Table 5 Strain at points before and after failure for D4 condition.

From: Dynamic experimental study on anti-progressive collapse of polyline-shaped large-span double-layer grid space structure

Measurement point number

ε/10−6

Before

After

∆ε

A1-1

71

172

101

A2-2

82

− 48

− 130

A3-1

117

219

102

A4-1

− 150

− 105

45

A6-1

− 153

53

206

A7-1

− 34

− 577

− 543

A7-2

− 25

481

506

A8-1

− 126

− 1252

− 1126

A10-1

136

− 252

− 388

A10-2

88

276

188

  1. The value of the ∆ε in the table is calculated by taking the difference between the strain values after and before failure.
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