The paper presents a simplified method for calculation of resistance of a TCC slab in fire conditions. Within the method the tensile and the compressive failure criteria in the outermost fibres of the cross-section are checked. The influence of the fire is applied through one-dimensional charring of the timber part of the cross-section in accordance with current standards on reduction of properties of materials. The concrete-timber connection is assumed to be ideal during the determination of resistant moment of the TCC cross-section. On the other hand, the calculation of the deflection of the TCC slab is conducted with the reduction of the connection’s rigidity. The ineffective zone of the timber as well as the cracked tensile zone of concrete part do not contribute to the effective stiffness of the TCC slab. The method is validated against the results of full sized fire tests of one way spanning TCC slabs form literature. Calculated and experimentally determined midspan deflections and failure times of the TCC slabs are compared and their considerable agreement is observed. Due to its convenience and accuracy, the present simplified method represents a useful tool for designers of TCC structures in fire conditions.

中文翻译：

---

木-混凝土复合板的耐火性能

本文提出了一种计算 TCC 板在火灾条件下的阻力的简化方法。在该方法中，检查横截面最外层纤维的拉伸和压缩破坏标准。根据当前关于降低材料性能的标准，通过对横截面的木材部分进行一维炭化来施加火的影响。在确定 TCC 截面的抗弯矩时，假定混凝土-木材连接是理想的。另一方面，TCC板挠度的计算是随着连接刚度的降低而进行的。木材的无效区以及混凝土部分的开裂受拉区对 TCC 板的有效刚度没有贡献。该方法根据文献中一种跨越 TCC 板的全尺寸防火测试的结果进行了验证。计算和实验确定的跨中挠度和 TCC 板的失效时间进行了比较，并观察到它们相当大的一致性。由于其方便性和准确性，本简化方法代表了火灾条件下 TCC 结构设计者的有用工具。