Benchmark 5: Combined forces check example H.5A

Project file: AISC_360_16_Combined_forces_Example_H_5A.esa

SCIA Engineer Version R22.0

Introduction

In this benchmark determine the available torsional strength of an ASTM A500, Grade C, HSS6x4x1/4.

Reference results

The material properties are as follows:

ASTM A500 Grade C
F_y = 50 ksi
F_u = 62 ksi
E = 29000 ksi

Geometric properties are as follows:

t = 0.233 in.

b/t = 14.2

h/t = 22.8

C = 10.1 in³

The available torsional strength for rectangular HSS is stipulated in AISC Specification Section H3.1. The critical stress, F_cr, is determined from AISC Specification Section H3.1(b).

Because h/t > b/t, h/t governs.

Therefore use AISC specification equation H3-3 to determine F_cr:

The nominal torsional strength is:

From AISC Specification Section H3.1, the available torsional strength is:

 

SCIA Engineer results

AISC_360_16_Combined_forces_Example_H_5A.pdf

Comments

The results correspond to the benchmark results.