Test Study on Basic Static Characteristics of Cable Supported Barrel Vault Structure

Abstract

By combining single layer cylindrical latticed shell (SLCLS) and beam string structure, a new-style prestressed spatial structure cable supported barrel vault structure (CSBV) is formed. Taking a practical CSBV project as prototype, a scaled model with a scale of 1:15 is designed and fabricated, the static loading test is carried out. Research results indicate that the characteristics of the prototype structure can be reflected by this model test. As the load increases, the change rule of the test values of the cables' forces agree with that of theoretical values. The two outmost cables' forces are generally smaller than the other interior cables' forces. The cables' forces in the symmetrical places keep closer. For rods' forces and nodal displacements of CSBV, the test values and theoretical values both keep closer. The differences between test values and theoretical values increases with the load. The test values are larger than the theoretical values, but the change rule still matches. Compared with SLCLS in the same condition, the rods' forces and nodal displacements of the CSBV are both smaller, and the mechanic characteristics of CSBV are more efficient.Keywords: Cable supported barrel vault, Beam string structure, Cylindrical latticed shell, Rise-span ratio, Sag-span ratio, Strut number INTRODUCTIONSpatial structures with longer span have gained more popularity in recent years. New types of spatial structures appear from time to time nowadays, such as cable dome structure, beam string structure, suspend-dome structure and cable supported barrel vault structure (CSBV). CSBV is a new-style highly efficient pre-stressed spatial structure. Inspired by beam string structure [1][2][3][4][5][6][7], and based on the single layer cylindrical latticed shell (SLCLS) [8], CSBV was first proposed. It consists of struts and cables distributed at suitable positions in the single layer cylindrical latticed shell. On one hand, stiffness of the whole structure is enhanced due to the introduction of pre-stressed cables and struts, which can effectively solve the problem SLCLS out-plane stability [9]. On the other hand, both steel usage and construction difficulty are significantly reduced. Moreover, horizontal forces that the supports bear and the burden on the lower structure are significantly reduced, due to the setting of cables which could be pre-stressed. This new-style structure was first proposed and its basic mechanical properties were theoretically studied in paper [10]. Theoretical research on mechanic feature of CSBV was carried out in paper [11], the initial prestress design method was proposed. The dynamic feature of CSBV was studied in papers [12] and [13], the wind resistant design method and seismic design method were respectively proposed.Model test is one of the best methods to study mechanic feature of a new-style structure system. Directed by theoretical research results, the static loading test on a CSBV is carried out in this paper, and test details are listed below.

Numerical and Experimental Investigation of the Mechanical Behavior of Cable‐Supported Barrel Vault Structures with Varying Temperature

“…In equations (2) and 3, ξ is 0.02 and f 1 and f 2 are the frequencies of the rst and second vibration modes, respectively, which are given in Tables 2-5. After the timehistory analysis, the maximum displacement of the nodes, cable force, strut force, USSM force, and reaction force can be obtained.…”

“…e static and dynamic performance of cable-supported barrel vault (CSBV) structures has been investigated using numerical and experimental methods, and superior static and dynamic performance compared to barrel vault structures has been demonstrated [2,3]. In addition, a series of theoretical analyses and experimental studies have been carried out on the string structure, including form-finding analyses [4][5][6], structural optimization [7,8], static behavior analyses [9][10][11], dynamic characteristics and seismic response analyses [12], prestress design methods [13], sensitivity analyses [14], and stability studies [15][16][17][18].…”

Experimental Study on the Fundamental Mechanical Features of Cable-Supported Ribbed Beam Composite Slab Structure

“…Because of the action of the pre-stressed cables, such systems are highly efficient in load-deformation performance and usually self-balanced. The cable-supported spatial structure systems including beam (truss) string structure [4][5][6][7], suspend-dome structure [8,9], and cable-supported barrel vault structure [10][11][12][13], have been widely used in the public buildings around the world. The cable-supported ribbed beam composite slab structure (CBS) is one of such structures that effectively utilize different building materials.…”