an optimization model of the GABSS is established in which the adjustment values of the actuators are set as the control variables,and the internal force of the beam is set as the objective function.The improved algorithm has the advantage of the global optimization ability of the genetic algorithm and the local search ability of the gradient algorithm.Two examples are provided to illustrate the application of the GGA method.The results show that the proposed method is practical for solving the internal force control problem of the GABSS.展开更多
After entering 2000, China's economy and comprehensive strength has a significant growth. Because of the excellent performance of steel itself to make it an ideal structural material, steel structure began to be u...After entering 2000, China's economy and comprehensive strength has a significant growth. Because of the excellent performance of steel itself to make it an ideal structural material, steel structure began to be used in bridges, venues, high-rise buildings and long-span structures. With the rapid development of steel structure, prestressing technology is introduced into steel structure, which greatly improves the stability of the structure while saving steel, and gives full play to the tensile and compressive strength of steel while adjusting steel stiffness. Yulin airport rigid truss string, the entire roof structure for flexible steel wire and cable, at both ends by anchorage is linked together, the abdomen by welding the ball on the pipe clamp and truss and cable are linked together. The system give full play to the rigid component and the advantage of flexible cable, the beam string structure system with simple, structure forms, stress the characteristics of clear, light weight, convenient construction. Therefore, it has a good application prospect.展开更多
Prestressed steel structure is a preliminary prestressed construction of steel members or the whole structure before the load is applied to the structure. The stress direction is opposite to the load direction. When t...Prestressed steel structure is a preliminary prestressed construction of steel members or the whole structure before the load is applied to the structure. The stress direction is opposite to the load direction. When the load is applied, the safety and stability of the structure can be ensured. The prestressed steel structure greatly improves the stability and bearing capacity of the structure while saving steel. The project abandons the traditional bending members and consists of tension cables and compression struts. The roof structure is extremely light, which greatly saves the construction cost. The monitoring of prestress construction of tensioned beam is the most important element in the whole construction. This paper will discuss the monitoring of prestress construction in detail.展开更多
基金supported by the National Key R&D Program of China(No.2017YFC0806100)the National Natural Science Foundation of China(No.51578491)。
文摘The grillage adaptive beam string structure(GABSS)is a new type of smart structure that can self-adjust its deformation and internal forces through a group of active struts(actuators)in response to changes in environmental conditions.In this paper,an internal force control method based on a gradient–genetic algorithm(GGA)is proposed for the static control of a tensioned structure(especially the GABSS).Specifically,an optimization model of the GABSS is established in which the adjustment values of the actuators are set as the control variables,and the internal force of the beam is set as the objective function.The improved algorithm has the advantage of the global optimization ability of the genetic algorithm and the local search ability of the gradient algorithm.Two examples are provided to illustrate the application of the GGA method.The results show that the proposed method is practical for solving the internal force control problem of the GABSS.
文摘After entering 2000, China's economy and comprehensive strength has a significant growth. Because of the excellent performance of steel itself to make it an ideal structural material, steel structure began to be used in bridges, venues, high-rise buildings and long-span structures. With the rapid development of steel structure, prestressing technology is introduced into steel structure, which greatly improves the stability of the structure while saving steel, and gives full play to the tensile and compressive strength of steel while adjusting steel stiffness. Yulin airport rigid truss string, the entire roof structure for flexible steel wire and cable, at both ends by anchorage is linked together, the abdomen by welding the ball on the pipe clamp and truss and cable are linked together. The system give full play to the rigid component and the advantage of flexible cable, the beam string structure system with simple, structure forms, stress the characteristics of clear, light weight, convenient construction. Therefore, it has a good application prospect.
文摘Prestressed steel structure is a preliminary prestressed construction of steel members or the whole structure before the load is applied to the structure. The stress direction is opposite to the load direction. When the load is applied, the safety and stability of the structure can be ensured. The prestressed steel structure greatly improves the stability and bearing capacity of the structure while saving steel. The project abandons the traditional bending members and consists of tension cables and compression struts. The roof structure is extremely light, which greatly saves the construction cost. The monitoring of prestress construction of tensioned beam is the most important element in the whole construction. This paper will discuss the monitoring of prestress construction in detail.
