Prediction of Confined Blast Loading in Single-Layer Lattice Shells

Abstract

Single-layer lattice shells (also known as gridshells) are widely used for architecturally innovative structures. When an explosion occurs inside such a structure, confined blast loading on the structural components will be seriously affected by different factors, such as charge locations and weight, structural types and forms. Moreover, slight changes of blast loading perhaps result in various responses for such a complicated structure. In this paper, blast loads on single-layer lattice shell are calculated by AUTODYN software package. The effect of scaled distance, ratio of rise to span and ratio of height to span are investigated. Simplification of blast loading is studied, and the principles of equivalent loading process are validated with a 40 meters single-layer Kiewitt-8 reticulated dome. In order to predict the blast loading, a precise and simple model is derived from numerical results, which is suitable for a wide scope of single-layer lattice shells. Two applications with different charge weight, structural spans and forms are worked out by using the blast prediction model. Good agreements of comparisons are achieved between prediction model and numerical results.

Study of Seismic Resistance of Kiewit-8 Dome Considering Key Structural Design Parameters

“…In the field of aircraft structures, the limit loads/design loads can be estimated by dividing the ultimate loads by, a factor of safety, 1.5, and the failure probability of the aircraft can be accepted. Because of the significance of domes, the same factor of uncertainty of 1.5 has been used to evaluate the limit loads/design loads, which can be obtained approximately using equation (10).…”

“…Single-layer domes are adopted worldwidely as long-span roofs in recent decades [1][2][3] because of their advantages, such as their good aesthetic appearance, large space coverage capability and sound structural performance. Current research work is mainly focused on the structural response [4][5][6][7][8][9][10], collapse [11][12][13] of the steel structure under different loads through experiment and numerical simulation analysis [14][15][16][17][18], considering stability and buckling [19][20][21][22]. Only few reports have investigated the structural dynamic failure modes [17,19,23,24] and the seismic failure loads when the single-layer reticulated shells are subject to earthquakes.…”

Failure Modes of a Reticulated Dome in a Small Airplane Crash

“…Lin et al investigated the effects of size and material properties of the impact body on the damage modes of single-layer Kiewit-8 reticulated domes using 3D numerical simulations [12]. Ma et al investigated dynamic response, failure modes, and failure mechanisms of single-layer reticulated domes subjected to interior blast loading [13] and established a precise and simple model to predict blast loading in these structures [14]. Lin et al [15] studied the dynamic response of a single-layer Kiewit-8 reticulated dome subjected to small airplane crash.…”

Experimental and Numerical Investigations of Pressure Field of Curved Shell Structure Subjected to Interior Blast

“…e exterior blast loading and failure of reticulated domes were studied by Xudong et al and Zhi et al [13,14]. Ma et al had investigated the blast distribution numerically [15,16], and the failure modes and failure mechanisms were developed [17,18]. However, the blast loading on a long-span spatial structure is not clear and verified in the existing references, which is important for the protective design of structures.…”