A case study on the internal pressure induced by a local failure on the vulnerable gable roof of a low-rise building was extensively conducted experimentally and numerically. Five roof opening configurations were tested in the wind tunnel under three different boundary layer conditions, based on 1:40 scaled models. The effects of opening shape, opening position, opening ratio, building internal volume, and wind speed on peak transient and steady-state internal pressures were studied. The study results indicate that the peak transient and steady-state internal pressures and the corresponding transient overshoot ratio all increase with an increasing opening ratio. The peak steady-state internal pressure is little affected by the approaching wind speed; while the peak transient internal pressure coefficient shows a significant linear relationship with the wind speed. The coupling effect of vortex shedding and Helmholtz resonance in double building volume compensation situation may cause larger fluctuating internal pressure. Both the vortex shedding and Helmholtz resonance reduce the internal pressure coherence to some extent. The agreement between the numerical and experimental results is much better for the mean internal pressure than that for fluctuating internal pressure or peak internal pressure.

对低层建筑易损山墙屋顶局部破坏引起的内部压力的案例研究进行了广泛的实验和数值研究。基于 1:40 比例模型，在风洞中在三种不同边界层条件下测试了五种屋顶开口配置。研究了开口形状、开口位置、开口比、建筑物内部容积和风速对峰值瞬态和稳态内部压力的影响。研究结果表明，峰值瞬态和稳态内压以及相应的瞬态超调率都随着开度的增加而增加。峰值稳态内压受接近风速的影响很小；而峰值瞬态内压系数与风速呈显着线性关系。双建筑体积补偿情况下涡旋脱落与亥姆霍兹共振的耦合作用可能导致较大的内压波动。涡旋脱落和亥姆霍兹共振都在一定程度上降低了内压相干性。平均内压比波动内压或峰值内压的数值和实验结果的一致性要好得多。