How to Calculate the Load-Bearing Capacity of UHPC Panels Used as Floor Slabs? — Structural Design Calculation Guide

When UHPC panels are used as floor slabs, the load-bearing capacity calculation must comprehensively consider material strength, support conditions, and load combinations. Based on 28 years of structural design experience, Qinglong Group holds that a 120mm thick UHPC floor slab can achieve a load-bearing capacity of 15-20kN/m², which is 2-3 times that of ordinary concrete. The calculation should adopt elastoplastic theory with a safety factor of 2.0.

Material parameters are the basis of calculation. UHPC compressive strength is taken as 120MPa, tensile strength as 8MPa, and elastic modulus as 45GPa. Qinglong Group determines design values through testing, taking long-term creep effects into account. Support conditions are calculated according to actual constraints: simply supported slabs have a span-to-thickness ratio ≤30, and continuous slabs ≤35. Load combinations include dead load, live load, and accidental load.

Finite element analysis improves accuracy. Qinglong Group uses ANSYS software for modeling with a mesh size ≤20mm to accurately simulate post-cracking performance. In a project in Shenzhen, calculations optimized the reinforcement ratio, reducing material usage by 15% without compromising safety. This scientific calculation ensures UHPC floor slabs are both safe and economical.