firm soil meaning in Chinese

硬土

Based on this study the following conclusions are drawn : the responses of cable - stayed bridge under seismic excitations with spatial variations differ from those under uniform seismic excitations up to 30 % ; the responses obtained by considering travelling effect as well as incoherence effect are close to those obtained by only considering travelling effect ; travelling effect has more significant effect on the seismic responses of cable - stayed bridge than incoherence effect ; if r . m . s . ( root - mean - square ) of random seismic ground motions are equal , seismic responses are considerably greater for the case of soft soil than for the cases of firm soil or medium soil
研究结果表明：与一致地震激励相比，地震动的空间变化特性可以使斜拉桥的地震响应改变30 % ；同时考虑行波效应、部分相干效应时的地震响应接近于仅考虑行波效应时的地震响应；行波效应对斜拉桥地震响应的影响明显大于部分相干效应的影响；在加速度均方根相同的随机地震作用下，斜拉桥在软场地条件下的地震响应明显大于在硬场地条件下的响应，中等场地条件下的地震响应介于两者之间。